Are comments or trailing commas allowed?

Strict JSON allows neither. The parser reports the location of the first issue it hits.

Is my JSON sent to a server?

No. Parsing and formatting happen in your browser.

Pretty

Minified

Pretty vs minified

Pretty: adds indentation & newlines so a human can read it. Use for debugging, configs, or commit-friendly fixtures.

Minified: strips every byte of whitespace. Use over the wire; it's smaller, gzips well, and parses identically.

Both forms are byte-for-byte equivalent to a JSON parser.

Input

bytes

Output

bytes

Valid JSON

The URL below carries your JSON and settings. Anyone who opens it sees the same input.

Input is too long to include in the URL. Copy the formatted output to share instead.

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Are comments or trailing commas allowed?: Strict JSON allows neither. The parser reports the location of the first issue it hits.
Is my JSON sent to a server?: No. Parsing and formatting happen in your browser.