Detailed Guide: JSON Validation and Formatting
JSON (JavaScript Object Notation) is the standard exchange format for modern web APIs. However, raw JSON files are often minified to reduce network payloads, which removes all indentation and whitespace, making it impossible for humans to scan. Prettifying JSON restores indentation and spacing for quick debugging.
Standard JSON Rules Checked by Our Validator
JSON has strict formatting rules that differ from standard JavaScript objects. Our real-time validator helps you identify and fix these rules:
- Double Quotes Only: All keys and string values must be enclosed in double quotes (
"key"). Single quotes ('key') are invalid. - No Trailing Commas: There must be no comma after the last key-value pair in an object or the last item in an array.
- Braces Match: All curly braces
{ }and square brackets[ ]must balance and nest correctly.
Minifying vs. Prettifying JSON
Use the tabs in the output panel to toggle views based on your needs:
- Pretty: Formats the JSON with indentation and colors, making it highly readable for debugging and developer inspection.
- Tree View: Renders an interactive collapsible view, useful when dealing with very large datasets.
- Minified: Compresses the JSON onto a single line and removes all whitespace, reducing file size for optimized API payloads.