10 Best JSON Viewer Tools To Format JSON Strings (2026 Update)
JSON is a lightweight, text-based open standard designed for human-readable data interchange. It is a very simple format consisting of key-value pairs.
JSON format has become one of the most popular formats for data exchange between web services and clients, especially in single-page applications.
JSON representation of various business objects and data has already become a crucial aspect of modern web development, be it for mobile apps or websites.
No matter how convenient, effective, and scalable its structure appears to be, a developer needs a proper JSON viewer tool in hand to format and visualize JSON strings with ease.
If you are dealing with JSON data but aren't sure what it contains, it can be very useful to review your data using a JSON viewer.
So here you have top 10 of the best JSON viewer tools you can use to format & convert JSON data to a human-readable view. Enjoy.
Originally Published July 24 2020, updated Dec 16 2025
Table of contents:
Best jQuery JSON Viewer Tools
jQuery Plugin For Easily Readable JSON Data Viewer
Yet another jQuery JSON viewer plugin which renders JSON objects in HTML with support for syntax highlighting and collapsible/expandable navigation.
Features:
- Syntax highlighting
- Collapse and expand child nodes on click
- Clickable links
- Easily readable and minimal DOM structure
- Optional support for libraries supporting big numbers
Display JSON Data As A Checkable Tree - jQuery jsontree.js
A tiny and user-friendly JSON manipulation and visualization jQuery plugin for rendering complex JSON data in an interactive, collapsible, checkable tree.
Format JSON Data With Colored Syntax - pretty-print-json
A web-based tool used to format/beautify JSON data and colorize key/value pairs depending on the data type.
Beautiful JSON Viewer With Callback Support - jQuery JVC
A feature-rich JSON viewer plugin that transforms JSON objects, strings, and arrays into a beautifully structured, collapsible/expandable tree structure.
JSON Viewer With Path Selection - JSON Path Picker
A jQuery based JSON viewer & path picker to render your JSON data in a tree structure where you can get the path to each key by clicking on the output icon.
Features:
- Collapsible nodes.
- Keys with/without quotes.
- Dot or Bracket notation in the path.
- Allows you to replace keys using Regx.
- Syntax highlighting.
Best Vanilla JS JSON Viewer Tools
Render JSON Data As A Tree View – json-view
Yet another JSON viewer library that renders your JSON data as a collapsible and expandable tree structure for better readability.
Visualize JSON Data Like A Pro With JSONTree.js
A tiny JavaScript JSON tree library that allows developers to visualize complex JSON data through a customizable, interactive tree view.
Features:
- Zero-dependencies and extremely lightweight!
- 100% TypeScript, allowing greater support for React, Angular, and other libraries!
- Full API available via public functions.
- 52 language translations available!
- Fully styled in CSS/SASS, fully responsive, and compatible with the Bootstrap library!
- Full CSS theme support (using :root variables), with dark and light themes.
- 22 data types supported by default (such as Object, Array, primitive types, and even Sets, Maps, and HTML DOM elements).
- Custom data types support.
- Import and convert CSV and HTML files to JSON!
- Support to show the data types, array/object sizes, comas, and opening/closing symbols!
- Fully configurable per DOM element!
- Close and open all objects, arrays, sets, maps, and HTML objects.
- Clickable values via custom triggers!
- Custom value rendering.
- Array paging, with configurable column count support (show array objects on different pages)!
- Compare the property name and index values in multiple page columns!
- Drag & Drop JSON, CSV, and HTML files support!
- Copy to clipboard (all JSON, a specific page, a specific JSON value, or selected JSON values).
- Full editing support (double click a value, property, index, or anywhere for everything).
- Keyboard navigation keys support!
- Toggle between regular and full-screen views.
- Assign tooltips to any JSON value!
- Show value/key memory sizes, page numbers, and status updates in the footer!
Minimal JSON Data Formatter – JSONViewer
A super lightweight, pure JavaScript JSON formatter / viewer which helps render JSON objects just like a collapsible tree view.
Beautiful JSON Rendering In Pure JavaScript – JSON Formatter
JSON Formatter is a pure JavaScript plugin used for rendering local JSON objects and/or external JSON files in an elegant way (just like the collapsible tree structure).
Collapsible JSON Viewer with Syntax highlighting and Line numbers – TreeJSON
TreeJSON is a lightweight interactive JSON viewer that renders JSON data into a collapsible tree structure.
It takes raw JSON data and converts it into a human-readable tree view with syntax highlighting, line numbers, and error detection.
Features:
- Syntax highlighting for keys, strings, numbers, booleans, null values
- Nested collapsible tree structure with click-to-expand functionality
- Auto-updating line numbers that hide/show with collapsed content
- Specific error line highlighting for malformed JSON
- Fully responsive design that works on mobile devices
- 100% vanilla JS – no frameworks or external dependencies
More Resources:
We hope that, by reading this article, you will be able to get a better idea of how JSON viewers can be used on your website and why they are so important. If you know of any other ways in which the above JSON viewer tools can help your web development projects, do let us know in the comments section below. We would love to hear from you!
Looking for more jQuery plugins or JavaScript libraries to create JSON Viewer Tools on the web & mobile? See jQuery JSON Viewer and JavaScript JSON sections for more details.
See Also:
- 10 Best Online JSON Data Converters In JavaScript
- 10 Best Form Builder Plugins To Generate Forms From JSON Data
- 5 Best React Based JSON Viewer To Help View & Edit JSON Data
