Click where the signature belongs
A signature is exactly the thing you should never upload to a random server — which is why the whole signing room lives in your browser. The PDF opens right on this page: every page rendered in front of you. Click the spot where the signature belongs and it lands there; drag it to fine-tune, resize it with the slider, place as many stamps as the document needs — the file itself never leaves your machine.
Draw your signature once in the big pad, and your initials in the small one — contracts love a full signature on the last page and initials on every other. Both stamps are trimmed to the ink automatically, so they sit tight without awkward empty borders. Honest note: this places a handwritten signature image, the digital equivalent of print–sign–scan — it is not a certificate-based cryptographic signature.