Compress an image to 20 KB
Quality and dimensions are tuned automatically to land under the limit — free, private, nothing uploaded.
Drag & drop an image
or click to browse · JPG, PNG, WebP, HEIC
Drag & drop images
or click to browse · up to 100 at once · JPG, PNG, WebP, HEIC
A 20 KB limit is one of the strictest you'll meet — common for signature and thumb-impression uploads on exam and government application portals. At this size the image must be small in pixels too, so the tool reduces both quality and dimensions automatically.
Getting the best result at 20 KB
- Expect the output to be a few hundred pixels wide — that's what 20 KB physically allows for a photo.
- Crop tightly to the subject (a signature, a stamp) before compressing; empty background wastes the byte budget.
- Portals with a 20 KB cap usually also specify exact pixel dimensions — check the form and use Resize & Crop first if needed.
Frequently asked questions
How does the tool get my image under 20 KB?
The tool binary-searches the JPG/WebP quality at your image's dimensions, and if even the lowest quality is too big it steps the dimensions down until the file fits under the target.
Why does my image look soft at 20 KB?
20 KB simply can't hold much detail. For documents like signatures, scan against a plain white background with strong contrast — that compresses far better than a photo.
Is my image uploaded anywhere?
No. Compression runs entirely in your browser — your image is processed on your own device and never uploaded to a server.