Smallpdf’s eSign PDF tool allows you to sign PDF files online in just a few seconds—no printing, scanning, or mailing required. Whether you need to approve contracts, fill out forms, or add initials to official documents, our digital signature feature helps you complete everything faster, safely, and more conveniently.

With Smallpdf, signing PDFs takes only a few simple steps. Upload your document, add your signature or initials, and download your signed PDF instantly. Our user-friendly interface ensures that anyone can sign documents without any technical difficulty, all within a few clicks.
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Security is at the heart of our service. All files are protected using TLS encryption, ensuring your data remains private throughout the signing process. Uploaded documents are automatically deleted from our servers within one hour unless you choose to save them securely to your Smallpdf account.
And eSignatures aren’t limited to PDFs alone — you can also upload Word, Excel, PowerPoint, or image files, and our system will automatically convert them into PDF format so you can sign them quickly and safely.
How to eSign a PDF online:
1️⃣ Import or drag and drop your PDF into the eSign tool.
2️⃣ Add your signature, initials, text, or date as needed.
3️⃣ Click “Finish & Sign” to apply your changes.
4️⃣ Download or share your signed document — it’s that simple!
Smallpdf works seamlessly across all platforms, including Mac, Windows, Linux, and mobile devices, so you can eSign documents anytime, anywhere. With over 1.7 billion users worldwide, Smallpdf has become one of the most trusted online PDF solutions, helping individuals and businesses embrace a faster, smarter, and more secure way to handle documents in the digital age.