Beautify or minify
Format with two spaces, four spaces, or tabs, or create compact JSON.
JSON formatter and validator
Beautify, minify, and validate JSON with precise syntax errors.
Beautify, minify, and validate JSON locally
Paste JSON or drop a .json file, choose an indentation style, and locate syntax errors without uploading content.
Precise error location
Invalid JSON reports the relevant line and column for faster fixes.
Copy and download
Copy the processed text or download it as a JSON file.
JSON formatter FAQ
Is JSON uploaded?
No. File reading, parsing, formatting, and downloads happen locally in the browser.
Does it detect trailing commas?
Yes. Trailing commas are not valid JSON and are reported as syntax errors.
Can it process large files?
Capacity depends on browser memory and device performance, but ordinary config and data files work well.
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