JSON Prettify
Format and beautify JSON with customizable indentation. Instantly prettify compressed JSON online in your browser.
What is JSON prettify?
JSON prettify (or beautify) is the process of formatting compressed JSON into a human-readable form with proper indentation and line breaks.
What indentation options are available?
You can choose between 2 spaces, 4 spaces, or tab indentation for the formatted output.
Is my data safe?
Yes. All processing happens locally in your browser. No data is sent to any server.
What happens if my JSON is invalid?
The tool will display an error message indicating the issue with your JSON syntax.
Can I use this tool offline?
Yes, once the page is loaded, it works entirely offline in your browser.
Does this tool validate JSON?
Yes, it automatically validates your JSON and shows syntax errors if any.
What is JSON used for?
JSON (JavaScript Object Notation) is a lightweight data format used for APIs, configuration files, and data exchange between systems.
Can I copy the formatted JSON?
Yes, you can easily copy the formatted output with one click.
Is there a file size limit?
No strict limit, but very large files may be slower depending on your browser's performance.
Does it support nested JSON?
Yes, it handles deeply nested JSON structures perfectly.
How to Use JSON Prettify
Turn compressed single-line JSON into a readable, properly indented document using your preferred indentation style. Formatting happens locally in your browser, so nothing you paste is ever uploaded.
- Paste the compressed JSON into the input box showing “Paste your JSON here...”.
- Pick an indent under “Indentation:” — “2 Spaces”, “4 Spaces”, or “Tab”.
- The formatted result appears instantly in the area marked “Formatted result will appear here...”.
- Switch between indentation styles to match your project's conventions, then copy the result.
Use “4 Spaces” for maximum readability in code reviews; “Tab” lets each reader's editor choose the display width.
Related Tools
- JSON Validator Validate JSON syntax instantly with detailed error messages and line numbers. Free online tool that runs 100% in your browser.
- JSON Minify Compress and minify JSON by removing all whitespace, tabs, and newlines. Reduce JSON file size by up to 70% instantly in your browser.
- TSV to JSON Convert TSV to JSON online free. Supports headers, auto type detection, and minification. All processing in browser.
- JSON to CSV Free online JSON to CSV converter. Flatten nested objects with dot notation, choose custom delimiters, and download instantly. 100% browser-based, no upload needed.
- CSV to JSON Converter Convert CSV to JSON online free. Supports custom delimiters, header-based objects, auto type detection. All processing in browser.
- XML Beautifier Free online XML beautifier. Format, prettify and indent XML instantly in your browser with customizable options.
- XML Validator Validate XML syntax and structure instantly. Detect errors with precise line numbers and detailed messages. Free, secure, and runs entirely in your browser.
- SQL to JSON Convert SQL INSERT statements to JSON arrays or objects instantly. Supports multi-row VALUES, NULL handling, auto type detection, and pretty print. 100% client-side, no upload.