Test your mouse online for free in the browser. Check left, right, middle and side buttons, detect double-clicking and switch faults, measure polling rate, track drag strokes and scroll wheel events, and run CPS click speed tests with adjustable thresholds.

Free online income tax calculator for China salaries. Estimate monthly withholding tax with the cumulative method, itemize social insurance and special additional deductions, compare separate vs combined annual bonus taxation, and view a month-by-month net pay breakdown.

Free online unit converter covering 23 categories including length, weight, area, volume, temperature, pressure, power, energy, data size, speed and fuel economy. Instant conversion as you type, unit swap, full comparison table and one-click copy. Works on mobile and desktop.

Free online calculator, no install needed. Basic mode covers arithmetic, percent, and sign toggle; Scientific mode adds trig, log, roots, powers, factorial, absolute value, and DEG/RAD switch, with auto-saved history and one-click result copy.

Free online spirit level that uses your phone sensors to check if surfaces are level or walls are plumb. Live angle readouts, bubble view, calibration, reading lock, and sound alert. No install needed.

Online Screen Test Enhanced checks dead pixels, stuck pixels, backlight bleed, interference, geometry, contrast, gradients and saturation. Fullscreen mode, category jumps, zoom tips and mobile swipe help you inspect monitors and phones fast.

Online HTML5 Fish Bowl benchmark that renders swimming fish with Canvas to measure browser animation FPS and smoothness. Adjust fish count and toggle layers to evaluate graphics performance.

Online Poison Mushroom Benchmark uses WebGL volume shading to measure local GPU FPS and stability. Switch mushroom, cosine, or Julia presets, adjust resolution, export scores, and edit kernels to compare graphics performance across devices quickly.

Claim Meituan hotel and homestay coupons in one place, including red packets, hotel discounts, and exchange vouchers, with filters, tap-to-claim, and QR scanning.

Ride and Travel Coupon Finder gathers Didi, Huaxiaozhu, driver service, flight and train ticket deals, supporting quick claim, QR scan and code copy before traveling.

Taobao Instant Coupons collects food delivery, retail, medicine, grocery and store deal entries, supporting quick claim, QR scan and code copy before ordering.

Claim daily Meituan coupons for food delivery, group buying, instant retail, medicine, flowers and fruits. Tap to claim or scan QR codes to save on every order. Copy commands to open the Meituan app. Actual discounts subject to Meituan's page display.

Free online M3U8 player supporting HLS live streams and VOD playback. Paste your URL and play instantly, no software needed.

Free online punishment wheel with 6 preset libraries: classic, mild, dare, drinking, couples & team building. Fully customizable. Perfect for parties and group games.

Free online spin-the-wheel tool with list and prize modes. Customize entries, colors and weights for lucky draws, classroom picks, team decisions and more.

Free online tool to quickly find postal codes and telephone area codes for cities and districts across China. Search by city, district, postal code, or area code. Essential for mail and communication.

Confused about waste sorting? Use our free Waste Classification Tool! Quickly find out if items are Recyclable, Hazardous, Wet, Dry, or Bulky Waste. Sort smarter, live greener.

A comprehensive and efficient online tool for special symbols. Find thousands of unique characters including emojis, math symbols, arrows, currency, punctuation, and number series. Supports quick search by keywords, and one-click copy. Enhance your work and social communication effortlessly.

Explore the most complete online Emoji collection, featuring thousands of the latest and popular Emoji symbols. Easily browse by category (People, Animals, Food, Activities, Flags & more) or search by keyword. Copy any Emoji instantly with one click for easy pasting.

Free online BMI calculator. Enter your height and weight to quickly calculate your Body Mass Index (BMI). Understand your BMI category (Underweight, Normal, Overweight, Obese) and get tailored diet and exercise advice for healthy weight management.

Use our food calorie lookup tool to quickly find calories and nutritional information for various foods, including protein, fat, carbohydrates, and more. It's an easy way to manage your diet and health planning.

The Blood Type Inheritance Tool provides professional genetic information services. Quickly calculate potential blood types for offspring, offering users valuable genetic insights and support.

Free online Chinese Almanac (Huangli/通胜) tool. Instantly check daily auspicious (Yi 宜) & inauspicious (Ji 忌) activities, lucky hours, directions, and traditional lunar calendar details.

Random Lottery Tool: Quickly configure participants and prizes, supports custom prize quantities and repeat winners. Perfect for events and corporate raffles!

Convert plain text into various fancy English font styles. Supports 32 unique styles and allows one-click copying.

The Random Password Generator safely creates complex passwords, including numbers, uppercase and lowercase letters, and special characters.

Retrieve QQ, email, and space avatars online by entering a QQ number. The tool is clean, login-free, and multi-device, helping users preview account images and manage profile info efficiently for everyday use.

Free online keyboard test. Press any key and the matching keycap lights up instantly. Full-size layout with tested-key marks and left/right modifier detection, all handled locally in your browser.

Online browser detection tool to instantly check your browser name, version, engine, OS, and device properties. Supports User-Agent parsing for quick browser environment identification.

