How to Sign a PDF Online for Free
Someone sends you a contract, lease agreement, or consent form as a PDF. They need it signed and returned. The old way: print it, sign it with a pen, scan it back into a PDF, and email it. That process assumes you own a printer and a scanner, and it takes 15 minutes.
The modern way takes 30 seconds. Here is how to sign any PDF without leaving your browser.
Why you no longer need to print and scan
Electronic signatures have been legally valid in most countries for over two decades. The United States passed the ESIGN Act in 2000. The European Union has the eIDAS regulation. Canada, Australia, and most of Asia recognize electronic signatures as well.
For everyday documents - rental agreements, HR forms, permission slips, contracts between businesses - an electronic signature is fully legal and widely accepted. The only exceptions are specific categories like wills, certain court documents, and notarized filings, which vary by jurisdiction.
How to sign a PDF online
Using PrivConvert's PDF signing tool, the process is straightforward:
- Upload your PDF - drag and drop or click to select the document.
- Create your signature - draw it with your mouse or finger, type your name and select a handwriting style, or upload an image of your existing signature.
- Place and resize - click where you want the signature to appear on the document and adjust the size.
- Download - save the signed PDF to your device.
The entire process happens in your browser. Your document and signature never touch a server, which is critical when you are signing contracts, financial documents, or anything containing personal information.
Drawing vs. typing vs. uploading
Drawing your signature with a mouse produces a slightly shaky result compared to a real pen, but it is the most personal option. If you are using a tablet or phone with a touchscreen, the result looks much more natural.
Typing your name and selecting a script font is the cleanest option. It looks professional and is instantly readable, which is actually preferable for many business contexts.
Uploading a signature image works if you already have a clean scan or photo of your signature on a white background. This gives you the most authentic look, especially if you have a distinctive signature.
Adding dates and initials
Many forms require more than just a signature. You might need to add a date, your initials on every page, or fill in text fields. PrivConvert's signing tool lets you add text annotations alongside your signature, so you can complete the entire form without switching tools.
Privacy concerns with online signing
Most popular e-signature services (DocuSign, Adobe Sign, HelloSign) are cloud-based. Your document is uploaded to their servers, processed there, and stored for some period. For sensitive documents, this creates a privacy risk that many people overlook.
Browser-based tools that process everything locally eliminate this risk entirely. When you sign a PDF with PrivConvert, the document exists only in your browser's memory during the signing process. Once you close the tab, it is gone.
After signing: protect your PDF
Once you have signed a document, you might want to prevent others from modifying it. Password-protecting the PDF adds a layer of security that prevents editing while still allowing viewing.
If the signed PDF is too large to email (common with scanned documents), run it through a PDF compressor to reduce the file size before sending.
Can I sign on my phone?
Yes. Browser-based PDF signing tools work on any device with a modern browser. On a phone, you can draw your signature with your finger directly on the touchscreen, which actually produces a more natural-looking signature than using a mouse on a desktop.