Free JSON Formatter
Beautify, validate and minify JSON — plus Base64 and URL encode/decode.
- 100% free
- No sign-up
- Runs in your browser
- Security & developer
How to use the JSON Formatter
- 1 Paste your JSON or text.
- 2 Choose Beautify, Minify, Validate or an encoder.
- 3 Copy the result.
About this tool
Paste JSON from an API response to make it readable, find the exact line of a syntax error, or minify it for production. The same box also encodes and decodes Base64 and URL text.
Frequently asked questions
Is my data sent to a server?
No. Everything runs in your browser, so it is safe for API keys and private data.
Why is my JSON invalid?
The most common causes are trailing commas, single quotes instead of double quotes, and missing quotes around keys. The error message shows the position.
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