Upload your PDF to utilAZ, draw or type your signature, position it on the document, and download the signed file. For cryptographic digital signatures, upload a .p12/.pfx certificate, enter its password, and the tool embeds a PKCS#7 signature into the PDF structure -- all processed client-side.

An electronic signature is any mark indicating intent to sign (typed name, drawn image, click-to-accept). A digital signature is a specific type that uses cryptographic certificates (X.509/PKI) to mathematically prove identity and detect tampering. Digital signatures offer stronger legal weight and non-repudiation.

In Adobe Acrobat go to Edit → Preferences → Signatures → Identities & Trusted Certificates → More → Add ID → New Digital ID. Choose PKCS#12 file, enter your name and email, set a password, and save. This creates a self-signed certificate for signing PDFs.

In most jurisdictions (US ESIGN Act, EU eIDAS, UK Electronic Communications Act) electronic signatures are legally binding for most contracts. Advanced/qualified electronic signatures using certificates from trusted CAs carry the strongest legal presumption. Always consult local law for specific requirements.

Yes. utilAZ works in mobile browsers -- upload your PDF, draw your signature with your finger or stylus, place it on the page, and download. On iOS you can also use the built-in Markup tool, and on Android use Google Drive's built-in signing feature.