Query current and historical administrative division codes and information for China. Features province-city-district lookups, place name fuzzy search, and statistics on China's administrative structure and historical changes.

Online tool to query and validate Chinese national ID card numbers. Quickly find information like issuing region (administrative division code), date of birth, and gender.

Confused by family titles? Our Kinship Calculator instantly clarifies relationships. Enter 'father's sister' to find the correct term, how to address them, or how they address you. Simplify family connections!

Free online DICOM viewer to open imaging folders, zip archives, .dcm and NIfTI files directly in the browser - no install needed. Browse CT & MRI in axial, coronal and sagittal planes, adjust window width and level, and scroll through slices. Files are parsed locally and never uploaded.

Create a printable multiplication table: 45-entry triangle or 81-entry grid, range up to 19. Adjust font size, print to A4, export PNG or copy the equations as text.

Free online whiteboard in your browser: draw, add shapes, text and pasted images, use paper, grid or blackboard backgrounds, keep up to 30 pages and export any page as PNG. No sign-up needed.

Fill template placeholders with numbers, letters, dates, sequences and custom lists, then generate all combinations in bulk - ideal for codes, filenames and test data.

Record audio directly from your microphone in the browser. This online voice recorder offers noise reduction, stereo, a live volume meter, pause and resume, and one-click export to MP3 or WAV. Everything runs locally for free with no install.

Record your screen, a window or a tab right in Chrome or Edge — no install. Choose 720p/1080p/1440p, capture mic and system audio, pause or resume, use a floating status window, then download WebM locally for free.

Share files and text between phones, computers, and tablets on the same WiFi or hotspot. Scan a QR code to connect directly device-to-device without a server, cable, or sign-up. Supports multiple files, auto-download, and batch download for fast, private transfers.

Free online mortgage calculator. Enter loan amount, annual rate and term to instantly get monthly payment, total interest and total repayment. Compare equal installments vs equal principal, support housing fund and combination loans, generate a full amortization schedule and export to Excel.

Convert a whole PDF into a single vertical long image. Choose JPEG or PNG, set resolution and page range, and adjust JPEG quality. Runs entirely in your browser with no upload, great for mobile viewing and sharing.

Sign PDFs in your browser: draw a signature or upload a signature image, drag to position, resize it, and choose which pages to sign, then download or ZIP multiple files with no server upload. Image-based, not a legally binding e-signature.

Extract embedded images from PDF files online in bulk. Auto-deduplicate, filter small icons by minimum size, preview thumbnails, download individually or pack all into a ZIP. Runs fully in your browser with no upload.

Extract text from PDF files right in your browser, keeping page breaks and reading order. Add multiple files for automatic extraction, then copy or download the result as TXT with no server upload. Text-layer PDFs only; scanned files have no extractable text.

Add page numbers, headers, and footers to PDFs right in your browser. Choose formats like "Page X of Y", Roman or Chinese numerals, and customize position, starting number, font size, color, and margin, with a live preview and batch processing.

Unlock PDF files in your browser by entering a known password to remove encryption, opening restrictions, and permission limits. Batch-process multiple files, download results individually or as a ZIP, with no server upload.

Free online PDF encryption with AES-256, processed entirely in your browser. Set an open password, restrict printing, copying, and editing, encrypt multiple PDFs in batch, and download results individually or as a ZIP.

Add text or logo watermarks to PDFs free online, in batch. Choose tile, center, 3x3 grid, or corners layouts, adjust size, color, opacity, and rotation, set a page range, preview instantly — all processed locally in your browser.

Free online PDF organizer that runs entirely in your browser with no server upload. Drag pages to reorder, rotate, delete, and export selected pages to a new PDF, with thumbnail previews for source and result on desktop and mobile.

Convert JPG, PNG, WebP, and BMP images to a single PDF online for free. Choose A4 portrait, landscape, or image-sized pages, and reorder pages by dragging. Everything runs in your browser — files are never uploaded. Preview and download instantly.

Convert PDF pages to PNG or JPG images online for free. Choose 72–300 DPI resolution, pick page ranges, and adjust JPEG quality. Everything runs in your browser — files are never uploaded. Download images individually or as a ZIP.

Free online PDF splitter. Extract specific pages, split by page ranges, every N pages, or by file size. Everything runs locally in your browser, with ZIP batch download.

Merge multiple PDFs into one file in your browser, in the order you choose. No upload. Drag to add and reorder, preview before and after merge, then download — for contracts, handouts, and submissions.

Free online PDF compressor that shrinks PDF files entirely in your browser — no upload, privacy-friendly. Batch compression, three quality presets plus custom sharpness and encoding, before/after preview, and one-click ZIP download.

Free text replace tool for batch find and replace online, supporting plain text, regex patterns and multiple rules in sequence. Ideal for version updates, copy changes and data formatting with one-click copy.

Mirror and control your Android phone directly in Chrome or Edge using WebUSB—no client installation required. Enjoy low-latency screen mirroring with keyboard and mouse control, fullscreen mode, screenshots, screen recording and file transfer. Optimized from PANDASCRCPY for Android development, debugging, testing, demos and remote assistance.

Practice arithmetic online with addition, subtraction, multiplication, and division. Choose ranges and question counts, get instant feedback, review results.

