JSON formatter

Format, minify, and validate JSON with exact error locations.

JSON input

Formatted

{ "id": 1042, "name": "Ada Lovelace", "roles": [ "admin", "editor" ], "active": true, "profile": { "email": "ada@example.com", "joined": "2024-03-18" }, "score": 98.6, "tags": [] }

Valid JSON

Input: 157 B
Output: 214 B; 136% of input
Depth: 3
Keys: 9; 12 values

What it does

Pretty-print with 2 spaces, 4 spaces, or tabs, or minify to one line.
Invalid JSON reports the line and column of the first error.
Optional recursive key sorting for stable, diffable output.

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