Format and Validate JSON with Developer Tools

Readable JSON is not optional

Minified payloads hide missing commas, trailing characters, and bad nesting. A good formatter and validator turn cryptic errors into actionable line hints—saving deploys, API tests, and on-call hours.

Open tools: JSON Formatter · JSON Validator · Developer hub

Everyday triggers

• Swagger / OpenAPI responses pasted into Slack—format before you diff.
• CI fails on “unexpected token”—validate locally first.
• Translating API payloads to CSV? Pair with data utilities.

Step-by-step

1. Paste JSON into JSON Formatter and prettify with consistent indentation.
2. Run JSON Validator when you need a hard pass/fail with error location.
3. Copy or download—nothing is stored for training or ads.

More in Developer Tools

• Base64 encode/decode, JWT decode, hash generators, UUIDs, regex tester, HTML/CSS/SQL formatters.
• Everything is designed for quick clipboard workflows—paste, transform, copy back.

Related: CSV ⇄ JSON guide · Request a dev tool