Will my image be exactly 20 KB?

It will be just under 20 KB, as close as we can get without going over. We count 20 KB as 20,000 bytes, so the file passes whether a form counts a kilobyte as 1,000 or 1,024 bytes.

Why did my photo get smaller in pixels?

Lowering JPG quality alone can't always reach 20 KB. When it can't, the image is scaled down step by step, just enough to fit. The result shows its new dimensions.

My PNG has a transparent background. What happens to it?

The result is a JPG, which can't store transparency, so transparent areas become white. That is usually what forms want for photos and signatures.

Is my photo uploaded?

No. Compression happens in your browser, so photos, signatures and ID scans never leave your device.

Compress Image to 20 KB

Shrink a JPG, PNG or WebP photo to under 20 KB, in your browser.

Choose images

or drag and drop them here

JPG, PNG or WebP · up to 50 images

Processed entirely in your browser, nothing is uploaded, stored or seen by us.

Something not working, or a feature missing?Report a problem or suggest a tool

How to Use

1Drop in one or more photos, or click to select them.
2The target is already set to 20 KB. Change it if your form asks for a different size.
3Click Compress, then download each image or all of them as a ZIP.

Features

Gets every image under 20 KB automatically
Highest quality that fits, scaled down only when it must be
Works with JPG, PNG and WebP, saved as JPG
Up to 50 images at once, download individually or as a ZIP
No upload, 100% in-browser

Compress Image to 20 KB reduces any photo to under 20 KB automatically. It picks the highest JPG quality that fits and only scales the picture down when quality alone isn't enough, so you get the best-looking file that meets the limit, without uploading anything.

When you need an image under 20 KB

Signature uploads on exam, job and bank application forms, which often allow only 10–20 KB
Passport-size photos on online forms with a strict photo limit
Thumbnails and small icons where every kilobyte counts

Every form sets its own limits. Check its instructions for the exact file size, format and pixel dimensions before you upload.

What fits in 20 KB

20 KB is tight for a photo. A passport-style picture a few hundred pixels across usually fits at good quality, but a full phone photo has to be scaled down a lot. If the form also gives pixel dimensions, resize to those first with the Image Resizer, then compress here, and you'll keep the most quality.

How it gets your image under the limit

If the image is already under 20 KB, you get it back untouched.
Otherwise it's saved as a JPG at the highest quality that stays under 20 KB.
If even the lowest quality is too big, the picture is scaled down a little at a time until it fits.

Need a different size? Change the number in the box, or use the full Image Compressor to compress by quality instead.