Instant browser tool vs CLI formatter. No install, no setup, no limits.
| Feature | JSON Formatter & Validator | Prettier |
|---|---|---|
| Setup required | ✓ None — works immediately | ✗ Requires installation and configuration |
| Format JSON | ✓ Pretty-print with 2/4 space or tab indent | ✓ Format JSON and other languages |
| Validate JSON | ✓ Syntax check with line/column errors | ✗ Not a validator — only formats |
| Minify JSON | ✓ One-click single-line output | ✗ No minification capability |
| Syntax highlighting | ✓ Color-coded keys, strings, numbers | ✗ Plain text output |
| Works offline | ✓ Yes — after first load | ✓ Yes — after install |
| Copy to clipboard | ✓ One-click copy | ✗ Manual selection required |
| Configurable indent | ✓ 2 spaces, 4 spaces, or tabs | ✓ Configurable via prettier config |
| Privacy | ✓ 100% client-side — data never leaves your device | ✓ 100% local — runs on your machine |
Use the JSON Formatter when you need a quick, no-setup way to format, validate, or minify JSON — perfect for one-off checks, debugging API responses, or validating JSON you received from someone else. Use Prettier when you want to format JSON as part of a larger codebase with automated formatting on save.
Does Prettier validate JSON? No — it reformats valid code. If the JSON has a syntax error, Prettier reports the parse failure but will not point out the exact line and column like a dedicated validator. Do I need Node.js to use Prettier? Yes — Prettier is installed as a Node package, so you need a JavaScript toolchain on the machine. Our tool has no prerequisites: open the page and it runs in the browser.