Take a photo of your signature on paper — we strip the background automatically, so you drag a clean signature onto your PDF instead of a big white rectangle.
🔒 Runs entirely in your browser — your PDF never touches a server
⚠️ This tool needs an internet connection to load its PDF engine the first time you open the page. If nothing appears after uploading a PDF, check your connection and refresh.
1
Upload a photo of your signature
Sign on plain white or light paper, photograph it in decent light, upload it here
📷
Click to upload, or drag a photo here
JPG or PNG · your signature on paper
Original
Background Removed
2
Upload the PDF you're signing
We'll show every page so you can pick where to sign
📄
Click to upload, or drag a PDF here
Stays on your device — nothing is uploaded
3
Place your signature
Drag to move, use the green handle to resize, click a page thumbnail above to switch pages
4
Download your signed PDF
0 signatures placed across 0 pages
How It Works
01
Photograph Your Signature
Sign your name on plain paper, snap a photo in decent light. No scanner needed.
02
Background Removed Automatically
We look at how bright each pixel is — the paper turns transparent, your ink stays.
03
Drag It Onto Your PDF
Position and resize it on any page, sign as many pages as the document needs.
04
Download — Done
A new PDF is generated with your signature baked in, ready to send.
Why the Background Actually Matters
Paste a plain photo of a signature onto a PDF and you get a visible white rectangle sitting on top of the page — instantly obvious it wasn't signed by hand. Removing the background is what makes a photographed signature actually look like a signature: just the ink, nothing else, sitting directly on the page underneath it.
The two sliders exist because no two photos are lit the same way. A phone photo taken near a window looks different from one taken under an overhead light, and paper is rarely pure white in a photo — it usually reads a little gray or yellow. Background Sensitivity sets how bright a pixel needs to be before it's treated as paper instead of ink; Edge Softness controls how gradual that transition is, which is what keeps the edge of each pen stroke looking smooth instead of jagged.
What This Isn't
This places an image of your signature onto a PDF — the digital equivalent of printing a page, signing it, and scanning it back in. It doesn't add the cryptographic certification and audit trail that services like DocuSign or Adobe Sign attach to a document. For everyday paperwork — forms, letters, informal agreements — that's exactly what's needed. For contracts that specifically require a certified e-signature, use a dedicated e-signature service instead.
Frequently Asked Questions
Is this PDF signer actually free?
Yes, completely free, no account, no watermark. There's no server involved at all — your PDF and signature are processed entirely in your own browser.
Does my PDF get uploaded anywhere?
No. Everything happens locally in your browser using JavaScript. Your file is never sent to a server, which also means it never leaves your device.
How does the background removal work?
It looks at how bright each pixel is. Bright pixels (the paper) become transparent, and dark pixels (the ink) stay opaque, with a smooth blend in between so the edges of your signature don't look jagged.
Is this legally binding like DocuSign?
This places an image of your signature onto the PDF, similar to printing, signing, and scanning a document — it doesn't add cryptographic e-signature certification the way DocuSign or Adobe Sign do. For most everyday paperwork this is exactly what's needed; for contracts requiring certified e-signatures, use a dedicated e-signature service instead.