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Compress image to 40KB

Set the size limit once and every photo comes out at 40KB or smaller, ready for forms, applications and uploads that reject large files.

Each image will be this size or smaller.

Width × height (px)

How to compress an image to 40KB

  1. Choose or drop your photo above. JPG, PNG, WebP and GIF all work.
  2. Leave the target at 40KB, or type a different limit.
  3. Download the result. The new file size is shown next to each image.

How the size limit is reached

The tool tries the highest image quality that still fits under 40KB. If quality alone isn’t enough, it gently reduces the pixel dimensions until the file fits. You always get the best-looking version that meets the limit.

A 40KB limit is common for profile photos, ID photos and online application forms. The tool hits it without you guessing at settings.

Frequently asked questions

Will my photo still look good at 40KB?

For most screen uses, yes. A 40KB JPEG keeps good detail at typical web and form dimensions.

Why did my image come out as JPG?

PNG files can’t be compressed by quality, so reaching a size limit usually requires JPEG. Choose WebP in Output format if you prefer it.

Are my images uploaded to a server?

No. Everything happens inside your browser on your own device. Your images are never sent to Tech9Pros or anyone else, so the tool also works with private photos and documents.

Can I process several images at once?

Yes. Select or drop up to 30 images together. Each one gets its own download button, and you can save them all as a single ZIP file.