JSON Formatter is a free tool for formatting, beautifying, minifying, and validating JSON data. Paste in raw or minified JSON and get perfectly indented, human-readable output. Great for debugging API responses, cleaning up config files, and validating data structures.
Format, minify, or validate JSON in three quick steps.
Enter or paste raw JSON into the input field. The tool accepts minified, prettified, or partially valid JSON with common syntax issues.
Click Format to pretty-print with your preferred indentation, Minify to compress, or Validate to check for syntax errors. Enable Sort Keys to alphabetize object keys.
The formatted result appears instantly. Click Copy to grab it, or continue editing — the tool re-validates on every change.
Paste a minified API response to pretty-print it with proper indentation. Instantly see the structure of deeply nested objects returned by REST or GraphQL endpoints.
Compress large JSON config files or payloads by removing all whitespace. Reduce file size before embedding JSON in environment variables, scripts, or HTTP headers.
Quickly check whether a JSON string is valid before using it in code. The validator pinpoints the exact line and character where the syntax breaks.
Alphabetically sort object keys so that two JSON objects with the same data always produce identical output. Eliminates false positives when diffing configs stored in version control.
Paste your JSON into the input panel and click Format. The tool parses your JSON, validates it, and displays it with proper indentation and syntax highlighting. You can also minify JSON by clicking the Minify button to remove all whitespace.
A JSON formatter (also called a JSON beautifier or pretty-printer) takes raw or minified JSON and reformats it with consistent indentation, line breaks, and spacing. This makes complex JSON structures readable and easier to debug.
Yes. The formatter runs entirely in your browser — your JSON is never sent to any server. It's safe to use with API keys, configuration secrets, and any sensitive data.
Yes. The formatter validates your JSON as it formats. If your input contains syntax errors — missing commas, unclosed brackets, invalid values — the tool highlights the error and tells you where the problem is.
Yes. Enable the 'Sort keys' option to alphabetically sort all object keys at every level. This is useful for comparing JSON files, creating consistent configurations, and making deeply nested objects easier to navigate.
Formatting (or beautifying) adds indentation and line breaks to make JSON human-readable. Minifying removes all unnecessary whitespace to make the JSON as compact as possible — useful for reducing payload size in APIs, config files, and storage.