JSON Formatter & Validator
Paste JSON to validate and pretty-print it, or minify it to one line.
How to use
- Paste your JSON.
- Choose indentation, or minify.
- Copy the formatted output. Errors are shown inline.
Frequently asked questions
Is my JSON sent to a server?
No. Parsing and formatting run entirely in your browser, so it is safe for sensitive data.
Last reviewed: 2026-01-01