JSON Formatter
Beautify, minify and validate JSON.
How to use the JSON Formatter
Paste your input
Drop the snippet, token or document into the editor. Invalid characters are highlighted as soon as parsing fails.
Choose how to process it
Select formatting, validation or conversion options. Results are calculated as you type, with no submission step.
Copy or download
Use the copy button for a clean result, or download it when the output is large.
What JSON Formatter is for
Format messy JSON into readable indentation, compress it for transport, or validate it with a precise error message. Sorting keys is optional.
The JSON Formatter is part of the Developer collection on ToolFlow. It is designed for one concrete job: beautify, minify and validate JSON. Everything runs client-side, so you can use it with sensitive material without creating a copy on someone else's server.
Common use cases
- Read a minified API response
- Check a config file
- Shrink a payload
Good to know
- No account is required, and there is no usage limit on the browser tool.
- Processing happens locally. Files are read from disk and the result is written back to your downloads folder.
- Results are reproducible: the same input and options produce the same output, with no hidden server round-trip.
- If the tool needs a live data source, the page states it explicitly instead of silently failing.
JSON Formatter FAQ
The questions people ask before using this tool.