Add pinyin above Chinese text in textbook ruby style. 8 formats: tone marks, Bopomofo and more. Export as image, rich text, or HTML code. Free to use online.

Free online screen color picker. Click to sample any color on your screen and instantly get HEX, RGB, HSL, HSV, and CMYK values. One-click copy for designers and developers.

Free online color format converter supporting HEX, RGB, HSL and RGBA conversion. Features a visual color picker, preset swatches, real-time preview, and one-click copy for each format.

Free online Chinese and English punctuation converter. Switch between full-width and half-width symbols instantly with real-time text highlighting updates.

A professional free online electronic signature maker offering both hand-drawn and text-generation modes. It operates entirely locally in your browser, ensuring no data is uploaded for maximum privacy. Features include customizable brush colors, sizes, and calligraphy fonts with advanced stroke algorithms. Easily export as transparent PNG or white-background JPG for Word, PDF, and contract signing.

Professional online tool to generate software multi-instance batch scripts for Windows. Easily create custom .bat files for WeChat, QQ, and more. Enter the app path and instance count to generate, copy, or download scripts instantly. Increase productivity by managing multiple accounts safely. A free, user-friendly automation tool designed for seamless software cloning on your PC.

Preview audio online by entering a URL—no download needed. Supports MP3, WAV, OGG, and other common formats. Quickly verify audio links for developers, creators, and testers.

Preview videos online by entering a URL—no download needed. Supports MP4, WebM, and other common formats. Quickly verify video links for developers, creators, and testers.

Avoid unnecessary downloads! Preview images, videos, audio, PDFs & text files directly in your browser. Just enter a URL—save time and storage. Supports common formats.

Preview images online by entering a URL—no download required. Supports common formats and helps quickly verify image links for developers, designers, and creators.

Comprehensive Windows 10 and 11 keyboard shortcut guide covering copy, paste, switch, refresh, screenshot, and other essential commands to boost productivity and efficiency.

Free browser speech synthesis tool based on Web Speech API for real-time text-to-speech conversion. Supports Chinese and multiple languages, integrated with Microsoft voice technology. No download or installation required, use directly in browser. Suitable for learning assistance, accessibility reading, content presentation and other scenarios. Provides high-quality online TTS service.

Free online title case converter tool. Supports Title Case, Sentence Case, Smart Title formatting and other conversion modes. Bulk process multiple lines of text, simple operation, improve writing and editing efficiency. Suitable for article titles, news headlines, content formatting and other scenarios.

Free online text case converter tool. Quickly convert English letters to uppercase or lowercase. Simple operation, instant conversion, improve text processing efficiency.

Powerful online random name generator and picker tool. Generate unique Chinese or English names from a vast list. Customize surname, gender, name length, and export your random name list (e.g., 500, 1000 names) to Excel or TXT.

Real-time Gaokao countdown with official MOE exam dates. Custom timer for CET/Postgraduate exams. Precision time management tool for 10M+ Chinese students

Free online word counter that counts words and characters in real time. Supports Chinese characters and English words, with an option to include or exclude spaces and newlines. Ideal for writing, editing, and content checks.

Explore our interactive Periodic Table to find chemical elements with their atomic number, symbol, name (including Chinese Pinyin for learners), atomic mass, and classification (metals/nonmetals). A great tool for chemistry students and enthusiasts.

Free online math drill tool for grades 1–4. Practice addition, subtraction, multiplication, and division with auto-grading and history tracking. Boost calculation skills anytime.

This tool enables easy access to national capital information, enhancing your global geographic knowledge for study, work, and travel purposes.

Discover information on the start and end dates, significant events, notable figures, and more from the extensive five thousand years of history in China.

Online text deduplication tool that quickly removes duplicate lines from your text. Supports multiple separators including line breaks, commas, semicolons, and vertical bars. Optionally remove empty lines. Ideal for data cleaning, list organizing, and keyword deduplication with instant copyable results.

Powerful free online tool to convert Chinese characters (Hanzi) to Pinyin. Supports multiple styles including Pinyin with tones (zhōng), tone numbers (zhong1), initials, Bopomofo, Wade-Giles, and more. Handles heteronyms, custom separators. A great helper for learning and processing Chinese Pinyin.

An online tool for detecting sensitive words in text. Lists all detected sensitive words and replaces them with '*'.

Online tool for converting between Simplified and Traditional Chinese, Hong Kong Traditional, Taiwan Traditional, Taiwan dialect, and Japanese Shinjitai.

List of 985, 211, and Double First-Class universities in China. Query the university list.

Powerful and easy-to-use online Chinese idiom (Chengyu) dictionary. Search idioms by first character, Pinyin (with/without tones), or containing words. Quickly find Pinyin, detailed meanings, origins, and examples to help you learn and use Chinese idioms effectively.

Convert Chinese Yuan amounts between numeric and uppercase Chinese formats online. Supports both directions, handles yuan/jiao/fen units automatically, and follows official financial document standards. Free to use.

