Sign PDF
Add your handwritten signature to a PDF, right in your browser. Draw your signature, place it on the page you choose, and download. Everything runs on your device, so your document stays private. Need to combine files first? Use our PDF merger, or leave notes with add comments to PDF.
Sign PDF
Upload a PDF, draw your signature, place it on a page, then download
Sign with your mouse, trackpad, or finger. This adds a visible drawn signature, not a certificate-based digital signature.
What is Signing a PDF?
Signing a PDF with this tool means drawing your handwritten signature and placing it as a visible image on a page of a PDF (Portable Document Format) file. You draw your signature on a canvas, choose where it should sit, and the tool stamps that signature onto the page. According to MDN Web Docs, PDF page content is drawn as vector, text, and image objects, which means a signature image can be added directly onto a page.
This kind of signature is often called a drawn or electronic signature. It is a picture of your signature, added on top of the document, exactly like signing a printed page with a pen. It is great for approving agreements, filling in signature lines on forms, initialing letters, and returning documents without printing and scanning.
This tool uses pdf-lib, a powerful JavaScript library, to embed your signature entirely in your browser. This client-side processing keeps your PDF completely private and secure. All work happens locally, so your documents never leave your device or get uploaded to any server.
âšī¸Good to know
This tool adds a visible, hand-drawn signature to your document. It is not a certificate-based digital signature. It does not use a cryptographic certificate or PKI to verify your identity, and it is not the same as a certified, legally binding digital signature. For workflows that require a certified signature, use a dedicated e-signature provider that issues digital certificates.
âBefore Signing
A plain PDF has an empty signature line. To sign it the old way, you would print the page, sign with a pen, then scan it back in.
agreement.pdf
No signature on the page
âAfter Signing
Your drawn signature sits on the page you chose, at the position and size you picked. The document is ready to share, print, or archive, with no printer or scanner needed.
signed-agreement.pdf
Signature placed on the page
Why Use This Sign PDF Tool?
Signing a PDF in the browser is fast, private, and free. Here are the key advantages of using this tool:
Draw a Real Signature
Draw your own handwritten signature with a mouse, trackpad, or touchscreen. It looks like the signature you make with a pen, so your documents feel personal and authentic.
Place It Exactly
Choose the page, a position such as bottom right or top left, and a size. Your signature lands right where the signature line is, without any guesswork.
No Print and Scan
Skip the printer, the pen, and the scanner. Sign and return documents in seconds, straight from your computer or phone, even when you are away from the office.
Privacy and Security
All signing happens in your browser using client-side JavaScript. Your PDF and your signature never leave your device, are not uploaded to any server, and are not stored anywhere. Your documents stay private.
Fast and Free
Client-side processing means instant results with no file uploads and no waiting on a server. Sign documents in seconds, at no cost, with no account and no limits on how many files you process.
Redraw Anytime
Not happy with a stroke? Clear the pad and draw again as many times as you like. Take your time to get a signature that looks just right before you place it.
How It Works
This tool uses pdf-lib to embed your drawn signature directly onto the page in your browser. Here is how the process works:
Upload PDF File
Upload your PDF file. The tool loads it in your browser and displays the number of pages so you can pick where to sign.
Draw and Place
Draw your handwritten signature in the signature box, then pick the page, position, and size where it should appear on the document.
Sign and Download
Click Sign PDF to stamp your signature onto the chosen page. Once processing finishes, download your signed PDF file.
Tips for a Clean Signature
To get the best results when adding your signature to a PDF, follow these simple tips:
- âDraw slowly and steadily: A steady stroke gives a cleaner signature. On a laptop, a trackpad works, but a touchscreen or stylus usually gives the smoothest result.
- âUse the Clear button freely: If a stroke looks off, clear the pad and try again. There is no limit on how many times you can redraw before placing the signature.
- âMatch the position to the line: Pick the position that lands closest to the signature line, then adjust the size so your signature fits neatly in the space.
- âCheck the right page: Confirm the page number before you sign, especially for long documents where the signature line is near the end.
- âKeep your original file: The signature becomes part of the downloaded PDF. Save your original, unsigned file as a backup in case you need a clean copy later.
Frequently Asked Questions
How do I sign a PDF online?
Upload your PDF file, then draw your handwritten signature in the signature box with your mouse, trackpad, or finger. Choose the page, position, and size for the signature, then click Sign PDF. The tool stamps your drawn signature onto the page you picked. When it finishes, download your signed PDF.
Is this a certificate-based digital signature?
No. This tool adds your handwritten signature as a visible drawn image on the page, which is an electronic signature. It does not create a certificate-based digital signature and does not use a cryptographic certificate or PKI to verify your identity. If you need a certified, cryptographically verified signature for a legally binding workflow, use a dedicated e-signature service that issues digital certificates.
Is the sign PDF tool free?
Yes, this tool is 100% free. There is no registration, no account, and no hidden fees. All processing happens in your browser, so your files never leave your device and stay completely private.
Does my PDF get uploaded to a server?
No. Everything runs locally in your browser using client-side JavaScript. Your PDF and your drawn signature are never uploaded, sent to a server, or stored anywhere. This makes it safe for sensitive contracts, agreements, and forms.
Can I choose where my signature appears?
Yes. After you upload a PDF, pick the page number, a position (bottom right, bottom left, bottom center, top right, or top left), and a size (small, medium, or large). The tool places your drawn signature exactly where you choose on that page.
Can I redraw my signature if I make a mistake?
Yes. Click Clear under the signature box to wipe the pad and draw again as many times as you like. Take your time to get a signature you are happy with before you place it on the PDF.
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