JSONLint
- Android app
- Not listed
- Free plan
- No
- Runs on
- Browser extension, Mac, Web
Summary
JSONLint validates and formats JSON in a browser, with a Mac app and Chrome extension also listed. Users can paste or type JSON, or provide a URL containing JSON for retrieval and parsing; the validator reports errors with line numbers. Web tools include minifying, comparison, tree viewing, schema validation, and JSON Path queries. Converters cover JSON and CSV, Excel, SQL, YAML, XML, Java, and Python. JSONLint says browser validation does not send JSON content to its servers for processing. The free Chrome extension adds a collapsible tree, image previews, clickable URLs, timestamps, and export to jsonlint.com; its page says it operates on the client without tracking or collecting data. JSONLint Pro for Mac adds real-time validation, repair of common errors, conversions, tree view, and multi-document tabs. The Mac app works offline on the device and requires macOS 12.0 or later. Its listed price is $6.99 USD once.
Who it is for
JSONLint may suit developers who need to inspect, validate, or convert JSON in a browser. The Mac app is an option for users who need offline work and multi-document tabs.
What is good
- Reports validation errors with line numbers.
- Includes schema validation and JSON Path tools.
- Offers converters for several data formats.
- Mac app works offline and requires no account.
- Free Chrome extension provides a collapsible JSON tree.
What to know first
- Mac app requires macOS 12.0 or later.
- Mac app costs $6.99 USD once.
Verdict
JSONLint covers JSON checks, formatting, comparison, and conversion, with web, extension, and Mac options. Choose the Mac app if offline use or multi-document tabs matter.
JSONLint plans and pricing
All plansCompared on JSON tools
- Free plan
- Yesjsonlint.com
- Schema validation
- Yesjsonlint.com
- JSONPath querying
- Yesjsonlint.com
- JSON diff and compare
- Yesjsonlint.com
- Available platforms
- Web, macOSjsonlint.com
Facts
- Purpose
- JSONLint is a validator and formatter for JSON that accepts pasted or typed code and URLs containing JSON.jsonlint.com · 2 Oct 2026
- Error reporting
- The site says its validator identifies errors and reports their line numbers.jsonlint.com · 2 Oct 2026
- Web tools
- JSONLint lists formatting, minifying, comparison, tree viewing, schema validation, and JSON Path tools.jsonlint.com · 2 Oct 2026
- Conversions
- The site lists converters between JSON and CSV, Excel, SQL, YAML, XML, Java, and Python.jsonlint.com · 2 Oct 2026
- URL input
- Users can supply a URL containing JSON for JSONLint to retrieve and parse.jsonlint.com · 2 Oct 2026
- Privacy
- The privacy policy says JSON validation happens in the browser and JSON content is not sent to JSONLint servers for processing.jsonlint.com · 2 Oct 2026
- Analytics and cookies
- The privacy policy says the site uses Google Analytics and cookies for preferences, analytics, and advertising.jsonlint.com · 2 Oct 2026
- Chrome extension
- The free Chrome extension offers a collapsible JSON tree, image previews, clickable URLs, timestamps, and export to jsonlint.com.jsonlint.com · 2 Oct 2026
- Extension privacy
- The extension page says it operates client-side and does not track or collect data.jsonlint.com · 2 Oct 2026
- Mac app
- JSONLint Pro offers real-time validation, repair of common JSON errors, formatting, conversions, tree view, and multi-document tabs.apps.apple.com · 2 Oct 2026
- Mac app privacy
- The Mac app listing says it works offline on the device and requires no account, analytics, tracking, or internet connection.apps.apple.com · 2 Oct 2026
- Open source engine
- The site says its validator uses @jsonlint/core, which is available to install with npm for use in other projects.jsonlint.com · 2 Oct 2026
Best JSONLint alternatives
See all 20
Where it ranks on Everything Xiaomi
- Best JSON Tools in 2026#13 of 29
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Sources
- jsonlint.com· checked 2 Oct 2026
- jsonlint.com/privacy· checked 2 Oct 2026
- jsonlint.com/json-formatter/chrome-extension· checked 2 Oct 2026
- apps.apple.com/us/app/jsonlint-pro/id6757896437· checked 2 Oct 2026