01
JSON Formatter
Formats, indents and validates JSON with precise error positions, key sorting and a…
JSON Minifier
Strips all whitespace from JSON to produce the smallest valid output, showing the bytes saved.
Developer
Nothing uploaded
No sign-up
Free, unlimited
Paste something on the left to see the result.
In short
JSON Minifier is a free online tool on inputtesthub.com that strips all whitespace from JSON to produce the smallest valid output, showing the bytes saved. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the JSON Minifier
- Paste your code into the input area.
- Choose the indentation and output options you want.
- Read the formatted result, then copy or download it.
About the JSON Minifier
The JSON Minifier strips all whitespace from JSON to produce the smallest valid output, showing the bytes saved. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Shrinking a payload before storing it in a database column.
- Reducing bundle size for embedded configuration.
- Preparing JSON for a URL parameter.
Frequently asked questions
Are there any usage caps on the JSON Minifier?
There is no cost and no cap. The JSON Minifier is not a demo of a paid product, so nothing is held back or watermarked.
Is what I paste into the JSON Minifier stored?
No. The JSON Minifier runs entirely in your browser using JavaScript. Because the work happens locally, the utility also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
What problem does the JSON Minifier solve?
Typical uses: shrinking a payload before storing it in a database column. Reducing bundle size for embedded configuration. Preparing JSON for a URL parameter. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there an app version?
Yes. The page is responsive and the utility works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.
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