JSON Formatter, Validator & Minifier
Format messy JSON into readable, indented code. Validate for errors and minify for production. The fastest way to work with JSON online.
Most current tools process data directly in your browser. If a tool requires external processing, it will say so clearly.
How to Format JSON Online
- 1Paste your raw or minified JSON into the input area
- 2Click 'Format' to beautify, or 'Minify' to compress
- 3Errors are highlighted with a clear message if JSON is invalid
- 4Copy the formatted JSON with one click
Key Benefits
- Instant validation with detailed error messages
- Choose between 2-space, 4-space, or tab indentation
- Minify JSON to reduce file size for production
- Syntax highlighting for easy reading
Frequently Asked Questions
What is JSON formatting?
JSON formatting (or beautifying) adds proper indentation and line breaks to make JSON human-readable. Minifying does the opposite — removing whitespace to reduce file size.
Why does my JSON show as invalid?
Common issues include trailing commas, missing quotes around keys, single quotes instead of double quotes, or unclosed brackets. The error message will point to the problematic line.
Is my JSON data sent to a server?
No. All JSON processing happens entirely in your browser using JavaScript. Your data never leaves your device.