How to use Compress Image to 20KB
- Select or drag your JPG, PNG or WebP image.
- Check the maximum size is 20 KB.
- Click Compress images and download your image under 20KB.
Where is a 20KB limit used?
Signature uploads on exam, recruitment and banking forms are often limited to 10–20KB. If the file is even 1KB over the limit, most forms reject it.
How the tool reaches 20KB
The tool lowers JPG quality step by step and, only if needed, reduces the image dimensions until the file is at or below 20KB. PNG images, which cannot get very small, are converted to JPG automatically and the result tells you so.
Tips for photos and signatures
Crop the image to just the face or signature first — fewer pixels means better quality at the same size. Use a plain light background and good lighting; noisy, dark photos need more bytes. For signatures, sign with a dark pen on white paper.
Check the required dimensions too
Some forms also ask for exact pixel sizes, such as 200 × 230 for a photo or 140 × 60 for a signature. Resize the image to those dimensions first with Resize Image, then compress it here.
Frequently asked questions
Will the image be exactly 20KB?
It will be at or below 20KB, usually slightly smaller, so it passes the upload check.
Can I compress several images at once?
Yes. Select multiple images and download them individually or together as a ZIP.
Why did my PNG become a JPG?
PNG is lossless and rarely reaches small sizes. Converting to JPG is the only way to meet strict limits while keeping the picture clear.
Are my files uploaded to a server?
No. Everything is processed directly in your browser using JavaScript. Your files never leave your device, so they stay completely private.
Last updated: · Free to use, no sign-up.