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About JSONLint
JSONLint is a web editor for checking JSON. You can paste or type JSON, or enter a URL for it to fetch. It then reports syntax errors or reformats the input into readable, indented JSON.
It is handy for debugging API responses, config files and JSON-LD structured data. A separate command-line version, zaach/jsonlint on npm, is a JavaScript port of the service. Its repository has had no activity since 2022, so the website is the actively maintained option.
Strengths
- Validates and pretty-prints in one step
- Accepts pasted JSON or a URL
- Clear syntax error reporting
Limitations
- Syntax checking only on the website, no schema validation
- The related CLI package has not been updated since 2022
Details
- Pricing
- FreeThe website is free to use.
- License
- Proprietary
- Platforms
- Web
- How it runs
- Web application
- Account
- Not required
- Works offline
- No
- Best suited for
- Quickly checking and formatting a JSON snippet
- Categories
- Developer tools, Website testing
- Last verified
- Added
- Provenance
- Selected from the TechWalrus Resource Hub (Website Checkers & Audit Tools); facts checked against the developer's own pages, 2 sources on file.