JSON Formatter & Validator
Beautify, minify and validate JSON instantly — right in your browser.
- No upload
- Browser-based
- Free
- No signup
- Text
Runs in your browser. Your text never leaves your device.
Frequently asked questions
- Is my JSON uploaded anywhere?
- No. The JSON formatter runs entirely in your browser using the built-in JSON engine. Your data never leaves your device and nothing is sent to a server.
- What does minify do?
- Minify removes all whitespace and line breaks to produce the smallest valid JSON, which is useful for saving space or embedding JSON in code.
- Why does it say my JSON is invalid?
- The tool reports the exact line and column of the first syntax error. Common causes are trailing commas, single quotes instead of double quotes, or missing brackets.