Someone emails you a form, a letter, or an agreement and asks you to "sign and send it back." The old way was painful: print it, sign with a pen, scan it, hope the scan isn't crooked, and email it back. GoPDFGo's Sign PDF tool skips all of that. You add your signature to the PDF right on screen and download the signed file — no printer, no scanner, no app. You can create your signature three ways: draw it with your finger or mouse, type your name and pick a handwriting style, or upload a photo of your real signature. Then just drag it onto the page exactly where it belongs, resize it, and download. The whole thing takes under a minute. Everything happens inside your browser — your document is never uploaded to a server. That matters, because the PDFs people sign are often the sensitive ones: offer letters, rental agreements, consent forms, bank paperwork. With GoPDFGo, your file and your signature stay on your own device. One honest note: this adds a visual (ink) signature — the kind that's perfect for everyday forms, approvals, and letters. It is not a legally certified digital signature (the DSC/PKI kind issued by a certifying authority), so for documents that specifically demand that, you'll need a registered digital signature instead.
A real example: signing a rental agreement
Common problems and how to fix them
Your uploaded signature shows a white or grey box around it
The tool places the image exactly as it is, so a plain photo keeps its background. Sign on white paper, take a clear photo, and remove the background so it's a transparent PNG before uploading. It then sits cleanly on the page instead of covering the text underneath.
The signature looks blurry or pixelated when you make it bigger
Every signature ends up as an image, so none of the three modes is infinitely scalable — but a drawn or typed one is generated at a reasonably high resolution, while an uploaded photo is limited to whatever the source file had. Start from a sharp, well-lit image and avoid stretching it much larger than its natural size. If it still looks rough, draw or type the signature instead, which usually gives you more resolution to work with. Start from a sharp, well-lit image and avoid stretching it much larger than its natural size. If it still looks rough, draw or type the signature instead.
It landed on the wrong page or slightly off the signature line
Nothing is committed until you download, so just drag it to reposition or move to the correct page first. Only tick Place this signature on all pages when you genuinely want it everywhere, otherwise it stamps pages you did not mean to sign.
Why Sign PDFs in Your Browser?
Draw, Type, or Upload
Make your signature whichever way suits you — draw it by hand, type your name in a signature-style font, or upload a clean photo of your real signature. You're in control of how it looks.
Place It Exactly Where You Want
Drag your signature to the right spot on any page and resize it to fit the signature line. What you see on screen is exactly where it lands in the final PDF.
100% Private
Your PDF and your signature never leave your device. The signing happens entirely in your browser, so even confidential agreements stay completely yours.
When You Need to Sign a PDF
Forms & Applications: Sign admission forms, job paperwork, or government forms and send them back without printing.
Agreements & Contracts: Add your signature to rental agreements, freelance contracts, or NDAs in seconds.
Letters & Approvals: Put a signature on official letters, authorisation notes, or approvals before emailing them.
Consent & Declaration Forms: Quickly sign school, medical, or bank consent forms from your phone or laptop.
How to Sign a PDF Online
Upload your PDF: Drop in the file you need to sign. It stays on your device.
Create your signature: Draw it, type your name in a handwriting style, or upload an image of your signature.
Place it: Drag the signature onto the right page and spot, then resize it to fit. Need it on every page? Tick 'Place this signature on all pages' to sign the whole document at once.
Download: Click to add the signature and download your signed PDF.
Sign PDF FAQs
Is this a legally valid digital signature?
It adds a visual (ink) signature, which is widely accepted for everyday forms, letters, and approvals. It is not a certified digital signature (DSC/PKI) issued by a certifying authority. If a document specifically requires that kind of signature, you'll need a registered DSC instead.
Is my document uploaded to a server?
No. Your PDF and signature are processed entirely in your browser on your own device. Nothing is ever uploaded, which keeps sensitive agreements private.
Can I sign on my phone?
Yes. You can draw your signature with your finger and drag it into place right on a phone or tablet — no app needed.
Can I place the signature on any page — or on every page?
Both. Move between pages and drop the signature on whichever page needs it, or tick 'Place this signature on all pages' to stamp it on every page at once — handy when you need to initial each page of an agreement.
What's the best way to upload my real signature?
Sign on white paper, take a clear photo, and ideally remove the background so it's a transparent PNG. A clean image sits more naturally on the document, though a normal photo works too.