JSON Minifier
Compress JSON into a single line by stripping all whitespace. Click Minify for the smallest output. Your data never leaves your browser.
How to minify JSON
- Paste your JSON into the input box.
- Click Minify to strip whitespace into one compact line.
- Invalid JSON is flagged with the exact line and column, so you can fix it first.
- Click Copy or download the minified result.
Why minify JSON?
Minified JSON is smaller, so it transfers faster and uses less bandwidth and storage — ideal for API responses, config bundles, and embedding JSON in other files. Minifying changes formatting only; your data stays identical and can be re-expanded anytime.
Need the readable version instead? Use the JSON Formatter to beautify, or the JSON Validator to check for errors. New to JSON? Read how to format and validate JSON.
Frequently Asked Questions
What does minifying JSON do?
It removes all whitespace, line breaks, and indentation, producing the smallest possible single-line JSON. The data is identical — only the formatting is stripped.
Why minify JSON?
Smaller payloads transfer faster and use less bandwidth and storage — useful for APIs, config bundles, and embedding JSON in other files.
Does minifying change my data?
No. Minifying only removes whitespace; every key and value stays exactly the same. You can re-expand it anytime by formatting.
Is my JSON uploaded anywhere?
No. Minification runs entirely in your browser, so your data never leaves your device.
How do I un-minify (beautify) JSON?
Use the format option to add indentation back. The JSON formatter beautifies and minifies interchangeably.
Does it validate while minifying?
Yes. Invalid JSON is reported with the line and column of the error so you can fix it before minifying.