JSON Formatter & Validator
Format, beautify, minify and validate JSON in one click.
Formatting and validating JSON
JSON is the common text format for exchanging data between web apps and APIs. Minified JSON is compact but unreadable; formatted JSON is easy to inspect. This tool beautifies, minifies and checks it, locally in your browser.
Rules JSON must follow
- Keys and strings use double quotes, not single quotes.
- No trailing commas after the last item.
- Valid values are strings, numbers, true, false, null, arrays and objects.
- Comments are not allowed.
Fixing common errors
An "Unexpected token" message normally points to a missing quote, a stray comma or an unescaped character. Fix the position the validator reports and run it again.
Good habits
Do not paste secrets such as API keys into any online tool you do not control. Use consistent indentation, and validate data before sending it to a server.
Further reading from trusted sources
About This Tool
Format, beautify, minify and validate JSON in one click.
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