JSON Formatter & Validator
Pretty-print, minify and validate JSON with helpful error positions.
About the JSON Formatter & Validator
JSON Formatter & Validator pretty-prints messy JSON, minifies it for production, or quickly validates the structure and reports the first error — all entirely in your browser using the native JSON.parse.
How to use
- Paste your JSON into the editor.
- Choose 2-space, 4-space or tab indentation.
- Click Format, Minify or Validate.
Benefits & key features
- Native JSON.parse means zero library surprises.
- Error messages include the position of the problem.
- Works for API payloads up to several megabytes.
- Copy-to-clipboard and count-of-keys/items stats built in.
Pro tip
For complex schemas, follow up with a JSON-Schema linter. This tool confirms it's parseable JSON; schema tools confirm the shape is correct.