How it works
How to resize your signature for online forms
- Sign on plain white paper with a black or dark blue pen. Use a thicker pen if the form needs a very small file.
- Photograph or scan it in good, even light — no shadows across the page.
- Upload it here. The tool automatically cleans the background to pure white, darkens the ink, and trims the empty space around your signature.
- Enter the size your form asks for — width, height and maximum KB — or tap a common size below the button.
- Download and upload it to your form.
Before and after
Typical signature upload requirements
| Typical dimensions | Typical file size | Where you see it |
|---|---|---|
| 140 × 60 px | 10–20 KB | Exam and job application portals |
| 300 × 80 px | Up to 20 KB | Government and admission forms |
| 350 × 150 px | Up to 50 KB | Registration and banking forms |
| 600 × 200 px | Up to 100 KB | Documents, contracts, email signatures |
Every form sets its own rules, so check the official instructions for the exact size, format, and ink color.
Tips for a clean, accepted signature
- Lines too thin or broken? Move the cleanup strength slider to the right.
- Gray smudges on the paper? Move the slider to the left.
- Need a transparent background for documents or email? Choose PNG. Most upload forms want JPG with a white background.
- Don't sign with a finger on a touchscreen for official forms unless allowed — a pen signature looks more consistent with your ID.
Frequently asked questions
How do I resize my signature to 20KB?
Upload a photo of your signature, enter the width and height your form requires, set Max size to 20 KB, and click Resize Signature. The tool keeps the exact dimensions and lowers JPG quality just enough to fit.
How do I make my signature background white?
Keep “Clean up background” set to Yes. The tool turns the paper pure white and darkens the ink automatically.
Can I get a transparent signature?
Yes. Choose PNG (transparent background) to place your signature on documents. Note that PNG files are larger, so use JPG when a form has a strict KB limit.
What is the standard signature size for online forms?
There's no single standard. Common requirements include 140×60 px at 10–20 KB and 300×80 px under 20 KB, but always follow the specific form's instructions.
Are my photos uploaded?
No. Everything happens in your browser on your own device. Your photos are never sent to a server.
Does it work on my phone?
Yes. It works in modern browsers on iPhone and Android — tap the upload box to pick a photo from your gallery.