Free online JSON pretty printer. Format minified JSON into clean, readable output with proper indentation. Runs locally in your browser, no data uploaded.
100% Local
How to Use the JSON Pretty Print
Paste minified or compact JSON into the input box on the left. Click the Pretty Print button and the formatted version with clean 2-space indentation appears on the right. Use Clear to reset both panels.
What pretty print does
Applies 2-space indentation between every nesting level
Adds newlines between each key-value pair
Adds a space after every colon and comma
Preserves your original key order — no sorting
Features
Instant pretty-printing — no upload, no wait
Detects and reports JSON syntax errors with clear messages
Handles nested objects and arrays of any depth
Works with large JSON payloads without performance issues
All processing runs locally in your browser. Your data is not uploaded to any server.