Compress Image to 20KB: what it does
A 20 KB limit is common for signatures and small ID photos on application forms. Drop your images and each one comes out as a JPG under 20 KB at the highest quality that fits: the tool lowers the JPG quality step by step first, and makes the picture smaller only if it has to. Sizes count 1 KB as 1,000 bytes, so the file passes whether the website counts in thousands or in 1,024s. For a form that also asks for exact pixels, or a signature photographed on paper, use the signature resizer or the online-form photo tool instead: they crop, clean and size in one step. Everything runs in your browser, so nothing is uploaded.
How to use it
- Drop your images into the box, paste them, or tap to choose them from your phone. Add as many as you like.
- Pick the output format and quality. Optionally set a maximum size or a target file size in KB.
- Each image is processed on your device and listed with its old and new size.
- Download images one by one, or all of them as one ZIP.
Tips
- Signatures compress best: crop tight around the ink first, or use the signature resizer, which does it for you.
- For a face photo under 20 KB, keep the dimensions small (around 200 × 230 px) so quality stays acceptable.
- Several files at once? Drop them all and download one ZIP.
- If the result says it couldn’t reach 20 KB, the image was reduced as far as it reasonably goes; crop it first.
Frequently asked questions
How do I compress a photo to under 20 KB?
Drop it in the box: the target is already 20 KB. The tool finds the best JPG quality under 20 KB, reduces the dimensions only if needed, and lists the result.
Why does the file show 19 KB?
The tool stays just under 20,000 bytes so the file passes everywhere. Windows and macOS may show it as 19 KB because they count 1,024-byte units.
Can I compress a PNG signature to 20 KB?
Yes. It is saved as a JPG with a white background, which is what most forms ask for. For a transparent PNG signature, use the signature resizer.
Are my images uploaded?
No. Compression runs in your browser on your device.