eSign PDF for Free

Totally! Smallpdf and its tools are ISO/IEC 27001-certified and GDPR-compliant. Our PDF signer uses advanced TLS encryption, ensuring all your file transfers are secure.

Of course! With Smallpdf, you can add signatures to PDFs for free. If you love it, a Pro account gives you unlimited access to eSign and 40 other PDF tools that’ll change the way you get work done.

Yes. Simply download our mobile app (available for Android and iOS) and start signing. You can also sign PDFs online in your mobile browser.

Smallpdf integrates with Google Workspace, Microsoft OneDrive, and Dropbox. You can connect either cloud service to sign documents stored there and upload the signed PDFs back to the cloud service.

An electronic signature is any electronic method that shows a person’s intent to sign a document—for example, typing your name, pasting an image of your signature, or clicking “I accept.” It’s a broad term covering all forms of electronic agreement. A digital signature, on the other hand, is a specific type of electronic signature that uses encryption and digital certificates to prove the signee’s identity and secure the document. Digital signatures add a layer of security and authenticity by creating a unique, tamper-evident fingerprint for each signed document.

Smallpdf integrates with Google Workspace, Microsoft OneDrive, and Dropbox. You can connect either cloud service to sign documents stored there and upload the signed PDFs back to the cloud service.

Absolutely. Once you’ve added a signature to your PDF, head over to our free Protect PDF tool and set a password for your signed PDF.

Yes. The protections around the document itself are identical on both plans.

Both eSign and Sign.com are built by Smallpdf. eSign lets you quickly add your own signature to documents. Sign.com offers advanced features such as requesting signatures from others, tracking document activity, adding digital seals, and providing a Certificate of Completion—ideal for professional use when signing serious or sensitive documents.

A digital signature is a cryptographic process where a large unique number is calculated based on the document's contents and the attached certificate, which contains the name of the signee. The number that is calculated for the document can be verified with pretty much any PDF reader or software.

Yes. You can send a single document to multiple signees and receive a single finished file with everyone's signature.

In short, yes. Both e-signatures and digital signatures are legally binding (always check your local laws), but digital signatures are more secure. When you digitally sign, a unique digital marker is created for you. It can be verified and is very difficult to forge or tamper with.

You can sign a PDF from your email by uploading the attachment to Smallpdf's Sign PDF, adding your signature, and sharing the signed document straight from Smallpdf.

Usually, because they weren't expecting one. An unannounced email with a link to sign looks like a phishing attempt, so a quick heads-up by call, email, or Slack before you send makes a real difference.