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Compress Image to KB

Reduce JPG, PNG or WebP images below a chosen file-size limit, with measured output sizes.

Free No sign-up Runs in your browser

JPG, PNG or WebP · Up to 20 MB and 16 million pixels per image · Files stay on your device.

1 KB = 1,000 bytes. Your result must be below this limit.

Guide: reduce image size below 100 KB

What is Compress Image to KB?

Compress Image to KB is a free online image tool from GigaTools. Reduce JPG, PNG or WebP images below a chosen file-size limit, with measured output sizes. It runs entirely in your web browser, so nothing is uploaded and it works on any device without installing software.

Common uses

  • Reduce JPG, PNG or WebP images below a chosen file-size limit, with measured output sizes.
  • Prepare files without uploading them to a server

How it works

How to use Compress Image to KB

Choose an image

Select a JPG, PNG or WebP file up to 20 MB and 16 million pixels.

Set the size limit

Enter your maximum in KB. Choose whether dimensions may shrink to reach it.

Inspect the result

Compare the preview and measured output size, then download the JPG.

FAQ

Good to know

How do I use Compress Image to KB?

1. Choose an image: Select a JPG, PNG or WebP file up to 20 MB and 16 million pixels. 2. Set the size limit: Enter your maximum in KB. Choose whether dimensions may shrink to reach it. 3. Inspect the result: Compare the preview and measured output size, then download the JPG.

Will the result be exactly the requested KB?

No. It aims for a file below the limit, not a padded file of exactly that size. KB means 1,000 bytes. The result displays exact bytes; compression is lossy.

What are the limits?

JPG, PNG or WebP only. Each input is limited to 20 MB and 16 million pixels. Output is limited to 16 million pixels; contact sheets accept up to 12 files.

Are images uploaded?

No. File processing stays in your browser. This does not remove all third-party requests made by the website.

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