How to use this tool
Enter or upload the required information, choose any available options, then run the tool. Review the result and copy or download it when available.
JSON Formatter & Validator
Pretty-print, minify and validate JSON.
FREEBROWSER TOOLNO SIGNUPDEVELOPERS
JSON Formatter & ValidatorPROCESSING IN YOUR BROWSER
Ready.
Private browser processing
This version is designed to run locally in your browser. ToolMint does not need an account for this utility.
What this tool is useful for
Paste JSON to make it easier to read and catch syntax problems. Formatting nested objects and arrays helps with API responses and configuration files.
- Beautify minified JSON
- Check JSON syntax errors
- Inspect API response data
Practical tip
JSON requires double-quoted property names and does not allow trailing commas in standard syntax.
Frequently asked questions
Does formatting change the data?
Formatting should change whitespace and presentation, not the underlying values.
Why is my JSON invalid?
Common causes include missing quotes, extra commas, unmatched brackets or invalid escape characters.
Is pasted JSON uploaded?
This utility is designed to work in the browser.