Developer utility
JSON Formatter
Format, validate, and minify JSON instantly. Everything runs locally in your browser.
Input JSON
0 lines
0 characters
Tab indentation
Result
Your result will appear here
Paste JSON on the left, then choose Format, Minify, or Validate.
0 lines
0 characters
Simple workflow
How to use
No account, upload, or server required. Your JSON stays in this browser session.
1
Paste or open JSONPaste text into the editor or select a local
.json file.2
Choose an actionFormat for readability, Minify for compact output, or Validate for a syntax check.
3
Use the resultCopy the result or download it as a
.json file.FAQ
Common questions
Does my JSON leave my device?
No. Parsing, formatting, validation, and minification are performed locally with your browser's native JSON engine. No backend request is needed.
What happens with invalid JSON?
The tool keeps your input intact and reports the parser error. It does not silently modify invalid data.
Can I format a JSON file?
Yes. Use Open JSON to load a local .json file into the editor, then format or minify it.
What indentation is used?
Formatted output uses two spaces per indentation level for a compact, readable result.