Free online tool to convert coordinates between WGS84 (GPS), GCJ02 (Mars Coordinates/Chinese State Bureau of Surveying and Mapping), and BD09 (Baidu Coordinates). Batch process latitude and longitude data accurately. A handy utility for map development and GIS tasks.

Format text paragraphs, support automatic line breaks at numbered points, and organize line breaks and spaces.

Free online random phone number generator supporting 208 countries. Batch generate realistic virtual phone numbers with custom prefix, suffix, and country code. Export to Excel or TXT instantly.

Generate random temperatures and save the results to a file

Free online Sudoku with 50 campaign levels and unlimited practice. Notes, checks, and hints help you improve. Play in the browser from Easy to Expert and train logic in short breaks.

Color Puzzle: Cow Quest is a free online logic grid puzzle game where you place one cow in each row, column, and colored region while ensuring that no two cows touch, even diagonally. Enjoy hundreds of challenging levels, sharpen your logical thinking, and play instantly in your browser with no download required.

Life Restart Simulator is a free online text-based simulation game. Random attributes and life-changing choices let you replay an entire lifetime, explore countless destinies, and restart endlessly anytime, anywhere.

Free online maze game with random maze generation from 5×5 to 50×50. Three difficulty levels, built-in timer, best record tracking, and shareable maze codes for friend challenges.

Free Pictionary word bank with 350+ words in 12 categories and 3 difficulty levels. Search, filter and draw a random word for parties, team building and classrooms.

Play free Othello online against computer AI. Choose black or white, enjoy classic Reversi strategy gameplay anytime with no download needed.

Memory Card Game is a fun matching game that tests memory and attention, suitable for players of all ages. Match patterns by remembering card positions, playable alone or with friends, enhancing focus through entertainment.

A fast-paced HTML5 virus shooter game with health bar, enemy spawning, bullet shooting, and full mouse/touch support. Play instantly on any device.

Experience the thrilling 3D cross road game. Control your character to avoid vehicles and obstacles and challenge for the highest score!

Schulte Grid is an attention training game invented by German psychologist Schulte. The rules are simple: numbers are randomly filled in the grid, and the player needs to find these numbers in order.

Sheep Stack Game is a minimalist card-matching game with many levels to explore. Test your logic and strategy skills and enjoy a fun and relaxing gaming experience.

Classic online Snake game playable via swipe, arrow keys, or on-screen buttons. No download needed—instant fun for relaxation and reflex training.

Play the classic Chinese idiom (Chengyu) solitaire game online! Challenge the AI or yourself by forming a new idiom starting with the last character of the previous one. Features hints and best score tracking. Learn Chinese culture and test your vocabulary.

Free online 'Guess the Number' game! Try to guess a secret number between 1 and 100. Use hints (higher or lower) to adjust your guess and see how many tries it takes. Simple, fun, and suitable for all ages.

Play classic Minesweeper online with three difficulty levels: Beginner (9×9, 10 mines), Intermediate (16×16, 40 mines), and Expert (16×30, 99 mines). Supports flagging, timer, and game history. Works on PC and mobile.

Surround the cat and don't let it escape!

Play the 2048 game online and challenge your logic and math skills. The classic 2048 puzzle game where you move tiles on a grid and merge identical numbers to reach 2048. Supports game revival and local progress recovery.

Free online video trimmer with a drag-and-drop timeline for precise start/end selection. Offers fast lossless trim and frame-accurate re-encode modes. Supports MP4, MOV, MKV, AVI, WebM, FLV, WMV, RMVB and more. All processing runs locally in your browser - no uploads, fully private and secure.

Free online video merger supporting MP4, MOV, AVI, MKV and more. No upload needed—process locally in your browser. Merge multiple videos in order into one file, fast and private.

Free online video muter supporting MP4, MOV, AVI, MKV and more. Remove audio tracks instantly with no quality loss. Batch upload, local processing, keep original codec or re-encode to H.264.

Free online video compressor supporting MP4, MOV, AVI, MKV and more. Batch compress with quality, size, or fast mode. Runs locally in your browser—no upload needed, fast and private.

Free online video converter supporting 14 formats including MP4, MOV, AVI, MKV and WebM. Adjust quality, resolution and frame rate. Runs locally in browser—no server upload, fully private.

Free online video audio extractor. Convert MP4, MOV, AVI, MKV to MP3, AAC, WAV, FLAC & more. Batch processing, no upload needed, all done locally in your browser.

Free online tool to convert MP3, WAV, M4A, FLAC, OGG, AAC and OPUS audio files into MP4 or WebM video. Customize solid color, gradient, or image backgrounds. Set resolution, frame rate and quality. All processing happens locally — no uploads, fully private.

Free online silence remover for MP3, WAV, M4A, FLAC and more. Auto-detect and cut silence segments in bulk. Customize threshold, min duration and keep duration. No installation needed.

Free online audio speed changer supporting MP3, WAV, M4A, FLAC, AAC,AMR & OGG. Adjust speed 0.5x-2.0x with Smart (keep pitch) or Vinyl modes. Batch process locally.

Free online audio compressor supporting MP3, WAV, FLAC, M4A, AAC, OGG inputs. Features smart compression and lossless conversion modes with custom bitrate, sample rate, and channels. Batch process locally in browser to safely reduce file size without uploading.

