JSON Formatter & Validator
Paste JSON below to beautify, minify, or validate it. Nothing is uploaded — everything runs in your browser.
Ad placeholder — replace with your AdSense unit once approved
How this works
This tool parses your JSON with the browser's built-in JSON.parse and re-serializes it with JSON.stringify. If your JSON is invalid, it tells you exactly where the parser stopped, so you can fix syntax errors like trailing commas, missing quotes, or unescaped characters quickly. See the JSON basics guide for common mistakes.