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Compress Image to 100KB Online Free

Try a 100 KB JPG budget and review both the resulting bytes and pixel dimensions before attaching the file.

Free, no signup
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Your images

01 / Choose & prepare

Drop your image here

JPG, PNG and WebP · processed on your device

50 MB / image · 40 megapixels · 20 images / 100 MB batch
Output options

1 KB = 1024 bytes. JPG output; quality and dimensions can decrease to fit. Transparent areas become white.

Choose a file to get started.
Files stay on your device, from start to finish
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How to use Compress Image to 100KB

Three steps. No account or upload server.

  1. 01

    Choose your images

    Select JPG, PNG or WebP images from your device.

  2. 02

    Set the 100 KB target

    Keep the preset or enter another size in KB.

  3. 03

    Compress and review

    Check dimensions, quality and actual bytes before downloading.

Compress Image to 100KB questions

Short answers, then the practical details.

How does the 100 KB image target work?

The tool tests actual JPEG output bytes against 100 × 1024 bytes, adjusting quality and then dimensions when needed. It keeps the best quality found within the current dimensions and target. Review the result before submitting because a strict file-size limit can require visible loss of detail.

Will compressing an image to 100 KB change its dimensions?

Dimensions may decrease when JPEG quality alone cannot fit your 100 KB limit. The result displays the output width and height so you can compare them with a form’s minimum requirements. If the photo becomes too small or soft, choose a larger target or a less detailed source image.

Can I keep transparency in a 100 KB image?

This preset exports JPG, which does not support transparency, so transparent source areas become white. It accepts JPG, PNG and WebP inputs, but the downloaded format is JPEG. Use the general image compressor with PNG output if retaining alpha transparency matters more than the 100 KB target.