How to make a signature image
A good signature image is a transparent PNG: dark ink, no paper, cropped close. It drops onto any document and looks like you signed it there. You can photograph your real signature and clean it up, or make one from scratch in a minute. Here's both, plus the mistakes that make a signature image look pasted on.
Updated November 5, 2026 · 3 min read
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Option 1: make one from scratch
- 1
Open the signature maker
Our free signature maker works in any browser, with no sign-up. Nothing you type or draw is uploaded.
- 2
Type or draw it
Type your name and pick one of six script styles, adjusting size and slant, or switch to Draw and sign with a finger, stylus or mouse.
- 3
Choose the ink
Black for most documents. Blue is popular for contracts because it reads as an original rather than a photocopy.
- 4
Download
Pick PNG for a transparent image that works almost everywhere, or SVG for one that stays sharp at any size.
Option 2: photograph your pen signature
- 1
Sign for the camera
Use plain white paper and a black felt-tip or gel pen; a ballpoint is often too thin and gray. Sign a little larger than usual.
- 2
Take the photo in even light
Daylight near a window, with no shadow from your hand or phone. Hold the phone flat above the page, not at an angle, so the signature isn't skewed.
- 3
Crop it tight
In your phone's photo editor, crop to just the signature with a small margin. Leftover paper makes the image hard to place.
- 4
Remove the paper
Make the white background transparent with one of the tools below, then save as PNG. A JPG can't be transparent, so it always carries a white box.
Removing the background for free
- Mac: open the photo in Preview and click Remove Background. When Preview asks to convert the file to PNG, click Convert, or choose File > Duplicate first to keep the original. If patches of paper remain, the Instant Alpha tool in the Markup toolbar clears them.
- Windows: open the photo in Paint on Windows 11 and click the remove background button in the toolbar. If it's missing, update Paint from the Microsoft Store. Save the result as PNG.
- Skip this step entirely: when you sign in SignMaster, choose Upload or Photo and the paper is removed for you, so only your ink lands on the document.
Mistakes that give it away
- A white rectangle behind the ink. Save as a transparent PNG, not JPG.
- Gray, speckled paper. Shoot in brighter light, or raise the contrast before removing the background.
- Too big or too small. Size it to about twice the height of the text around it.
- Pixelated edges in print. Start from a sharp, close photo. The signature maker's PNG is drawn at twice the size for that reason.
Keep it private
Anyone with your signature image can paste it onto a document. Don't post it or email it around, and don't leave it in shared folders. It's a tool for your own documents, not proof of anything.
Using it to actually sign something
For your own letters, an image is all you need: see add a signature in Word or in Google Docs. For an agreement, sign through a process that records who signed. Each send in SignMaster is an envelope: one or more documents going to one or more signers.
- 1
Save it to your profile
In Settings > Profile > Your signature, add your signature from the picture. Add your initials too.
- 2
Send or sign the document
Start a new envelope, add yourself with Add me and anyone else signing, and place their fields.
- 3
Sign with your image
Your saved signature is offered first on every signature field assigned to you. You still review the document and agree to sign electronically each time.
Questions? Answers.
What file format should a signature image be?
PNG with a transparent background. It sits on any page without a box around it. SVG is sharper at large sizes but isn't supported everywhere.
How do I make the background of my signature transparent?
Use Remove Background in Preview on a Mac, Paint's background removal on Windows 11, or a signature tool that removes the paper for you, then save as PNG.
Is a signature image legally binding?
An image is a signature when someone puts it on a document intending to sign it. US law counts an electronic symbol adopted with intent to sign. The image alone can't show who placed it, though.
Can I use my signature image in SignMaster?
Yes. When signing, choose Upload to use your PNG or JPG, or Photo to photograph your signature on paper. SignMaster removes the paper so only the ink shows.
Sources
- Apple, Remove a background or extract an image in Preview on Mac · support.apple.com
- Microsoft Support, How to remove background from your photos and images (Paint) · support.microsoft.com
- 15 U.S.C. § 7006, ESIGN Act definitions (govinfo) · govinfo.gov
