Null IDE

Cross-Platform Security-Focused Code Editor

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📥 Download & Install

Go to Releases to download Null IDE

Linux (Flatpak)

1. Go to Releases
2. Download the latest .flatpak file
3. Install:

flatpak install --user Null-IDE-*.flatpak

4. Run:

flatpak run com.nullide.app

Update

Download the latest release from Releases and install again.

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About

Null IDE is a code editor designed for security researchers, penetration testers, and software developers. It integrates 120+ security tools with a full-featured development environment.

Key Features

• 120+ Security Tools - Network scanning, web security testing, cryptography utilities
• Monaco Editor - VS Code editing engine with 112 language support
• Dual Mode Interface - Code mode for development, Utility mode for security tools
• Integrated Terminal - Multi-tab terminal with bash/zsh/powershell support
• Discord Rich Presence - Activity display integration
• Cross-Platform - Windows, Linux, macOS support
• VS Code-like File Explorer - Create files/folders, rename, delete, context menu

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Security Tools

Network Security

Tool	Description
Port Scanner	TCP/UDP port scanning with service detection
DNS Analyzer	DNS enumeration and zone transfer testing
Subdomain Finder	Subdomain discovery and attack surface mapping
WHOIS Lookup	Domain registration and reconnaissance data
Reverse DNS	IP to domain resolution
BGP Scanner	BGP route hijacking detection
ARP Scanner	ARP spoofing attack analysis
VNC Scanner	VNC authentication bypass testing
RDP Scanner	RDP vulnerability detection
FTP Scanner	FTP anonymous access testing
SMB Scanner	SMB share enumeration and vulnerability detection
SNMP Scanner	SNMP community string testing
LDAP Scanner	LDAP/AD anonymous bind testing

Web Security

Tool	Description
SQL Injection Tester	Automated SQL injection detection
XSS Detector	Cross-site scripting vulnerability scanner
SSRF Tester	Server-side request forgery testing
XXE Tester	XML external entity injection
SSTI Detector	Server-side template injection
LFI/RFI Scanner	Local/remote file inclusion testing
CSRF Tester	Cross-site request forgery testing
Command Injection	OS command injection testing
Open Redirect Scanner	Open redirect vulnerability detection
Clickjacking Tester	X-Frame-Options and CSP testing
Cookie Analyzer	Cookie security flags analysis
Header Analyzer	HTTP security headers analysis
IDOR Tester	Insecure direct object reference testing
Path Traversal	Directory traversal vulnerability scanner
CRLF Injection	HTTP response splitting testing
DOM XSS Scanner	DOM-based XSS analysis
CSP Bypass	Content Security Policy analyzer
HSTS Checker	HSTS validation and preload status
HTTP Method Tester	Dangerous HTTP method testing
Host Header Injection	Host header attack testing
Cache Poisoning	Web cache poisoning scanner
Race Condition Tester	Concurrent request vulnerability testing
Deserialization Scanner	Unsafe deserialization detection
Prototype Pollution	JavaScript prototype pollution testing
WebSocket Security	WebSocket security testing
HTTP/2 Scanner	HTTP/2 vulnerability detection

Authentication & API Security

Tool	Description
JWT Decoder	JWT token analysis
JWT Cracker	Weak JWT secret brute forcing
JWT Algorithm Confusion	JWT algorithm confusion attack testing
JWT Weak Secret	JWT secret strength analysis
OAuth Tester	OAuth flow testing
OAuth 2.0 Scanner	OAuth 2.0 security flaw detection
SAML Scanner	SAML assertion validation
Authentication Bypass	Auth bypass vulnerability testing
Authorization Bypass	IDOR and path traversal testing
Session Management	Session security analysis
API Key Scanner	Exposed API key detection
API Rate Limit Tester	Rate limiting protection testing
GraphQL Scanner	GraphQL introspection and security
Password Policy Checker	Password strength analysis

Cloud & Infrastructure

Tool	Description
Cloud Metadata	AWS/Azure/GCP metadata endpoint testing
S3 Scanner	S3 bucket permission testing
Docker Scanner	Exposed Docker API detection
Kubernetes Scanner	K8s API unauthorized access testing
Redis Scanner	Redis unauthorized access testing
MongoDB Scanner	MongoDB authentication bypass testing
Elasticsearch Scanner	Elasticsearch exposure detection
Memcached Scanner	Memcached exposure and amplification testing
etcd Scanner	etcd key-value store exposure
Consul Scanner	Consul API exposure testing

Cryptography

Tool	Description
Hash Generator	MD5, SHA-1, SHA-256, SHA-512 generation
Hash Cracker	Hash dictionary attack
Cipher ID	Encryption algorithm identification
RSA Analyzer	RSA key strength analysis
Padding Oracle	Padding oracle attack testing
Hash Extension	Hash length extension attack
Crypto Address	Cryptocurrency address validation
Steganography Detector	Hidden data detection in images
Randomness Analyzer	PRNG quality testing

Encoding & Utilities

Tool	Description
Base64 Encoder/Decoder	Base64 encoding and decoding
URL Encoder/Decoder	URL encoding and decoding
HTML Entity Encoder	HTML entity encoding
JSON Formatter	JSON formatting and validation
Regex Tester	Regular expression testing
UUID Generator	UUID/GUID generation
Timestamp Converter	Unix/ISO timestamp conversion
Color Converter	HEX/RGB/HSL conversion
Diff Viewer	Text comparison tool
Markdown Preview	Live markdown rendering
Lorem Ipsum Generator	Placeholder text generation
Slug Generator	URL slug generation
Cron Generator	Cron expression builder

Payload Generation

Tool	Description
Reverse Shell Generator	Multi-language reverse shell payloads
Web Shell Generator	PHP/ASP/JSP web shells
Code Obfuscator	JavaScript/PowerShell obfuscation

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Keyboard Shortcuts

Action	Shortcut
Save File	Ctrl+S
Close Tab	Ctrl+W
Close All Tabs	Ctrl+Shift+W
Next Tab	Ctrl+Tab
Previous Tab	Ctrl+Shift+Tab
Toggle Left Sidebar	Ctrl+B
Toggle Right Sidebar	Ctrl+Shift+B
Toggle Terminal	Ctrl+`
Settings	Ctrl+,

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Supported Languages

Null IDE supports syntax highlighting for 112 programming languages including:

Mainstream: JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Rust, PHP, Ruby, Swift, Kotlin, Scala, Perl, Lua, R, SQL

Web: HTML, CSS, SCSS, SASS, LESS, XML, JSON, YAML, Markdown

Systems: Assembly (x86, x64, ARM), Rust, Zig, V, Odin, Nim

Functional: Haskell, OCaml, F#, Elm, PureScript, Idris, Clojure, Scheme, Racket, Erlang, Elixir

Niche: Fortran, COBOL, Pascal, Ada, Julia, Dart, Groovy, Prolog, Forth, APL, Solidity, Move, Cairo, Carbon, Mojo, and 60+ more.

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License

Custom License - All Rights Reserved

Copyright (c) 2026 4fqr

• ✅ Free for personal, educational, and non-commercial use
• ❌ Commercial redistribution prohibited
• ❌ Reselling prohibited
• ❌ Rebranding prohibited

Official distribution only at:

• https://github.com/4fqr/null-ide
• https://github.com/4fqr/null-ide/releases

Downloads from other sources are unauthorized.

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Support

Report issues at GitHub Issues