JSON Formatter
An open-source Chrome extension that pretty-prints and syntax-highlights raw JSON responses opened in the browser.
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About JSON Formatter
JSON Formatter turns raw JSON pages into a readable, collapsible tree. It adds syntax highlighting, indent guides, dark mode and clickable URLs, and has buttons for switching between the raw and parsed views.
It works on any valid JSON page regardless of the URL. The extension is designed to stay fast on very long JSON documents and to add less than a millisecond of overhead on pages that are not JSON. It suits developers who check API responses directly in the browser.
Strengths
- Collapsible trees with indent guides and syntax highlighting
- Toggle between raw and parsed JSON
- Negligible overhead on non-JSON pages
- Works on any valid JSON page regardless of URL
Limitations
- Built as a Chrome extension; other browsers are not mentioned
- Viewing only, not a JSON editor
Details
- Pricing
- FreeFree and open source.
- License
- Open source, license not stated
- Developer
- Callum Locke
- Platforms
- Browser extension
- How it runs
- Browser extension
- Account
- Not required
- Best suited for
- Developers reading API responses directly in Chrome
- Categories
- Browser tools, Developer tools
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to JSON Formatter
Compare allSoftware that can replace JSON Formatter for an important use case, and what changes if you switch.
JSONLint
An online JSON validator and formatter that tidies and checks pasted or fetched JSON.
JSONLint is a website instead of a Chrome extension, so you paste JSON or give a URL to format and validate it, with clear syntax error reporting.
DevToys
Keep common developer utilities in one desktop application.
DevToys is an open-source desktop app for Windows, macOS and Linux that bundles JSON formatting with other converters and encoders, rather than working inside Chrome pages.
Similar software
Related functionality, not necessarily a direct replacement.
jqp
A terminal user interface for experimenting with jq queries against JSON interactively.
gron
A command-line tool that flattens JSON into discrete assignments so it can be searched with grep.
jo
A small command-line utility that builds JSON objects and arrays from shell arguments.
JSON Schema Validator
An online tool that validates a JSON document against a JSON Schema you paste in.
fq
Queries binary file formats with jq syntax and a structural hex viewer.
IT Tools
Open-source collection of handy encoder, converter and generator utilities.
