Developer Tools
JSON Formatter
Pretty-print JSON in your browser with safe parsing and defensive error output.
Characters: 0/20,000 (client-side only).
Please provide JSON text to format.
Input characters
0
Output characters
0
Formatted JSON will appear here.
What this tool does
This tool formats raw JSON into standardized indentation, helps readability, and keeps everything local to your browser.
How to use it
- Paste or type JSON into the input box.
- Use the formatter result in the output panel.
- Copy the formatted JSON for reuse in APIs, docs, or debugging.
Privacy note
Client-side only: we do not upload, store, or transmit your JSON input.
FAQ
Does this upload my JSON?
No. JSON is formatted in your browser only.
Can it handle invalid JSON?
It validates JSON first and returns a clear parse error when the input is invalid.