Resize signature to 20 KB (300 × 80)
Many forms ask for a small, wide signature image under 20 KB. This starts at 300 × 80 pixels, and you can change it to match your form.
Nothing is uploaded. Your files stay private.
Popular sizes
Opens the tool with the right settings already chosen.
How to resize an image
Three steps, about ten seconds.
- 01
Add your image
Drop a JPG, PNG or WebP file in the box, or tap to choose one.
- 02
Set the size
Type a width and height in pixels, choose a file size limit, or both.
- 03
Download
Check the new dimensions and file size, then save the image.
Getting a clean signature image
Sign with a dark pen on plain white paper, then take the photo in good light, straight on, with no shadow across the page.
Crop close around the signature first, with Crop image, so it fills the frame. Otherwise most of the 300 × 80 picture will be empty paper.
Forms differ: some want 140 × 60 or 350 × 150 pixels, or a limit of 10 KB or 50 KB. Check your form's instructions and type its exact numbers in.
Frequently asked questions
What size should a signature be for online forms?
It depends on the form. Small, wide images like 300 × 80 or 140 × 60 pixels under 10–20 KB are common, but always follow the form's own instructions.
How do I resize a photo to 20 KB?
Choose 20 KB as the target size. The photo is saved at the best quality that fits, and scaled down if it has to be.
How do I resize an image to 50 KB?
Choose 50 KB as the target, and add a width and height too if your form asks for exact pixels.
Can I resize an image without losing quality?
Making a photo smaller in pixels keeps it sharp. A KB target may lower quality a little to fit, and making a small photo bigger can't add detail.