Create & edit · Free
Compress image to 20 KB
Get a signature, a small portrait or a scanned note under 20 KB for strict upload fields. Black and white makes text and signatures far smaller, and nothing is uploaded.
- No account
- Runs on your device
- Phone & desktop
Your image under 20 KB
Stays on this device
Drop images here
JPG, PNG, WebP or GIF · several at once
Much smaller files for signatures and scanned documents.
Does the form ask for exact pixels?
Your images
Add images or try the sample photo.
Your images stay on this device. They are compressed in your browser and never uploaded. Camera details and location data are not copied into the new files.
Limits use 1 KB = 1,000 bytes, so a file under “100 KB” also passes forms that count 1 KB as 1,024 bytes.
How to get an image under 20 KB
Add the image
20 KB is selected. For a signature or a document, also tick “Black and white”.
Set the pixel size if the form asks
Forms with 20 KB limits often name a size too, such as 140 × 60 pixels for a signature. Enter it under exact pixels.
Download
When it shows “Under 20 KB”, download the file.
Signatures and documents in 20 KB
Sign with a dark pen on plain white paper and take the photo in good light. In the tool, choose “Black and white”: gray images need far fewer bytes than color, so the strokes stay crisp. Crop close around the signature before you add it, or enter the exact pixel size the form wants.
What 20 KB can hold
20 KB is enough for a sharp signature, a small passport-style portrait of roughly 300 × 400 pixels or a thumbnail. A full camera photo at 20 KB becomes small and soft; if the form allows a larger file, choose 50 or 100 KB instead.
More image size tools
Frequently asked questions
How do I compress a signature to 20 KB?
Add the photo of your signature, choose “Black and white”, keep 20 KB selected and download the result. Crop close or set the exact pixel size if the form names one.
Can a photo really fit in 20 KB?
Yes, but small: the tool lowers the quality first and then the pixel size, so a portrait usually ends up a few hundred pixels wide.
Is it private?
Yes. Your image is compressed in your browser and never uploaded.
Which format is best for 20 KB?
JPG is accepted almost everywhere. WebP is sharper at 20 KB if the form takes it.
Is it free?
Yes, free with no account and no watermark.
