How to use the Signature Resize
- Sign on plain white paper with a dark pen and take a clear photo.
- Choose the photo here. Crop it close to the signature on your phone first for best results.
- Pick the dimensions and KB limit your form asks for.
- Tap Resize image and download the signature JPG.
Features
Cleans the background
Grey or yellowish paper becomes pure white and ink becomes darker.
Exact dimensions
Fits your signature into the width and height the form wants.
Under the KB limit
Typical signature limits like 10 to 20 KB are reached easily.
On your device
Your signature is never uploaded anywhere.
How to photograph your signature
Use a black or dark blue pen on clean white paper. Take the photo in daylight or under a bright light, holding the phone straight above the paper to avoid shadows. Crop tightly around the signature before resizing so it fills the frame.
Getting the size right
Most online forms specify a width and height for the signature, either in pixels or in centimetres, along with a KB range. Use the quick buttons or type the exact numbers from your form's instructions. Requirements differ between portals, so always confirm them in the official notification.
Frequently asked questions
How do I resize my signature to 20KB?
Upload a clear photo of your signature, keep the target at 20 KB, choose the dimensions your form needs and tap Resize image.
What does Clean background do?
It turns light paper pixels pure white and darkens the ink, so your signature looks crisp and the file compresses better. Untick it if your signature is very light.
My signature is cut off. Why?
When both width and height are set, the image is cropped to fit those proportions. Crop your photo close to the signature first, or untick Keep proportions to fit it without cropping.
Are my files uploaded to your server?
No. This tool runs entirely inside your web browser using JavaScript. Your files are processed on your own phone or computer and are never sent to us or anyone else. You can even disconnect from the internet after the page loads and it will still work.
Can I use blue ink?
Yes, but dark ink gives the cleanest result. Clean background works for both black and blue.