Free JSON Minifier Online
Use this free JSON minifier to remove whitespace and shrink JSON size. Fast, private, and works directly in your browser.
What is JSON Minifier?
JSON Minifier removes spaces, line breaks, and indentation from JSON so the output is as small as possible. Minified JSON is useful for reducing payload size in APIs, configuration files, and network requests.
How to use this tool
- Paste your JSON into the input box.
- Click Minify JSON.
- Review the smaller output and size saved.
- Copy or download the minified JSON.
Features
- Remove all insignificant whitespace from JSON
- Validate JSON before minifying
- See the size reduction
- Copy the minified output
- Download the result as a .json file
This tool runs in your browser. Your files and text are not uploaded to our servers, and we do not store your input.
Frequently asked questions
Does minifying change my data?+
No. Minifying only removes whitespace. The data and its structure stay exactly the same.
Are my files sent anywhere?+
No. Everything is processed locally in your browser and nothing is uploaded.
Will it tell me if my JSON is broken?+
Yes. If the JSON cannot be parsed, you will see an error message instead of broken output.
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