Resize Image to 20 KB
Get an image under 20 KB in one click, right in your browser. The 20 KB limit is most often used for scanned signature uploads on exam and job application portals. Your file is never uploaded to a server.
Your media is processed in your browser and is not uploaded to our servers for conversion. Page assets (including the converter engine) still load over the network.
Select or drop an image to resize
JPG, PNG, or WebP. Resize by pixels, percent, or a KB target. Nothing is uploaded.
Click, tap, or drop a file
Your image is processed in your browser and is not uploaded to our servers for resizing.
How to resize an image to 20 KB
- Crop to the signature first. Trim away the surrounding paper so only the signature remains. This is the single biggest factor in staying sharp under 20 KB.
- Select or drop the image. Choose your scanned or photographed signature file. The target is already set to 20 KB.
- Click Resize Image. Quality is tuned automatically to fit under 20 KB, on your device.
- Check the strokes are still clear. Preview the result and confirm the signature is legible before downloading.
- Download and upload to the form. Save the JPG and submit it. The real file size is shown so you know it fits.
Why forms ask for images under 20 KB
A 20 KB limit almost always means a signature upload. Exam boards, banking recruitment portals, and government application systems typically require a scanned signature well under 20 KB, often alongside a fixed pixel size such as 140×60.
Signatures compress unusually well because they are mostly plain white paper with a small amount of dark ink, so very little visual detail has to be preserved. Getting under 20 KB is usually easy without the signature becoming unreadable.
The one thing that ruins a signature upload is a photo of the whole page. Crop tightly to the signature itself before resizing: a tight crop keeps the strokes sharp at a small file size, while a full-page photo wastes the entire budget on empty paper.
Frequently asked questions
How do I resize my signature to 20 KB?
Crop the image so only the signature is visible, drop it into the tool on this page, and click Resize Image. The target is preset to 20 KB, so the file is compressed to fit under that limit and shows you the real final size before you download.
Why does my signature look blurry at 20 KB?
Usually because the image includes a lot of blank paper around the signature, so the compression budget is spent on empty space. Crop tightly to the signature and try again. Scanning on plain white paper with good contrast also helps considerably.
Does my signature also need specific pixel dimensions?
Often yes. Many exam portals ask for both a KB limit and a pixel size such as 140×60. Set the exact dimensions first using the main image resizer, then bring the result back here to fit the 20 KB limit.
Is my signature uploaded anywhere?
No. The resizing happens entirely in your browser and the image is never sent to a server, which matters for a signature since it is sensitive personal data.
Other size targets
Need something else? Resize by exact pixels or percentage · Compress a batch of images