JSON Beautifier

You can choose 2 Spaces, 4 Spaces, or Tab delimiters based on your team's code formatting rules.

The formatter flags the exact line and character position of the problem instead of silently failing, so you can fix the input and re-run.

Yes. Load a raw .json file from your device, format it, then copy the result or download the beautified output.

No. Parsing, highlighting, and formatting all run locally in your browser tab — nothing is uploaded anywhere.

Use the upload control to load your .json file directly, pick an indentation size, and format it. The beautified result can then be downloaded as a new file.

No. Formatting only adds whitespace and line breaks between tokens. Strings, numbers, and key order are left exactly as they were parsed.