How to sign a PDF for free
Signing a PDF should not need a subscription or an account. Here is how to add a signature in about a minute, keeping the document on your own machine.
Every step runs on your device — no upload, no account
Sign a document nowStep by step
1. Open the signing tool
Open the PDFFILZ sign tool and drop in the contract, form or letter you need to sign.
2. Draw your signature
Sign with a mouse, trackpad or finger on a phone. A slower stroke gives a cleaner, more natural line.
3. Place it on the page
Move the signature onto the signature line and resize it so it sits within the field rather than over the printed text.
4. Export the signed copy
Save the signed PDF. The signature is drawn into the page itself, so it stays put in any PDF reader.
Frequently asked questions
Is an electronic signature legally valid?
In most countries an electronic signature is legally binding for everyday agreements under laws such as the US ESIGN Act and the EU eIDAS regulation. Certain documents, like some wills and property deeds, still require a wet signature — check your local rules for those.
Do I need to print and scan the document?
No. Drawing the signature directly on the PDF keeps the file sharp and avoids a scan that doubles the file size.
Can I sign a PDF on my phone?
Yes. The tool works in a mobile browser, and drawing with a finger usually looks better than a trackpad signature.
Is my contract uploaded to a server?
No. Signing happens entirely in your browser, which matters when the document contains salary, medical or client details.