Sign PDF
Draw or upload your signature, place it on the page, and download the signed PDF.
Your document never leaves this device
The PDF and your signature are processed entirely in your browser. Nothing is uploaded, stored, or sent anywhere — which matters, because contracts and IDs are exactly the kind of file you should not hand to a random web service.
1. Choose your PDF
Drop a PDF here or click to upload
2. Create your signature
Sign with your mouse, trackpad, or finger.
Preview
3. Place & download
Uses the same position and size on all pages — handy for initialling a contract.
Upload a PDF to see it here
Drag to move, or pull the blue corner to resize. Position is kept when you switch pages.
This is a visual signature, not a cryptographic one
This tool stamps a picture of your signature into the PDF. That is what most people mean by "signing a PDF", and it is accepted for the great majority of everyday paperwork — forms, letters, invoices, internal approvals, rental agreements.
What it is not is a digital signature in the cryptographic sense (PAdES, PKCS#7). Those bind the document to a certificate issued to you, let a verifier prove the file has not been altered since signing, and show a green tick in Acrobat. If you have been asked for a qualified or certificate-based signature — common for court filings, land registry, tax authorities, and some tenders — this tool will not satisfy that, and you need a certificate from a trust service provider instead. We would rather tell you that plainly than let you find out after filing.
How to Sign a PDF
- Upload your PDF — it loads locally, so large files stay fast and private.
- Draw your signature in the pad, or switch to Upload and pick a photo or scan of it.
- If you uploaded a photo, leave Remove white background on so the paper disappears and only the ink remains.
- Drag the signature on the page preview, and pull the blue corner to resize it.
- Turn on Place on every page if the document needs initialling throughout.
- Click Sign & Download PDF to save the signed copy.
Drawing vs uploading a signature
Drawing is quickest, and on a phone or tablet a finger or stylus gives a surprisingly natural line. With a mouse it tends to look shaky, which is worth knowing before you sign something that matters.
Uploading gives the better result for anything formal: sign a blank sheet of white paper with a dark pen, photograph it in even light, and let the background remover strip the paper away. Because the same image can be reused, every document you sign looks consistent — and it looks like your actual signature rather than a mouse approximation.
A PNG with real transparency needs no background removal at all — switch the option off and it is placed as-is.
Keeping a signature image safe
An image of your signature is a reusable credential: anyone holding the file can paste it onto any document. Treat it like a password rather than a photo. Do not email it to yourself, do not leave it in a shared drive or a group chat, and be wary of "free" online signing services that upload both your signature and your contract to their servers. This tool runs entirely in your browser precisely so neither ever leaves your device — you can confirm that by opening your browser devtools network tab while you sign and watching that no request is made.
Specifications
- Accepts
- PDF, Any image
- Gives you
- .pdf download
- Where it runs
- Your browser — the file is never uploaded
- Sign-up
- None
- Cost
- Free, with no usage limits
FAQ
Is a signature I draw here legally binding?
In many countries an electronic signature — including a drawn or pasted image — is legally valid for ordinary agreements, under frameworks such as the E-SIGN Act and UETA in the United States and eIDAS in the European Union. But validity depends on the type of document and your jurisdiction, and certain categories such as wills, property transfers, and some court documents often require a handwritten wet signature or a certificate-based digital signature. If the stakes are meaningful, confirm the requirement before you rely on an image.
Does this add a certificate-based digital signature?
No. It stamps a picture of your signature into the page. It does not create a PAdES or PKCS#7 signature, so Acrobat will not show a signature-validity panel and nobody can cryptographically prove the file is unaltered since you signed. For that you need a certificate from a trust service provider and software that supports certificate signing.
Is my PDF uploaded anywhere?
No. The file is read with the browser FileReader API, rendered locally with PDF.js, and rewritten locally with pdf-lib. No request carrying your document or signature is ever made — the only network activity is fetching the two JavaScript libraries themselves, which are served from this site and only downloaded once you open a PDF. You can verify this in your browser network tab.
Why does my uploaded signature have a grey or dirty background?
Photographs of paper are rarely pure white — shadows and camera white balance leave the paper slightly grey, so a strict threshold keeps it. Raise the Strength slider to remove more of the near-white pixels. If the background is uneven because of a shadow across the page, retake the photo in flatter light, or crop tighter around the signature. Very strong settings will start eating the thinner strokes of the ink itself.
Can I sign every page at once?
Yes — turn on "Place on every page" and the signature is stamped at the same relative position and size on all pages. It is positioned proportionally, so it lands correctly even in a document that mixes page sizes or orientations.
Can I add a date or typed name as well?
Not in this tool. You can place a second element by signing, then re-uploading the signed file and adding another image — for instance a small picture of the date. A dedicated text-stamping option may come later.
The signature looks blurry in the finished PDF. Why?
The drawing pad is rasterised at roughly twice its on-screen size, which is plenty at normal signature scale but can soften if you stretch it very large. For the crispest result, upload a high-resolution photo or scan instead of drawing, since that image is embedded at its original pixel dimensions.