JSON Formatter & Validator

JSON formatting (or beautifying) adds proper indentation and line breaks to JSON data, making it easier to read and debug. This tool takes compressed or messy JSON and outputs clean, well-structured JSON.

Yes! When you format or minify JSON, the tool automatically validates it. If your JSON has syntax errors (missing brackets, trailing commas, etc.), you'll see a clear error message explaining the problem.

Format (beautify) adds indentation and line breaks for readability. Minify removes all unnecessary whitespace to create the smallest possible JSON string, useful for reducing file size in production.

Yes. All processing happens entirely in your browser using JavaScript. Your JSON data is never sent to our servers or stored anywhere. When you close the page, your data is gone.

You can choose between 2 spaces (default), 4 spaces, or 1 tab for indentation. Select your preference from the dropdown before formatting.

There's no strict limit, but very large JSON files (several MB) may slow down your browser since processing happens client-side. For best performance, keep files under 1MB.