Compress Image to 20 KB
BatchMany online application forms ask for a scanned signature or thumb impression under 20 KB. Compress your image to 20 KB in one step: the target size is already set, and the image is compressed on your device, never uploaded.
Processed on your device Image toolsAccepts JPG, PNG, WebP, GIF, BMP, AVIFUpdated
How to use Compress Image to 20 KB
- 1
Add one or more JPG, PNG or WebP images.
- 2
The target is already set to 20 KB; change the format or dimensions if you need to.
- 3
Compress and download images under 20 KB, one by one or as a ZIP.
Features
- Target size preset to 20 KB
- Before-and-after comparison
- Optional maximum width and height
- Batch compression with ZIP download
Common file size limits
Typical limits on forms and portals. Always check the exact size the form asks for, then compress to it.
| What you are uploading | Usual limit | Compress it |
|---|---|---|
| Scanned signature on an application form | 10–20 KB | This page |
| Passport-size photo for exam and job forms | 20–50 KB | Compress Image to 50 KB |
| Photo or ID upload on job portals | 100 KB | Compress Image to 100 KB |
| Certificates and documents as PDF | 100–200 KB | Compress PDF to 200 KB |
| Government and university portals | 500 KB | Compress PDF to 500 KB |
| Upload forms with a 1 MB cap | 1 MB | Compress PDF to 1 MB |
Real results: from MB to KB
Measured with these tools in Chrome on a laptop. Your own files may shrink more or less depending on what is in them.
| File | Before | Target | After | Saved |
|---|---|---|---|---|
| 3-page PDF of photos | 6.2 MB | 100 KB | 39 KB | −99% |
| 10-page PDF of photos | 1.9 MB | 200 KB | 166 KB | −91% |
| 10-page PDF of photos | 1.9 MB | 1 MB | 607 KB | −69% |
| 3000 × 2000 photo (JPG) | 1.9 MB | 100 KB | 91 KB | −95% |
| 3000 × 2000 photo (JPG) | 1.9 MB | 50 KB | 47 KB | −98% |
| 3000 × 2000 photo (JPG) | 1.9 MB | 20 KB | 20 KB | −99% |
Compress an image to a specific size
Guides
Frequently asked questions
How do I get a signature under 20 KB?
Crop the scan or photo tightly around the signature first, then compress it here. A small, tightly cropped image reaches 20 KB without becoming blurry.
What if the image is still bigger than 20 KB?
Turn on the maximum width and height option and lower it, for example to 400 pixels. Fewer pixels let the image reach 20 KB at a better quality.
Which format should I choose?
JPG is accepted almost everywhere and gets smallest for photos and scans. Keep the format the form asks for.
Are my files uploaded to a server?
No. Compress Image to 20 KB runs entirely in your browser, so your files stay on your device. Nothing is uploaded, stored or seen by anyone else.
Is Compress Image to 20 KB free?
Yes. It is completely free, with no sign-up and no watermarks.