Paste or type your JSON below to format, validate and beautify it instantly. Supports pretty-print and minify modes — errors are highlighted with line numbers.
A JSON formatter is an online tool that reformats raw or minified JSON with proper indentation and line breaks, making it easy to read and understand.
Paste your JSON into the input panel and click Format (or press Cmd+Enter / Ctrl+Enter). The tool instantly beautifies your JSON with correct indentation.
Yes. All processing happens entirely in your browser. No data is ever sent to any server.
Yes. The tool automatically detects and reports syntax errors, showing you the exact line and position of any issue.
The formatter attempts best-effort repair of common mistakes like trailing commas or unquoted keys, and shows a clear error message when it cannot fix the issue.
Minification removes all unnecessary whitespace and line breaks from JSON, reducing file size for faster data transfer.
Yes. Use drag & drop to load files of any size. Large files are processed using a Web Worker to keep the interface responsive.