JSON Formatter
Format, indent, validate, and beautify JSON data with live syntax highlighting.
About JSON Formatter
Format, beautify, and indent raw JSON payloads with customizable 2-space, 4-space, or tab indentation. Transform minified API responses and configuration files into clean, readable code.
How to use JSON Formatter
Add your file
Choose a file or drag it onto the upload box. We check that the file type and size are supported.
Pick your options
Change the settings shown next to the file if you need to. The defaults work for most files.
Download the result
Click the main button, then download your new file. Check it before you share or submit it.
What it does
- ✓Configurable indentation spacing (2 spaces, 4 spaces, or tabs)
- ✓Syntax error detection identifies misplaced commas, unclosed brackets, and illegal quotes
- ✓One-click clipboard copy and direct `.json` file download
- ✓Runs locally in browser memory to keep API keys and proprietary schemas private
When to use it
Beautify dense single-line REST and GraphQL JSON responses for rapid visual inspection.
Format package.json, tsconfig.json, and application config files for team code reviews.
Format NoSQL document exports (MongoDB, Firebase, DynamoDB) for reporting.
Inspect Redux, Zustand, and React component state trees during development.
Tips
- •If formatting fails, check the error message for the exact line and column of the syntax defect.
- •Use 2-space indentation for web standards and 4-space indentation for backend system configuration.
- •Click the Copy button to quickly transfer formatted JSON directly into your code editor.