JSON Formatter
Format, minify, validate, sort, and inspect JSON directly in your browser.
Format, minify, validate, sort, and inspect JSON directly in your browser.
Your JSON is processed locally in the browser. Nothing is uploaded or stored.
Yes. Formatting, validating, minifying, and sorting all run entirely in your browser — your JSON is never sent to a server, uploaded, or stored anywhere. The same client-side approach applies to security-sensitive tools like Hash Generator, Bcrypt Hash, AES Encrypt/Decrypt, and RSA Key Pair Generator, where it matters even more.
Formatting (pretty-printing) rewrites JSON with consistent indentation so it's readable, without changing the data. Validating checks that the JSON is syntactically correct. This tool does both, plus minify and sort keys.
The most common causes are a trailing comma after the last item, single quotes instead of double quotes, and unquoted object keys — none of those are valid in strict JSON. The error message points to the exact line and character.
Yes — JSON and YAML represent the same kind of data with different syntax, and either direction is a one-click conversion. Open JSON ↔ YAML Converter
Paste both versions into JSON Diff to see exactly what was added, removed, or changed. Open JSON Diff
Use the JSON Schema Validator to check data against a JSON Schema (draft 2020-12), not just that it's syntactically valid. Open JSON Schema Validator