Free online audio merger: drag & drop MP3, WAV, OGG files, merge in order, and convert to MP3, WAV, FLAC, AAC. All processing happens in-browser—secure and private.

Trim MP3, WAV or FLAC audio online: drag the waveform or type exact start and end times, batch cut files, adjust volume, convert formats, then download each clip or save all as a ZIP.

Free online audio converter supporting MP3, WAV, FLAC, AIFF, OGG, AAC, WMA, OPUS, PCM, AMR and more. Lossless options, batch upload, processed securely in your browser.

Free online audio volume adjuster running locally for privacy. Batch increase or decrease volume (0-500%) for MP3, WAV, FLAC. Features real-time preview, sample rate retention, and zip download. Standard and Natural modes included. Easily fix audio that is too loud or too quiet instantly.

Free online image background remover that erases solid color backdrops (white, blue, red...) and exports a transparent PNG. Add multiple colors to remove, fine-tune tolerance and edge feathering, all processed locally in your browser. Ideal for e-commerce photos, ID photos and logos.

Free online PNG info viewer and editor. Read and modify PNG text chunks, inspect AI prompts and Stable Diffusion parameters, save losslessly, or batch process images into a ZIP.

Online text to image tool that turns your words into styled pictures in real time. Choose fonts, colors, patterns and transparent backgrounds, set width and spacing, then export high-resolution PNG or JPG. Everything runs locally in your browser.

Free online image to text OCR tool that recognizes text from JPG, PNG, WebP images and clipboard screenshots. All processing runs locally in your browser—images are never uploaded. Copy results or download as TXT, ideal for screenshot extraction and document digitization.

Free online ID photo maker with one-click white, blue and red background replacement. Built-in 1-inch, 2-inch and visa sizes, custom dimensions and file size control, plus drag-and-zoom framing. Photos are processed locally in your browser and never uploaded, keeping them private. Best for plain, evenly-colored backgrounds.

View and remove image EXIF data online. Read GPS location, camera, lens, shutter and ISO from JPG, PNG, WebP or HEIC photos, then strip metadata locally in your browser.

Free online GIF maker that converts video clips to GIF or stitches multiple images into an animation. Adjust width, frame rate and looping. Everything runs locally in your browser, so files are never uploaded.

Free online barcode scanner to decode 1D barcodes such as Code 128, EAN-13, UPC and ITF-14 from uploaded images or a live camera, plus QR codes. 100% local processing, private and secure.

Free online image watermark tool. Add text, logo or tile watermarks to photos. Drag to position, batch process up to 20 images, fully client-side, no upload needed.

Free online image format converter with batch upload and one-click conversion. Everything runs locally in your browser—images never leave your device. Convert PNG, JPG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, HEIC with quality, background and max-width options, then download files individually or as a ZIP.

Free online pixel avatar maker with draw, fill, erase and color-pick tools. Includes 6 presets, mirror mode, image import and one-click PNG export.

Free online avatar generator creating pixel, geometric, grid, gradient, and letter style avatars based on your input text. Customize shapes (square or circle) and sizes up to 1024px, then download high-definition PNG images instantly. Perfect for social media, developer placeholders, and personal IDs. Easy to use with randomization features to help you build a unique visual identity quickly.

Looking for a secure online image cropper? Crop, resize, rotate, and flip photos instantly. Supports custom ratios and JPG/PNG/WebP exports. 100% local processing in your browser ensures your privacy is fully protected without uploading files. Try it now!

A professional online batch image compressor and cropper. Supports multi-image upload, free-ratio cropping, rotation, and WebP conversion. All processing is done locally in your browser to ensure absolute privacy. Perfect for creators and developers to optimize images without any installation. Efficiently reduce file size while maintaining quality and batch download in ZIP format.

Free online ICO generator. Convert JPG/PNG/GIF to Favicon.ico. Upload an image, generate standard sizes (16x16, 32x32, 64x64, etc.), and download ICO files instantly for your website or application. No registration required, safe and easy to use.

Free online tool to convert any image into ASCII art. Real-time adjustments for brightness, contrast, dithering, edge detection, and export as plain text or PNG.

Free online tool to generate WiFi QR codes. Enter your WiFi network name (SSID), password, and encryption type (WPA/WEP/No Password) to quickly create a scannable QR code. Easy for guests to connect.

Free online barcode generator supporting CODE128, CODE39, EAN13, EAN8, UPC, ITF and more. Customize width and height, generate and download barcodes as PNG instantly. Ideal for product labels, warehouse logistics and document management.

Free online gradient background generator. Custom linear gradient color & angle, export PNG/WebP/JPG high-res gradient images, copy CSS gradient code, no watermark, no registration.

Free online QR code scanner that reads QR codes from uploaded, dragged or pasted images, and scans them live with your phone camera. Decode text, URLs and links instantly in your browser with no install needed.

An online tool to automatically split images into a 3x3 grid while maintaining the original proportions. Supports multiple formats and bulk download.

Generate placeholder images with customizable dimensions, colors, and text. Perfect for web design, layout demos, and other creative needs.

