JSON Formatter
Paste raw JSON and get clean, validated, and beautifully indented output. Detects errors with line numbers.
JSON Formatter & Validator
Paste raw JSON to instantly validate, format, and pretty-print it.
Paste JSON on the left to validate and format.
How to use JSON Formatter
- 1
Paste your JSON
Drop raw, minified, or messy JSON into the input panel. The validator runs as you type.
- 2
Pick an indent
Choose 2 spaces (default), 4 spaces, or minify to a single line.
- 3
Review the output
Valid JSON is pretty-printed instantly. Invalid JSON shows the exact error with line and column.
- 4
Copy or download
Copy to your clipboard or download a .json file — your data never leaves your browser.
About JSON Formatter
Paste raw JSON and get clean, validated, and beautifully indented output. Detects errors with line numbers.
Use JSON Formatter when you need to format, validate & beautify json. Review the available options in the interface, process your input, and check the result before saving or copying it.
Frequently asked questions
No. The JSON Formatter runs entirely in your browser using JSON.parse — your data never leaves your device.