How to Sign a PDF for Free

To sign a PDF, draw or type your signature, place it on the page and save the document. No printing or scanning is needed, and in a browser-based tool the contract is never uploaded.

Quick answer: sign a PDF in 4 steps

1. Open the Sign PDF tool.
2. Add the PDF you need to sign.
3. Draw or type your signature, then drag it into place on the right page.
4. Download the signed PDF.

Step by step in detail

1. Create your signature

You can draw it with a mouse, trackpad or touchscreen, or type your name in a signature style. Drawing larger and resizing afterwards usually gives smoother lines than drawing small. On a phone or tablet, use your finger or stylus for the most natural result.

2. Place it

Go to the page that needs the signature and drag the signature onto the line. Resize it so it fits the line without covering printed text. Check the correct page; contracts often have signature lines on several pages.

3. Add supporting details

Many forms also need a date, initials or a printed name. Add these as text next to the signature. Keep fonts and sizes consistent with the document.

4. Save and verify

Download the signed file, open it and confirm the signature shows on the right page and nothing is clipped.

Electronic vs digital signatures

	Electronic (image) signature	Digital (certificate) signature
What it is	A drawn or typed mark placed on the page	A cryptographic signature tied to a certificate
Detects later edits	No	Yes
Typical use	Forms, simple agreements, approvals	Contracts and workflows needing proof of integrity
Tool	Sign PDF	Digital Sign PDF

Which one you need depends on who receives the document and the rules that apply to it. Requirements differ by country and by document type, so confirm with the recipient or a legal professional when it matters. Verifying a certificate-based signature later is possible with Validate Signature.

Signing a form

If the PDF is a fillable form, fill in the fields first with Form Filler, then add your signature. Filling before signing keeps the order natural and avoids edits after you sign.

Lock it in after signing

An image signature can be moved or removed in an editor. To reduce that risk:

• Flatten the PDF so the signature and form entries become part of the page.
• Add a password with permissions that block editing.
• Keep an untouched original and send only the signed copy.

Tips for a clean signature

• Draw large, then resize. It looks smoother than drawing small.
• Use a plain background. Transparent signatures blend better on forms.
• Sign the correct page. Use the page selector rather than assuming the last page.
• Check mobile. Zoom in to confirm the signature sits exactly on the line.

Why sign locally

Contracts often contain names, addresses and financial terms. A browser-based signer reads the file on your device and never sends it to a server, which removes a whole class of risk. Learn more in Is it safe to use online PDF tools?

Common problems

• The signature looks fuzzy. Re-draw it larger and place it again.
• It covers printed text. Resize it or move it slightly above the line.
• The recipient needs proof it was not altered. Use a certificate-based digital signature instead of an image.
• The file is locked. Unlock PDF first if you know the password.

Frequently asked questions

How do I sign a PDF without printing it?

Open Sign PDF, add the file, draw or type your signature, place it and download the result.

What is the difference between an electronic signature and a digital signature?

An electronic signature is any mark showing intent to sign. A digital signature uses a certificate and can detect later changes.

Is a drawn signature on a PDF legally valid?

Often for ordinary agreements, but rules vary. Check your requirements or ask a legal professional.

Is it safe to sign a contract in an online tool?

Only if the document stays on your device.

How do I add a date or initials next to my signature?

Add them as text on the same page, next to the signature.

How do I get several people to sign the same PDF?

Pass the file along in turn, each person signing and saving a copy; use certificate-based signatures for a full audit trail.

Summary

For everyday paperwork, draw your signature and place it; for stricter needs, use a certificate-based digital signature. Sign your PDF now.