JSON Minifier
Minify JSON by removing whitespace and line breaks, with a size comparison and error location if the JSON is invalid.
Your JSON is minified entirely in your browser. Nothing is sent to a server.
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How to use this tool
- 1Paste your JSON.
- 2The minified version appears instantly, along with how much smaller it is.
- 3Copy it or download it as a .json file.
Features
- Removes all unnecessary whitespace and line breaks.
- Shows the size before and after, and the percentage saved.
- Pinpoints the line and column of any JSON error.
- Copy or download the result.
- No account or sign-up required.
Privacy
Your JSON is minified entirely in your browser. It is never sent to a server.
Frequently asked questions
What does minifying JSON do?
It strips spaces, tabs and line breaks that only exist for readability, so the file is smaller while representing exactly the same data.
Does minifying change my data?
No. The values, keys and structure are identical — only the formatting whitespace is removed.
Why minify JSON?
Smaller payloads download and parse faster, which matters for APIs, configuration files and anything sent over a network.
How do I make minified JSON readable again?
Paste it into the JSON Formatter, which indents it neatly.
Guides
- What Is JSON Minification, and When Should You Use It?
Minifying JSON strips whitespace to make it smaller without changing the data. Learn when it helps, when it doesn't, and how to do it safely.