JSON Formatter
Format, validate, and minify JSON.
About this tool
Messy one-line JSON from an API is hard to read and easy to break. This free JSON formatter pretty-prints, minifies, and validates JSON. Paste a response body, config snippet, or webhook payload to spot missing commas, bad quotes, or nesting errors before you ship. Use it alongside your editor whenever you need a quick sanity check.
How to use
- Paste raw JSON into the editor (or load a small snippet from your clipboard).
- Run format/beautify to indent nested objects and arrays.
- Fix any validation errors highlighted in the output or message area.
- Optionally minify when you need a compact single-line payload.
- Copy the cleaned JSON back into your API client, file, or codebase.
Features
- Pretty-print with readable indentation
- Minify to a compact single line
- Inline validation / parse error feedback
- Free to use—no account
Notes
- Not a full schema validator (JSON Schema)
- Comments (JSONC) are not accepted as-is
- Extremely large files may hit browser memory limits
Frequently asked questions
Yes. Invalid JSON will surface a parse error so you can fix syntax before pretty-printing. Valid input formats with consistent indentation.