JSON Beautifier – Pretty Print JSON Online
Paste any minified, compressed, or raw JSON below and instantly beautify it with clean indentation and formatting. Choose your preferred indent size. All processing happens in your browser — nothing is uploaded.
What is a JSON Beautifier?
A JSON beautifier (also called a JSON pretty printer or JSON formatter) takes compact, minified JSON and adds proper indentation, line breaks, and spacing to make it human-readable. When JSON is returned from an API or stored in a database, it is often a single long line with no whitespace — impossible to read or debug. A JSON beautifier transforms it into a clean, structured format instantly.
JSON Beautifier vs JSON Formatter — Are They the Same?
Yes — JSON beautifier, JSON formatter, JSON pretty printer, and JSON indenter all refer to the same operation: adding whitespace and indentation to make JSON readable. The terms are used interchangeably. JSONHack's beautifier supports 2-space, 4-space, 1-space, and tab indentation to match your team's coding style.
How to Beautify JSON
- Paste your minified or raw JSON into the input box on the left
- Choose your preferred indent size (2 spaces is the most common)
- Click Beautify — the formatted JSON appears on the right instantly
- Click Copy to copy to clipboard or Download to save as a file
Common Use Cases
API Response Debugging
Copy a minified API response from your browser's network tab and beautify it to understand the data structure instantly.
Log File Analysis
Application logs often contain minified JSON. Beautify them to read error details, stack traces, and event data clearly.
Code Review
Format JSON configuration files and data fixtures before committing to version control so teammates can review them easily.
Learning JSON
Beautifying JSON helps beginners understand the structure — objects, arrays, nesting, and key-value pairs become visually clear.
Indent Size Guide
- 2 spaces — the most popular choice. Used by most JavaScript style guides (Airbnb, Google, StandardJS) and JSON tools
- 4 spaces — common in Python, Java, and C# projects. More readable for deeply nested structures
- Tabs — preferred by some developers for accessibility (tab width can be configured per-editor)
- 1 space — compact but still readable. Useful when screen space is limited
Validate, minify, compare, convert to CSV, decode JWT, and more — all free.