Sign PDF Online and Request Signatures

Two ways to sign

Sign a document yourself when you have been sent a PDF and need to return it signed. You open the file, draw, type or upload your signature, choose the page and position and download the result. All of it happens in your browser using the open-source pdf-lib library. The document is not uploaded anywhere, which you can confirm in your browser network tab.

Request a signature when someone else needs to sign. You upload the PDF, add a title and a short message, and get a private link to send. The person opening it gives their name, email and phone number, reads the document, signs it and returns a signed copy. You see each response on a private dashboard.

What a simple electronic signature is

A simple electronic signature is any electronic indication that a person agrees to a document: a drawn mark, a typed name or a clicked confirmation. Laws such as the ESIGN Act and UETA in the United States and the eIDAS Regulation in the European Union accept that a signature cannot be refused legal effect just because it is electronic. They also recognise stronger forms. eIDAS defines advanced and qualified electronic signatures, which rely on verified identities and certificates, and only a qualified signature is automatically treated as equivalent to a handwritten one across the EU.

This tool produces a simple electronic signature with a good audit trail. That is appropriate for everyday agreements such as quotes, proposals, delivery confirmations, consent forms and internal approvals. Some documents, such as property transfers, wills, certain financial and regulated documents, may legally require a witnessed, notarised or qualified signature. If you are unsure, ask a lawyer before relying on any electronic signature.

The audit trail

Evidence matters more than the drawing itself. When someone signs through a request link, the server records:

• the name, email and phone number they entered, and that they agreed to share them;
• when they opened the link and when the signed file reached the server;
• their IP address and browser identification;
• the SHA-256 fingerprint of the document you sent and of the signed copy.

The signed PDF also gains a certificate page listing the document, the signer and the method. A SHA-256 fingerprint is a 64-character value computed from every byte of a file. Change one character and the fingerprint changes completely, so it is a practical way to show that the copy in front of you is the one that was signed.

Privacy and who can see what

When you sign a document yourself, nothing is sent to us. When you request a signature, the PDF and the details people enter are stored on our server so the link can work. The link stops accepting signers after 24 hours, and the document, the responses and the signed copies are deleted automatically a few days after that, as stated on this page. Only two parties can see the responses: you, through your private dashboard link, and the administrator of this website. Links contain random tokens that are never written to our logs, and we store only fingerprints of them.

Before you send a link, make sure you have the right to share the document and that the recipient expects it. Signers are told who created the link before they enter anything.

How we prevent abuse

Only PDF files are accepted, and only up to a fixed size. Each address can create a limited number of links per day, forms carry an invisible trap for automated spam, and every link expires on its own. The site administrator can close or delete any link. If you receive a link you did not expect, do not enter your details, and tell us through the contact page.