JSON Formatter
Paste your JSON to format, validate, and prettify it. Runs entirely in your browser with strict JSON parsing rules.
Note: This formatter follows strict JSON syntax. Comments, trailing commas, and single-quoted keys/strings are invalid.
Input
Input: 0 lines, 0 chars
Output
Formatted output will appear here...
Output: 0 lines, 0 chars
How To Use
- Paste JSON into the input panel.
- Click Format to prettify or Minify to compress the structure.
- Copy the validated output for API tests, configs, or debugging.
Common Use Cases
- Formatting webhook payloads before sharing with teammates.
- Validating JSON quickly before posting to REST endpoints.
- Minifying large config blocks for compact transport.
How To Use & FAQ
Q: Does this send my JSON to any server?
A: No. Parsing and formatting run entirely in your browser.
Q: Why is my JSON rejected?
A: Common causes are trailing commas, single quotes, or unescaped control characters.
Q: Can I format JSON5 or JavaScript object literals?
A: No. This tool validates strict JSON only. JSON5 features like comments and trailing commas are not supported.
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