Runs entirely in your browser — your image is never uploaded to any server.
20KB is a common limit for signatures and small passport-style photographs on exam, admission and recruitment portals. Most phone photos are a hundred times bigger, so they need both compression and a smaller size in pixels to fit.
Tip: Crop to the face and shoulders (or just the signature) first. Fewer pixels leaves more of the 20KB for detail, so the result looks sharper.
How to compress an image to 20KB
- Select the photo or image you want to make smaller — JPG, PNG, WebP or a screenshot.
- Check the target size is 20KB, or change it if your form asks for a different limit.
- Press Compress to 20KB. The tool finds the best quality that fits, and reduces the width and height only if it has to.
- Check the new size and the preview, then download the JPG.
Frequently Asked Questions
How do I compress an image to 20KB?
Select your image, make sure the target is 20KB and press Compress to 20KB. The tool tries the highest quality that fits; if even a low quality is still too big, it reduces the width and height step by step until the file is under 20KB. Then download the JPG.
Will my photo still look good at 20KB?
Yes, for what 20KB limits are meant for. A cropped passport-style photo or a signature looks clear; a full landscape photo will come out small.
Will the file be exactly 20KB?
It will be at or just under 20KB — as close to the limit as possible without going over, because that keeps the most quality. Sizes are counted in thousands of bytes, so the file also passes forms that count 1KB as 1,024 bytes.
Can I compress a PNG or a screenshot to 20KB?
Yes. JPG, PNG and WebP images all work, including screenshots. The result is saved as a JPG, which is far smaller for photos; any transparent areas become white.
Is my photo uploaded anywhere?
No. The image is compressed inside your browser on your own phone or computer, and never sent to a server.