Format, validate, beautify and minify JSON instantly in your browser. No data leaves your machine.
The TextForge API gives you JSON formatting, validation, minification and 14+ other developer utilities via simple REST endpoints. Free tier included.
JSON (JavaScript Object Notation) is a lightweight, human-readable data interchange format. It is the standard for REST APIs, configuration files, and data storage. JSON supports objects, arrays, strings, numbers, booleans, and null values.
JSON formatting (also called prettifying or beautifying) adds consistent indentation and line breaks to compressed JSON, making it easy to read and debug. Choose between 2-space, 4-space, or tab indentation to match your project style.
JSON minification removes all unnecessary whitespace, reducing file size for faster network transfer and storage efficiency. Minified JSON is functionally identical to formatted JSON but can be significantly smaller.
JSON validation checks that your data conforms to the JSON specification (RFC 8259). Common issues include trailing commas, single quotes instead of double quotes, unquoted keys, and missing brackets. Our validator pinpoints exact error locations.
This tool runs entirely in your browser using JavaScript. Your JSON data never leaves your machine and is never sent to any server. This makes it safe for sensitive data, API keys, configuration files, and private payloads.
Press Ctrl+Shift+F (or Cmd+Shift+F on Mac) to format. Press Ctrl+Shift+M to minify. Press Ctrl+Shift+V to validate. JSON is also auto-formatted when you paste it into the input field.