JSON Formatter / Beautifier
Paste JSON below to format (beautify) or minify it. Copy the result with one click. Everything runs in your browser — nothing is sent to a server.
Formatter controls
Tip: press Ctrl+Enter (or ⌘+Enter) in the input to format.
How it works
Paste JSON into the input box and choose Format / Beautify for indented, readable
output or Minify for a compact single line. The page uses the browser’s built-in
JSON.parse and JSON.stringify — no server round-trip.
If the text is not valid JSON, an error status appears so you can fix trailing commas, quotes, or truncated payloads. Copy puts the output on your clipboard for pasting into an editor or ticket.
A keyboard shortcut (Ctrl/⌘+Enter in the input) triggers format for faster iteration while debugging APIs or config files.
When to use this tool
- Pretty-print API responses or webhook bodies that arrived as one long line
- Minify JSON before embedding it in a demo, README, or size-sensitive payload
- Quickly validate whether a snippet is parseable JSON without opening an IDE
- Share readable JSON in chats or docs while keeping processing on your machine
Tips
- JSON does not allow trailing commas or single-quoted strings — fix those if parse fails
- For huge files, a local editor may be faster; this tool is ideal for medium clipboard pastes
- Clear wipes both panels when you are done with sensitive sample data
Frequently asked questions
Is this JSON formatter free?
Yes. The Formattly JSON Formatter is free to use with no signup required.
Does my JSON leave my browser?
No. Formatting and minifying run entirely in your browser with JavaScript. Your JSON is not uploaded to a server.
Can I minify JSON as well as beautify it?
Yes. Use Format / Beautify for readable indented JSON, or Minify for a compact single-line string.
What if my JSON is invalid?
The tool will show an error message describing the parse problem so you can fix the input and try again.
Does formatting change my data values?
No. Beautify and minify only change whitespace and formatting. Object keys and values stay the same as long as the input is valid JSON.