JSON formatter and minifier

Format, minify, and validate JSON locally in your browser.

Runs locally in your browser. Payloads, schemas, expressions, and generated output stay on your device.

Valid JSON

JSON input

JSON

{
  "project": "json park",
  "private": true,
  "tools": ["format", "view", "diff"]
}

Output

JSON

{
  "project": "json park",
  "private": true,
  "tools": ["format", "view", "diff"]
}

Common uses

Format compact API responses into readable JSON.
Minify fixtures before pasting them into docs, tests, or configs.
Find syntax errors with line and column detail before a payload leaves your browser.

Details

Does the formatter upload my JSON?

No. Formatting, minifying, and validation happen in your browser through the local JSON worker.

What happens when JSON is invalid?

The workbench keeps the payload local and shows the parse error location so you can fix the source text.

Private by default

The current tool runs in your browser. Payloads, schemas, expressions, and generated output are not sent to jsonpark.com, Supabase, Turnstile, or analytics.