Free online image resizer. Drag & drop to upload, set custom width and height, maintain aspect ratio, and download resized images instantly. No signup needed.

Free online QR code generator. Enter a URL, text, or contact info to create high-quality QR code images instantly. Add custom captions, download as PNG for link sharing, product labels, business cards, and more.

Image CAPTCHA recognition API.

Free online image stitching tool. Merge multiple images horizontally or vertically. Adjust gap and quality, support transparent PNG. All processing done locally.

Free online National Day avatar maker. Upload your photo and instantly add a five-star red flag frame. Supports WeChat, QQ and more. Multiple styles, one-click download.

Free online tool to add notification badge or unread message dot to your avatar. Supports numbers 1-99+, text labels, round or square style. Download and use as WeChat or QQ profile picture.

Free and easy-to-use online tool for seamless two-way conversion between images and Base64 encoding. Quickly convert your JPG, PNG, GIF, etc., image files to Base64 strings, or decode Base64 data to instantly preview images online. Features drag & drop, one-click copy, and download.

Generate v1, v3, v4, v5, v6, v7, v8, Nil and Max UUIDs in bulk. Set casing, separators or URN, export to JSON, CSV, SQL or Python, and inspect any UUID's version and timestamp.

Turn a local folder or a list of paths into an indented directory tree. Filter names with wildcards, limit depth, then copy the result or save it as a TXT file.

Convert rich text to HTML online. Paste Word or web content, upload images or import DOCX, edit visually, then copy or download clean HTML with optional cleanup options.

Free online LLM chat and API debugger for OpenAI-compatible providers. Enter Base URL and key; the browser connects directly. Supports multi-turn chat, streaming, attachments, and raw JSON debug—data stays local.

Free online WebSocket debugger. Connect to any ws/wss server, send and receive messages in real time, with color-coded logs and built-in JSON formatter. No install needed.

Run any FFmpeg command directly in your browser via WebAssembly. Upload files, type FFmpeg arguments freely, watch real-time logs and download output — no install, no upload to server.

Free online Java compiler and runner. Write, compile, and execute Java code directly in your browser — no JDK needed. Supports stdin, multi-tab, and snippets.

HTML Online Runner enables live webpage preview with code compression, formatting, clear, copy, and download—ideal for quick frontend testing and validation.

This professional time converter tool parses any date string, RFC/ISO code, or Unix timestamp into standard formats. It features auto-timezone detection and over ten output templates, including US English, Chinese, and millisecond precision. Instantly format complex time data with this free, web-based utility designed for developers and data analysts.

A powerful online regex visualizer and text matcher that supports syntax parsing, graphical visualization, matching tests, and result highlighting. Users can export visuals as SVG or images for easy learning and debugging of regular expressions.

Free online camel case converter tool. Convert between camelCase, PascalCase, snake_case, kebab-case and other programming naming formats. Bulk process multiple lines of text, simple operation, improve programming efficiency. Suitable for front-end development, back-end development, database field naming and other scenarios.

Curated list of available Docker image mirrors in China. Solve slow or failed Docker Hub pulls (docker pull) with these reliable Chinese mirror sources. Configure easily on Linux, Windows, or Mac. Regularly updated.

The most comprehensive Android app permissions reference guide. Includes detailed Manifest.xml file permissions, permission management, component declaration and other essential development knowledge. Authoritative reference for enhancing Android app development security and compliance.

The most comprehensive Android Debug Bridge command reference guide. Includes device connection, app management, file transfer, Shell commands and other common ADB operations. Essential tool to enhance Android development, testing and debugging efficiency.

Free online XML Formatter & Compressor tool. One-click to beautify, validate, compress, and optimize your XML code. Supports custom indentation & node folding. Improve readability, reduce file size, and accelerate data transmission.

A powerful online JavaScript (JS) Formatter and Minifier tool. Supports custom indentation (tabs or spaces), code folding, one-click beautification, and efficient compression/obfuscation for your JS scripts. Helps developers improve code readability, reduce file sizes, and optimize website performance.

A powerful online CSS Formatter and Minifier tool. Supports custom indentation (tabs or spaces), code folding/unfolding, line wrapping, one-click beautification, and efficient compression for your CSS stylesheets. Helps developers improve code readability and reduce file sizes.

Run Python online with a growing catalog of installable third-party packages, Matplotlib charts with built-in Chinese fonts, plus virtual file management, preview, and download. Instant browser sandbox for learning, data work, and quick prototypes.

CodeMirror: Theme Preview

Chrome Headless Detection

Online SSE stream debugger for GET/POST requests with custom headers. Features real-time parsing to extract JSON keys, perfect for AI stream APIs. Supports text/raw views to help developers verify Server-Sent Events and HTTP interfaces efficiently.

Free online ASCII art text generator with 298 font styles. Create stylish line text art using characters instantly. Adjust layout, preview all styles, and copy with one click.

Online base conversion tool that supports conversion between bases 2 to 36, including floating-point numbers. Fast, simple, and efficient.

The online regular expression testing tool allows real-time text replacement and generates corresponding regular expression code in multiple programming languages (such as JavaScript, PHP, Python, Java, Go, Ruby).

