JSON Minifier

Developer Tools

Compress JSON into one small line

FreePrivateInstant
Add a file · .txt .md .csv .json … · up to 2.00 MB
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  2. Press Copy code.
  3. Paste it into your page, blog, WordPress or Notion HTML block.
Height
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The tool runs inside your visitor's browser, nothing is uploaded, and a small "Powered by ToolCloak" line stays under it. The second line (script) is optional: it makes the frame fit the tool's height.

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History

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JSON Minifier — at a glance

Remove all spaces and line breaks from JSON to make it as small as possible for APIs, config files and storage.

Your input
{ "a": 1, "b": [1, 2] }
Run
Result
{"a":1,"b":[1,2]}

How to use it — step by step

Valid JSON text.

1

Paste your input

Paste or type your content into the big input box. Try a sample if you want to see it work.

2

Choose options

Pick the mode and options that fit what you need.

3

Minify JSON

Press the button. The result is created instantly on your device.

4

Copy the result

Check the output and press Copy to use it anywhere.

Pro tips

Small things that make the result better.

✦Minify JSON before sending it in an API request or saving it in a database.
✦Keep a formatted copy for editing — minified JSON is hard to read.
✦If you get an error, run the text through the JSON Validator first.

Quick facts

Freeno signup, no limit
Instantresult in a moment
Privatenothing is uploaded
Any devicephone, tablet or PC

Frequently Asked Questions

Does minifying change my data?+

No. Only spaces and line breaks are removed. Keys, values and order stay exactly the same.

Is my data safe?+

Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.

Is this tool really free?+

Yes — completely free, no signup, no watermark and no usage limit.

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