JSON Formatter

Tracking since Apr 1, 2026.

Changelog

• Jun 4, 2026
  description

  JSON Formatter automatically formats and prettifies JSON in Chrome. It comes with support for syntax highlighting and over 60 themes. It also makes links clickable automatically and has multiple modes to view JSON, including Parsed Mode, Formatted Raw Mode, and Raw Mode.
  
  You can toggle between modes using shortcut keys:
  
  Parsed Mode: P key
  Formatted Raw Mode: Shift + R key
  Raw Mode: R key
  Collapse All: [ Key
  Expand All: ] Key
  Toggle Dark Mode: D key
  Toggle Toolbar: T key
  
  Features:
  ● Over 60 themes for both light and dark mode
  ● Syntax highlighting
  ● Works offline
  ● No tracking or analytics
  ● Word wrapping and sorting order to stay organized
  ● Works with any JSON webpage
  ● Makes links clickable
  ● Formats JSON automatically
  ● Raw, Formatted Raw, and Parsed Mode
  ● Remembers theme preferences
  ● Shortcut keys for ease of use
  ● Collapsible toolbar
  
  Note: By default, the extension theme is "System Default." It will change according to your browser's theme. If you want it to be the theme of your choice, you have to set it from the "Extension Settings" or "Extension Options."
  
  To change the default formatting option and other settings, set your desired option in the extension settings.
  
  To make JSON Formatter work properly on all kinds of sites, in the extension permissions, change "Allow this extension to read and change all your data on websites you visit" from "On Click" to "On all sites," if not already set.
  
  To use JSON Formatter in local files, enable "Allow access to file URLs" in the extension settings.
  
  To use JSON Formatter in Incognito mode, enable "Allow in Incognito" in the extension settings.
  
  Some URLs to test on:
  - https://api.github.com/users
  - https://microsoftedge.github.io/Demos/json-dummy-data/64KB.json
  - https://raw.githubusercontent.com/mxstbr/markdown-test-file/refs/heads/master/TEST.md
  - https://raw.githubusercontent.com/mdn/learning-area/refs/heads/main/javascript/introduction-to-js-1/assessment-finished/main.js
  
  Source code:
  https://github.com/arnav-kr/json-formatter/
  
  Bug reports and suggestions:
  https://github.com/arnav-kr/json-formatter/issues
  
  Changelog:
  https://github.com/arnav-kr/json-formatter/blob/main/CHANGELOG.md

  JSON Formatter automatically formats and prettifies JSON in Chrome. It comes with support for syntax highlighting and over 60 themes. It also makes links clickable automatically and has multiple modes to view JSON, including Parsed Mode, Formatted Raw Mode, and Raw Mode.
  
  You can toggle between modes using shortcut keys:
  
  Parsed Mode: P key
  Formatted Raw Mode: Shift + R key
  Raw Mode: R key
  Collapse All: [ Key
  Expand All: ] Key
  Toggle Dark Mode: D key
  Toggle Toolbar: T key
  
  Features:
  ● Over 60 themes for both light and dark mode
  ● Syntax highlighting
  ● Works offline
  ● No tracking or analytics
  ● Word wrapping and sorting order to stay organized
  ● Works with any JSON webpage
  ● Supports excluding domains from formatting
  ● Makes links clickable
  ● Formats JSON automatically
  ● Raw, Formatted Raw, and Parsed Mode
  ● Remembers theme preferences
  ● Shortcut keys for ease of use
  ● Collapsible toolbar
  
  Note: By default, the extension theme is "System Default." It will change according to your browser's theme. If you want it to be the theme of your choice, you have to set it from the "Extension Settings" or "Extension Options."
  
  To change the default formatting option and other settings, set your desired option in the extension settings.
  
  To make JSON Formatter work properly on all kinds of sites, in the extension permissions, change "Allow this extension to read and change all your data on websites you visit" from "On Click" to "On all sites," if not already set.
  
  To use JSON Formatter in local files, enable "Allow access to file URLs" in the extension settings.
  
  To use JSON Formatter in Incognito mode, enable "Allow in Incognito" in the extension settings.
  
  Some URLs to test on:
  - https://api.github.com/users
  - https://microsoftedge.github.io/Demos/json-dummy-data/64KB.json
  - https://raw.githubusercontent.com/mxstbr/markdown-test-file/refs/heads/master/TEST.md
  - https://raw.githubusercontent.com/mdn/learning-area/refs/heads/main/javascript/introduction-to-js-1/assessment-finished/main.js
  
  Source code:
  https://github.com/arnav-kr/json-formatter/
  
  Bug reports and suggestions:
  https://github.com/arnav-kr/json-formatter/issues
  
  Changelog:
  https://github.com/arnav-kr/json-formatter/blob/main/CHANGELOG.md

• May 1, 2026
  description

  JSON Formatter automatically formats and prettifies JSON in Chrome. It comes with support for syntax highlighting and over 60 themes. It also makes links clickable automatically and has multiple modes to view JSON, including Parsed Mode, Formatted Raw Mode, and Raw Mode.
  
