How to format JSON in a few steps
Cleaning up JSON takes seconds.
Step 1: Open the tool
Go to JSON. It runs entirely in your browser — nothing to install, no account to create.
Step 2: Add your JSON
Paste JSON text or upload a `.json` file (up to 10 MB). Everything is processed locally.
Step 3: Format, minify, or validate
- Format — adds indentation for readability
- Minify — compresses to the smallest size
- Validate — flags syntax errors
Step 4: Explore and save
Use tree view to browse nested data, then copy or download the result. Repeat as needed.
Tips
- Format first to spot missing commas or brackets
- Validate before sharing or using the data
- Keep the original in case you need it later
What you need to get started
A modern browser (Chrome, Firefox, Safari, or Edge). The tool takes JSON text or a `.json` file up to 10 MB and does everything on your device.
Verdict
Skip installs, accounts, and uploads: open JSON and tidy your data in seconds.