A powerful online Markdown/HTML converter, supporting bidirectional conversion between Markdown and HTML. Preview conversion results in real-time, easily convert Markdown text to HTML code, or HTML code to Markdown format. Simple to use, efficient and convenient.

Free online Unix timestamp converter. Convert timestamp to date/time or date to timestamp in seconds or milliseconds. Supports 200+ timezones worldwide.

Free online text diff tool to compare two text blocks side by side. Color-coded highlights show additions, deletions, and changes clearly. Supports bidirectional merge for code review and document proofreading.

A powerful online HTML editor with syntax highlighting for HTML, CSS, and JavaScript. Easily format, minify, live preview, copy, and download your web code. Perfect for frontend development and quick HTML testing.

Professional Online JSON Formatter Tool for fast beautification and syntax validation. Features smart auto-fix, and a tree viewer for secure local debugging.

Combine multiple word groups into bulk long-tail keyword lists with custom separators, optional groups, exclusion filtering and dedup. Preview results and export TXT for free SEO keyword research.

Paste page HTML to generate skeleton screen loading code online. It measures the real layout in an isolated preview and outputs responsive skeletons that keep DOM, Flex, Grid, and media queries, plus a fixed-ratio snapshot mode. Customize colors, animation, radius, and ignore selectors; privacy mode keeps no original text.

Free online HTTP response header checker. View status code, all headers, redirect chain and final URL of any site, with security header analysis and Set-Cookie parsing.

Online URL redirect checker that traces full redirect chains, showing each hop status code, location and timing, plus the final landing URL, redirect count and protocol changes for SEO and site debugging.

Free online tool that fetches real-time keyword suggestions from Baidu, Bing, 360, Sogou, Google & Taobao at once. Deduplicate, copy, and export to TXT or CSV — perfect for SEO keyword research and long-tail keyword mining.

Free online screen inspector. Instantly detect screen resolution, viewport size, device pixel ratio (DPR), color depth, HDR support, and screen orientation. Auto-updates on window resize — great for developers and designers.

Free bulk domain availability checker. Check up to 2000 domains at once, query WHOIS info, filter available domains, and export results in TXT or XLSX format.

Free bulk Whois lookup tool. Query up to 200 domains at once with concurrent processing, real-time progress tracking, and one-click Excel export.

Free online Whois lookup tool supporting 1000+ TLDs. Instantly check domain registrar, registration date, expiry date, DNS servers, and registrant info.

Free online User Agent parser to identify browser engine, OS, device model & CPU. Instantly analyze local UA strings and debug mobile or crawler identities.

Professional online IP lookup tool providing real-time global IP geolocation. Support IPv4 searches to display country, province, city, and ISP info instantly. Featuring a friendly interface and dark mode, it is ideal for network diagnosis and security. Enter any IP address now to get detailed geographical data and connection status for free. Accurate, fast, and secure for all users.

SEO Backlink Generator lets you submit bulk backlinks with one click, automatically sending promotion links to many authoritative platforms. It helps newly launched sites get discovered and indexed faster by search engines like Google and Baidu, boosting keyword rankings and visibility. Simple to use with no manual submission needed—an efficient tool for webmasters and site network operators doing SEO promotion.

Free online network port directory with service and protocol notes for common and registered ports. Search by port number or keyword to find what a port is used for—handy for developers, sysadmins, and security checks.

Check the HTTP status code of any URL online and get detailed explanations of all common status codes. A handy diagnostic tool for developers and webmasters to troubleshoot website access issues.

This free online tool automatically refreshes a target webpage to simulate page views, with adjustable refresh count and interval. Ideal for PV testing and basic website traffic checks, easy to use.

Free online escape character converter. Decode \n, \t, \uXXXX sequences into real characters or escape text for JSON and code. Safe, fast and mobile friendly.

A powerful and secure free online tool for AES encryption and decryption. Supports AES-128/256, modes like CBC/ECB, and is OpenSSL compatible. All operations are performed locally in your browser to ensure data privacy.

Free online image steganography tool to hide secret text inside JPG/PNG images invisibly. Supports encrypted embedding and one-click extraction. No install needed.

Our powerful Text Steganography Tool lets you cleverly embed sensitive information within ordinary text for covert communication and secure storage. Extractable only with a specific key, it effectively protects your privacy, secrets, and data security.

Protect your JavaScript code with our online JS obfuscation tool. Supports code compression, variable renaming, string encryption, and more. Ideal for front-end developers and security enthusiasts

Free online MD5 decrypter: enter a 32-character MD5 hash to instantly look up its original text via reverse lookup. One-click copy, for cryptography research and security assessment.

Convert any text into HTML numeric character entities (&#N; format) online. Each character is encoded as its Unicode code point entity. Supports reverse decoding back to plain text.

Free online MD5 hash generator that instantly calculates 32-bit and 16-bit MD5 values in lowercase or uppercase, with one-click copy for every result. Ideal for developers verifying passwords, API signatures and data integrity, all computed locally in your browser.

Free online Morse code translator supporting two-way conversion between text and Morse code. Includes full code table for letters, numbers, and punctuation. Instant results, no registration needed.

