Developer Tools

JSON Formatter

Format and pretty-print JSON with 2 or 4 space indentation — validates while formatting.

About the JSON Formatter

The JSON Formatter parses your JSON (validating it in the process) and re-serializes it with clean indentation — 2 or 4 spaces. Syntax errors are reported with the engine's exact message.

No — parsing happens in your browser with the native JSON engine.

No, JavaScript preserves object key insertion order when re-serializing.

Related tools

JSON MinifierMinify JSON to a single compact line — removes all whitespace, shows size savings.JSON ValidatorValidate JSON syntax online — precise engine error messages for the first problem found.CSV to JSON ConverterConvert CSV data to a JSON array of objects — auto-detects comma, semicolon or tab delimiter.Redirect CheckerTrace every hop: 301, 302, meta refresh and JavaScript redirects — with timing, HTTPS and loop detection.