Free JSON Online Validator and Formatter

The fastest, cleanest JSON tool on the web in 2026! Format messy JSON, minify for production, validate syntax errors, and convert between pretty/minified – 100% free forever, no signup, no account, no limits!

✅ 100% Free – Unlimited use, no caps

✅ No Signup or Email Required – Instant results

✅ Beautify / Pretty Print JSON

✅ Minify JSON (remove whitespace)

✅ Validate & highlight errors with line numbers

✅ Supports huge JSON files (up to 10MB+)

✅ Tree view & collapsible nodes

✅ One-click copy & download

Perfect for developers, API testers, frontend/backend engineers, and anyone working with REST APIs, config files, or Postman collections.

How to Format, Minify or Validate JSON (Takes Only 2 Seconds)

1. Paste your raw, minified, or broken JSON
2. Choose action: → Format / Beautify → Minify → Validate Only
3. Fixed & color-coded JSON appears instantly
4. Copy or download with one click!

Start Fixing Your JSON Right Now – 100% Free 

What US Developers Are Saying

“Hands down the best free JSON formatter in 2026 – no forced account!” – Alex, Frontend Dev, New York NY

“Validates giant JSON payloads instantly. Zero signup = pure bliss.” – Rachel, API Engineer, Denver CO