JSON Minifier
Strip whitespace from JSON and see exactly how many bytes you saved.
How it works
JSON Beautifier
Paste messy JSON, pick 2 spaces, 4 spaces or tabs, and copy clean output. Invalid JSON shows the line and column of the problem.
Paste or type to begin. Everything runs in your browser.
- 01
Paste JSON, drop a .json file onto the input, or load the sample.
- 02
Pick 2 spaces, 4 spaces or tabs. Sort keys alphabetically if you want a stable order.
- 03
Copy the formatted result or download it.
Good to know
- Only whitespace changes, unless you sort keys. Sorted keys make two API responses much easier to diff.
- Formatting happens in the tab, which makes it fine for payloads with tokens or customer data.
- Want to fold and search a big response instead of scrolling it? Use JSON Tree Viewer.
FAQ
Frequently asked questions
Why is my JSON invalid?
Usually a trailing comma, single quotes, an unquoted key, a comment, or a value like undefined or NaN. None of those are allowed in standard JSON.
Will it fix those errors for me?
No. It points at the line and column and leaves the data alone, so it never guesses what you meant. Fix that spot and the output appears.
Missing something?
Tell us the tool you wish existed.
Describe the job and the file types involved. The most requested tools get built first.