Compress image to 20KB online - free, private, no signup
Get any photo under 20 KB for signature, photo or ID uploads with a very small limit. Toolbyte tries quality levels automatically and, if needed, scales the picture down slightly, so the result lands at or below 20 KB while looking as good as possible. Your image is processed in your browser and never uploaded.
Drag and drop JPG, PNG or WebP images here, or click to choose. You can add several at once.
Your files never leave your device.
How to compress image to 20kb
Add your photo. Drop a JPG, PNG or WebP file onto the tool, or click to choose it. Several photos can be compressed to 20 KB together.
Let it find the size. Click Compress. Toolbyte searches for the highest quality that stays at or under 20 KB and shows the final size.
Download and upload. Check the result size, then download the image (or a ZIP for several) and upload it to your form.
Why Toolbyte
- Private: your images are compressed in your browser and never uploaded.
- Aims at your 20 KB limit and tells you the final size, so you do not have to guess.
- Free with no signup, watermark or daily limit.
- Signatures and small ID photos are usually small in pixels already, so 20 KB is reachable without a visible drop for most scans.
- Works on phones, tablets and desktops in any modern browser.
Frequently asked questions
How do I compress an image to 20KB?
Add your image and click Compress. Toolbyte tests different quality levels, and scales the picture down slightly if needed, until the file is 20 KB or less. The final size is shown before you download.
When do I need an image under 20KB?
Very small upload limits (often 20 KB) show up on exam registration, job application and government forms for signatures and thumbnails.
Will the image still look good at 20KB?
For its pixel size, usually yes. Quality is kept as high as the limit allows. Very large photos may be made smaller in pixels, which is normal for form uploads.
What format is the result?
JPG, because it is accepted almost everywhere and compresses photos best. PNG and WebP files are converted to JPG and transparent areas become white.
Is it safe to upload my ID or signature here?
Nothing is uploaded. The compression runs inside your browser, so your picture never leaves your device and we cannot see it.
What if the result is still above 20KB?
Toolbyte tells you when a limit cannot be reached without making the picture extremely small. Crop away empty space first with the crop tool, or try the next larger size page.