  You can toggle between modes using shortcut keys:
  
  Parsed Mode: P key
  Formatted Raw Mode: Shift + R key
  Raw Mode: R key
  Collapse All: [ Key
  Expand All: ] Key
  Toggle Dark Mode: D key
  Toggle Toolbar: T key
  
  Features:
  ● Over 60 themes for both light and dark mode
  ● Syntax highlighting
  ● Works offline
  ● No tracking or analytics
  ● Word wrapping and sorting order to stay organized
  ● Works with any JSON webpage
  ● Makes links clickable
  ● Formats JSON automatically
  ● Raw, Formatted Raw, and Parsed Mode
  ● Remembers theme preferences
  ● Shortcut keys for ease of use
  ● Collapsible toolbar
  
  Note: By default, the extension theme is "System Default." It will change according to your browser's theme. If you want it to be the theme of your choice, you have to set it from the "Extension Settings" or "Extension Options."
  
  To change the default formatting option and other settings, set your desired option in the extension settings.
  
  To make JSON Formatter work properly on all kinds of sites, in the extension permissions, change "Allow this extension to read and change all your data on websites you visit" from "On Click" to "On all sites," if not already set.
  
  To use JSON Formatter in local files, enable "Allow access to file URLs" in the extension settings.
  
  To use JSON Formatter in Incognito mode, enable "Allow in Incognito" in the extension settings.
  
  Some URLs to test on:
  - https://api.github.com/users
  - https://microsoftedge.github.io/Demos/json-dummy-data/64KB.json
  - https://raw.githubusercontent.com/mxstbr/markdown-test-file/refs/heads/master/TEST.md
  - https://raw.githubusercontent.com/mdn/learning-area/refs/heads/main/javascript/introduction-to-js-1/assessment-finished/main.js
  
  Source code:
  https://github.com/jformatter/json-formatter-crx/
  
  Bug reports and suggestions:
  https://github.com/jformatter/json-formatter-crx/issues
  
  Changelog:
  https://github.com/jformatter/json-formatter-crx/blob/main/CHANGELOG.md

  JSON Formatter automatically formats and prettifies JSON in Chrome. It comes with support for syntax highlighting and over 60 themes. It also makes links clickable automatically and has multiple modes to view JSON, including Parsed Mode, Formatted Raw Mode, and Raw Mode.
  
  You can toggle between modes using shortcut keys:
  
  Parsed Mode: P key
  Formatted Raw Mode: Shift + R key
  Raw Mode: R key
  Collapse All: [ Key
  Expand All: ] Key
  Toggle Dark Mode: D key
  Toggle Toolbar: T key
  
  Features:
  ● Over 60 themes for both light and dark mode
  ● Syntax highlighting
  ● Works offline
  ● No tracking or analytics
  ● Word wrapping and sorting order to stay organized
  ● Works with any JSON webpage
  ● Makes links clickable
  ● Formats JSON automatically
  ● Raw, Formatted Raw, and Parsed Mode
  ● Remembers theme preferences
  ● Shortcut keys for ease of use
  ● Collapsible toolbar
  
  Note: By default, the extension theme is "System Default." It will change according to your browser's theme. If you want it to be the theme of your choice, you have to set it from the "Extension Settings" or "Extension Options."
  
  To change the default formatting option and other settings, set your desired option in the extension settings.
  
  To make JSON Formatter work properly on all kinds of sites, in the extension permissions, change "Allow this extension to read and change all your data on websites you visit" from "On Click" to "On all sites," if not already set.
  
  To use JSON Formatter in local files, enable "Allow access to file URLs" in the extension settings.
  
  To use JSON Formatter in Incognito mode, enable "Allow in Incognito" in the extension settings.
  
  Some URLs to test on:
  - https://api.github.com/users
  - https://microsoftedge.github.io/Demos/json-dummy-data/64KB.json
  - https://raw.githubusercontent.com/mxstbr/markdown-test-file/refs/heads/master/TEST.md
  - https://raw.githubusercontent.com/mdn/learning-area/refs/heads/main/javascript/introduction-to-js-1/assessment-finished/main.js
  
  Source code:
  https://github.com/arnav-kr/json-formatter/
  
  Bug reports and suggestions:
  https://github.com/arnav-kr/json-formatter/issues
  
  Changelog:
  https://github.com/arnav-kr/json-formatter/blob/main/CHANGELOG.md

Permissions & access

Permissions

storageunlimitedStorage

Host access

*://*/*, <all_urls>

Screenshots

Similar extensions

Alternatives to JSON Formatter, ranked by description similarity.

JSON Formatter

The most beautiful and customizable JSON / JSONP highlighter, makes JSON / JSONP easy to read. Open source.

49

JSON Formatter & Viewer for Chrome

JSON Formatter & Beautifier for Chrome.

222

json-prettifier

prettify json

—

JSON Formatter by Code Architecture

Dark theme JSON formatter with Tree and Table views. Automatically formats JSON with syntax highlighting and navigation.

6

★ 5.0

JSON Formatter - Simple & Clean

Automatically formats JSON responses in the browser with themes, collapsible nodes, and other helpful features.

7

★ 5.0

JSON Formatter - Beautify & Validate

Format, beautify & validate JSON with syntax highlighting.

2

JSON Formatter Everywhere

Automatically formats JSON responses in any tab, not just raw JSON pages.

3

JSON Viewer

Most aesthetic & customizable JSON/JSONP viewer with themes, custom search, syntax highlighting/checking & copy features.

6.0K

★ 4.8