Question 1

Is the PDF uploaded to be signed?

Accepted Answer

No. The document is rendered and written in this page by pdf.js and pdf-lib, so a contract with your address, salary or bank details in it never leaves your computer. There is no account, and nothing is kept once you close the tab.

Question 2

Is my signature saved anywhere?

Accepted Answer

Only if you tick Remember my signatures, and then only in this browser's own storage on this device - it is never sent anywhere. Untick it, or press the small cross on a saved signature, and it is removed.

Question 3

Is an electronic signature legally binding?

Accepted Answer

In most countries a signature applied like this is valid for most everyday agreements - the US ESIGN Act and the EU's eIDAS regulation both recognise simple electronic signatures - but some documents, such as wills or property deeds in many places, need more. If it matters, check what the other party or the law requires.

Question 4

Can the other person tell the PDF was changed?

Accepted Answer

The signature and anything else you added are drawn onto the page as images, the way a printer would put them there, and the rest of the document is left as it was. Form answers are written into the PDF's own fields, and stay editable unless you choose to lock them.

Sign a PDF free, without uploading it