JSON Formatter & Validator (Private, No Tracking)

Format, beautify, and validate JSON without sending data to third parties. Devkithub runs locally with zero tracking or logging, so your payloads stay private while you get instant linting, consistent indentation, and quick fixes.

What you get (developer-grade)

• Local-only execution: no uploads, no telemetry, works even offline.
• Precise validation: line/column errors with quick hints for missing braces/quotes.
• Flexible output: pretty-print for reviews, minify for payload size, canonical ordering for stable diffs.
• Team-ready: copy/download, stable formatting for docs, configs, API mocks, and CI fixtures.

Quickstart (1 minute)

1. Paste or drop your JSON.
2. Fix any highlighted errors (line/column shown inline).
3. Choose Pretty or Minified; toggle canonical ordering if you need stable diffs.
4. Copy or download the cleaned JSON.

Formatter vs beautifier (practical view)

• Beautifier → readability for reviews and docs.
• Formatter → deterministic structure for CI and PR diffs.
• Minify → smallest payloads for production or perf testing.

Examples

Before

{"user":{"id":1,"name":"Ada","roles":["admin","dev"]},"active":true}

After

{
  "user": {
    "id": 1,
    "name": "Ada",
    "roles": ["admin", "dev"]
  },
  "active": true
}

Real-world workflows

• Clean API responses before sharing in tickets or docs.
• Validate config files and secrets without uploading them.
• Generate stable fixtures/snapshots for tests.
• Trim payload size for perf-sensitive endpoints.

Privacy-first promise

This tool is part of DevKitHub, our private, developer-first platform that provides premium utilities fully locally executed, with zero tracking, zero logging and full privacy by design.

Open it inside DevKitHub to unlock offline mode, batch formatting, keyboard shortcuts, and faster copy/download.