Add a Digital Signature to your PDF and Authorize it securely. It’s fast, easy, and free!
Need to authorize a document quickly and securely? Our Sign PDF tool lets you add a digital signature to any PDF file online. It's the perfect solution for contracts, agreements, and official forms.
Forget printing, signing, and scanning. With our tool, you can get your documents signed in seconds, saving you time and hassle.
Draw or upload your signature and place it on your PDF quickly and securely.
or click to choose file
Maximum file size: 50MB
Sign PDF is a process of adding an electronic signature to a PDF document. This digital signature serves as verification that the document has been approved and authorized by the signer. It's a convenient and secure way to finalize agreements, contracts, and other important paperwork online.
Use cases include:
Signing contracts and agreements electronically
Authorizing official documents remotely
Approving invoices and purchase orders online
Adding signatures to legal paperwork
Securing sensitive information with a digital seal
Whether you're signing a business contract or authorizing a personal document, our Sign PDF tool provides a reliable and efficient solution.
Signing a PDF document online is easy with our intuitive tool. Just follow these simple steps:
Upload your PDF file to our online tool.
Add your electronic signature using your mouse, trackpad, or touchscreen.
Download the signed PDF document to your computer or device.
That's it! Your PDF document is now signed and ready to be shared or stored securely.
Our Sign PDF tool offers several advantages over traditional methods of signing documents:
You get a tool that’s:
Add password protection to your PDF files. Encrypt with strong AES encryption.
Add text or image watermarks to your PDF. Protect your documents from unauthorized use.
Remove password protection from PDF files. Instantly decrypt secured documents.
Reduce file size without losing quality. Perfect for sharing, uploading, and saving storage.
Find answers to common questions about our PDF tools
Yes, your security is our top priority. We use secure encryption protocols to protect your data during the signing process. Additionally, we do not store your documents on our servers after processing.
Our tool supports electronic signatures, which are legally binding in many countries. These signatures provide a secure and verifiable way to authorize your PDF documents.
Absolutely! Our online tool is designed to be responsive and work seamlessly on any device, including smartphones and tablets. You can sign your PDFs on the go, anytime, anywhere.
No, you don't need to install any software. Our tool is entirely web-based, meaning you can access it directly from your browser. Simply upload your PDF, sign it, and download the signed document.
While we strive to accommodate most files, there is a size limit to ensure optimal performance. If you have a very large PDF, consider using our compress-pdf tool first to reduce its size.
Yes, our tool allows you to add multiple signatures to a single PDF. This is useful when you need several people to authorize a document.
A digitally signed PDF contains a digital certificate that can be verified using any standard PDF reader. The certificate confirms the authenticity and integrity of the document.
Besides signing PDFs, we offer a suite of other helpful tools, including compress-pdf, merge-pdf, split-pdf, pdf-to-jpg, and pdf-to-word. These tools can help you manage and manipulate your PDF documents with ease.
Yes, our basic PDF signing service is free to use. We also offer premium features for users with more advanced needs.
Our tool focuses on signing existing PDFs. If you need to make edits, you might consider converting it to a Word document using our pdf-to-word tool, making your edits, and then converting it back to PDF before signing.
Can't find the answer you're looking for? Please chat with our friendly team.
From quick edits to advanced document handling, ShrinkMyPDF offers a complete suite of tools designed for speed, simplicity, and precision. No technical skills needed — just upload and go.
Start using ShrinkMyPDF now — fast, secure, and completely free.