Paste your JSON on the left. Get formatted, validated output on the right.
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's the most common format for APIs and configuration files.
1. Paste your JSON into the left panel. 2. Click "Format / Beautify" to pretty-print it with proper indentation. 3. Use "Minify" to compress JSON by removing whitespace. 4. The validator automatically checks your JSON for syntax errors as you type.
The most common JSON errors include: trailing commas after the last item in an array or object, using single quotes instead of double quotes, unquoted keys, and missing commas between items. This tool will tell you exactly where the error is.