How to sign a PDF without printing it

Print, sign, scan, email: for a one-page form it is a remarkable amount of effort, and it usually produces a crooked, grey scan. You can put the same handwritten signature on the PDF directly.

Sign a PDF step by step

1. Open Sign PDF and add your document.
2. Draw your signature in the box. A finger on a phone or a stylus on a tablet looks the most natural; a mouse works too.
3. Choose the page, then click the preview where the signature should go.
4. Adjust the width, press Place signature, and download the signed PDF.

The signature is saved with a transparent background, so it sits on the line like ink rather than as a white rectangle covering the text. To sign more than one page, download the signed file, load it again and place the next signature.

Getting a signature that looks right

• Use the best input you have. A phone or tablet screen gives a far more natural line than a mouse or a laptop trackpad. If you are at a desk, it is often quicker to open the page on your phone and sign there.
• Sign big, then shrink. Draw the signature across most of the box. A large drawing scaled down looks smooth; a tiny one scaled up looks shaky.
• Set the width to match the line. The width is a share of the page width, so it stays in proportion on any paper size. A signature somewhere between a fifth and a third of the page width suits most forms — look at the space the form leaves and match it.
• Click on the line, not above it. Where you click on the preview is where the signature lands on the full-size page. If it is slightly off, place it again on a fresh copy rather than sending a signature that floats above the line.

Dates, initials and printed names

Forms often want more than a signature. Typed details such as a printed name or a date belong in the form's own fields where it has them — see the next section. Where it does not, remember that the signature box is simply a drawing area: you can write the date or your initials in it by hand and place them the same way, one pass for each. For a contract that needs initials on every page, that means one pass per page, so check how many are really required before you start.

If the PDF is a form

Fill in the fields first in your PDF reader, then run the file through Flatten PDF Form so the answers become a fixed part of the page. Sign the flattened copy last, so nothing can be changed after your signature is on it.

Is a drawn signature legally valid?

In many countries a drawn electronic signature is accepted for everyday agreements — rental forms, consent slips, delivery notes — but the rules depend on where you are and what you are signing. Some documents require a certificate-based digital signature, which proves who signed and that nothing changed afterwards. A drawn signature does not do that; it is the electronic equivalent of signing a printout. If a document says it needs a “digital signature”, ask the sender which kind they accept.

The kinds of electronic signature

The terms are used loosely, which causes most of the confusion. Broadly there are three levels:

• A simple electronic signature is any mark that shows you agreed: a drawn signature, a typed name, a ticked box. This is what a drawn signature on a PDF is.
• A signature from a signing service adds a record around the mark — who was emailed the document, when they opened it and when they signed. That audit trail is what makes it easier to prove later.
• A certificate-based digital signature uses cryptography to tie the document to a verified identity and to show if a single character changes afterwards. The European Union's eIDAS rules call the strictest form a qualified electronic signature and treat it as equivalent to a handwritten one.

Laws such as the ESIGN Act in the United States and eIDAS in the EU give electronic signatures legal effect in general, while carving out exceptions — wills and some property and family documents commonly still need ink, witnesses or a notary. None of this is legal advice: if the document matters, ask the other party or a lawyer what form of signature they need.

Before you send it

• Open the signed file and look at it at full size, on the page you signed. Check that the signature is where you meant and that nothing is covered.
• Keep an unsigned copy. If the other side sends a corrected version, you will want to sign that one fresh rather than reuse an old file.
• Send it only to the people who need it. A drawn signature is an image in the file, and anyone who has the file has a copy of that image.

Why sign in the browser

Many signing websites want your document and an account before they will do anything. Here the document and your signature stay in your browser and are gone when you close the tab — nothing is uploaded or stored. If the signed file needs to go out with other documents, Merge PDF combines them. If the other party asks for a full audit trail or a certificate-based signature, that is the moment to use the signing service they name instead.