Free digital signature software.

Free digital signature software lets you apply a real cryptographic digital signature to a document at no cost. Unlike a plain electronic signature - which can be a typed name or a drawn image - a digital signature uses a certificate and a cryptographic hash to bind your identity to the exact file and prove it has not changed since. Document eSign issues a genuine PAdES-B digital signature on every signed document, hashed with SHA-256 and carrying a trusted timestamp, on the free plan with no credit card. The result opens and verifies in Adobe Acrobat like any certificate-based signature, so the people you send it to can confirm it is valid without taking your word for it.

An electronic signature is the broad legal category: the act of signing electronically by typing your name, drawing it, or clicking to accept. It is valid under the ESIGN Act and UETA. A digital signature is a specific cryptographic method - using certificates, hashing, and seals such as PAdES - that secures and verifies an electronic signature. Put simply, the electronic signature is the intent to sign, and the digital signature is the technology that proves the document is authentic and unchanged. Strong software layers both: an easy signing experience for the user, backed by a cryptographic seal underneath. Document eSign does exactly this, so your signature is both legally valid and cryptographically verifiable.

Yes. A digital signature is legally binding wherever electronic signatures are recognized - in the US under the ESIGN Act and UETA, and in the EU under eIDAS. A cryptographic digital signature is generally stronger evidence than a basic electronic signature, because it proves not only that someone signed but that the document has not been altered since. Under eIDAS, Document eSign signatures meet the Simple (SES) and Advanced (AdES) standards. The cryptographic seal and the audit trail together give a court or auditor what they actually look for: who signed, when, and proof the file is unchanged. Price does not affect validity - a free digital signature holds up the same as a paid one.

Yes. Because Document eSign applies a standard PAdES digital signature, the signed PDF opens in Adobe Acrobat or Acrobat Reader and shows the signature panel with a validity status - typically “Signed and all signatures are valid” - along with the signer details and the certificate used. Anyone you send the document to can verify it themselves, with no Document eSign account, using software they already have. This is the practical advantage of a real digital signature over an image-based one: the verification is built into the file and checked by the reader, not something the recipient has to trust on faith.

PAdES - PDF Advanced Electronic Signatures - is the ETSI standard (EN 319 142) for embedding digital signatures inside a PDF. It defines how the signature, the signing certificate, and a trusted timestamp are stored in the file so that any PAdES-aware reader, including Adobe Acrobat, can validate them. A PAdES signature cryptographically seals the document: it captures a hash of the file at signing time, and if a single byte changes afterward, validation fails. PAdES aligns with the EU eIDAS regulation and is the format behind Document eSign's digital signatures. It is what lets a signed PDF carry its own proof of authenticity and integrity, verifiable long after it was signed.

No - Document eSign handles the certificate for you. Traditionally, creating a digital signature meant obtaining and managing your own digital certificate, which is why digital signatures had a reputation for being complicated. Document eSign removes that step: when you sign, the platform applies the cryptographic certificate and PAdES seal automatically, so you get a genuine digital signature without buying a certificate, installing software, or configuring anything. You just upload your document and sign in the browser. The certificate-based proof is embedded in the finished PDF, ready to verify in Acrobat, while the experience stays as simple as a normal electronic signature.

Yes, when it uses real cryptography rather than pasting an image onto a PDF. Document eSign encrypts documents in transit and at rest, hashes each file with SHA-256 at signing, and seals it with a PAdES digital signature so any later change is detectable. A trusted timestamp records when the signing happened, and the audit trail captures the signer's email, IP address, and the time of every action. Together these mean you can prove both who signed and that the document is unchanged. Security does not depend on the price of the plan - the same cryptographic sealing applies on the free plan as on the paid ones.

Yes. The proof travels inside the signed PDF, so recipients verify it with the PDF reader they already use - Adobe Acrobat or Reader checks the certificate and shows whether the signature is valid, with no Document eSign account and nothing to install. They can also open the embedded audit trail to see who signed and when. This is a core benefit of a certificate-based digital signature over a simple image: verification is self-contained and independent, so the recipient does not have to trust the sender or log into a third-party service to confirm the document is authentic.