Free online tool to convert Chinese text to Unicode escape sequences (\uXXXX) and decode Unicode back to Chinese. Real-time conversion, no installation needed.

Free online URL encoder and decoder. Supports encodeURIComponent and encodeURI modes to convert Chinese text, special characters to URL-safe format or decode percent-encoded strings back to readable text.

Free online Base64 encoder and decoder. Easily convert plain text to Base64 encoding or decode Base64 strings back to original text. Ideal for data transmission, secure storage, and developer debugging. Simple to use, instant conversion.

WeChat Chat Generator makes mock WeChat conversation screenshots online: set names, bubble colors, members and time, add text, image, voice, transfer and red packet, preview iOS/Android, import in bulk and export PNG or long image.

Free Alipay arrival sound generator online. Enter any amount to create the classic payment received voice, with instant playback and WAV download for ringtones, notifications, video dubbing, and pranks.

Free online rainbow fart generator. Enter an optional name, pick short, medium or long length, and create over-the-top compliment essays mixed with sweet talk. Copy the full text for fun, confessions, or playful teasing.

Free online clickbait article generator: enter subject, event, and another take to create shocking headlines and editor-style fluff. Length presets and optional quotes—for fun and parody only, not formal writing.

Free online internet buzzword generator: enter a topic to create long corporate fluff packed with empower, leverage, closed loop, and more. Length presets and industry quotes—for fun and PPT jokes only, not formal writing.

Free online bullshit article generator: enter any topic and instantly create long, profound-sounding but empty funny essays. Length presets, custom size, optional quotes—for entertainment and sharing only, never for formal writing.

Online beast language translator for two-way human and beast text conversion. Includes cat, dog, fox, bird, frog, bear, and ghost voice templates, custom characters, and shareable decode links for chat fun and light text encryption.

Scan nine local browser fingerprints—timezone, language, Chinese fonts and more—for a 0-100 Claude China-environment risk score. Runs entirely in your browser; nothing is uploaded.

SBTI Personality Test is a popular new entertainment-oriented personality test in 2026. It includes 31 interesting questions and in-depth analysis of 15 dimensions. You can get your exclusive personality such as CTRL/SHIT/GOGO with one click. It's fun and accurate. Come and test which personality you are!

The QQ Number Value Evaluator is an intelligent tool that estimates the market value of QQ accounts based on multiple factors such as number length, digit patterns, rarity, and special meanings. It provides detailed analysis, price estimation, and certificate generation.

Calculate your lucky number using 7 methods—birthday, name, zodiac, Chinese zodiac & more—with meanings, lucky days, and shareable cards—free & ad-free.

Calculate earnings per second, minute, and hour with our Real-time Income Calculator. Track income growth live, visualize time's value, and gain financial insights.

Dive into a unique artistic experience with our Dynamic Mona Lisa Circle Art! Transform the timeless masterpiece into a mesmerizing display of sparkling particles and gradient colors through a fun code generator. With responsive design for all devices, expect a new surprise every time you visit. Start your creative digital art journey now!

Let Me Bing That For You builds a shareable Bing tutorial link. Recipients see the query typed and Search clicked, then go to Bing results—handy for teaching people to search themselves.

Struggling to decide what to eat? This random food picker instantly suggests meals for you, covering Chinese cuisine, fast food, breakfast, desserts, and more. Custom dishes supported!

Free online Chinese text shuffler that scrambles character order within words. Customize the shuffle ratio to generate jumbled text for testing reading comprehension and linguistic experiments. Simple, fast, and browser-based.

Free online LED barrage sign tool with fullscreen scrolling or static display. Customize text size, color, background, and effects including neon glow, gradient, blink, and rotation. Perfect for concerts, confessions, and events. Works on mobile and desktop with screen wake lock support.

Free online coin flip simulator. Click to toss a virtual coin and get random heads or tails results instantly. Tracks flip history and supports sound effects for games and decisions.

Let Me Baidu That For You builds a shareable Baidu tutorial link. Recipients see the query typed and 百度一下 clicked, then go to Baidu results—handy for teaching people to search themselves.

Free online truth or dare question bank with 600 truth questions and 424 dare challenges. One-click random draw, perfect for parties, sleepovers and icebreakers. Works on mobile and desktop, continuously updated.

Free online air conditioner simulator. Turn on cooling, heating and fan modes directly on the web. No download needed, enjoy virtual air conditioning anytime anywhere.

Grown-up Baby Age Calculator is a fun and precise tool for time conversion. Simply enter your birth date to instantly see your exact age in months, weeks, days, hours, minutes, and seconds. Whether you are tracking a child's growth or curious about how many seconds you've spent on Earth, this tool provides a detailed digital footprint of your life. After all, we're all just big babies! Try it now!

Book of Answers online – think of your question, close your eyes, then click to reveal a wise answer. A fun, mystical decision tool to help you find clarity when life feels uncertain.

Toolshu browser extension for Chrome, Edge, Firefox and 360 Browser. Access 100+ free online tools instantly from your toolbar. No sign-up needed. Supports EN/ZH/TW.

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