Sign PDF
Add your signature to a PDF straight from your browser. Handwrite it on the pad with a mouse, finger or stylus, or drop in a saved signature image, then place it on the page you choose. Nine position presets and a width slider set where the signature lands, and near white pixels are stripped away so no white box covers the page. Your PDF is opened and stamped on your device and is never uploaded.
Step 1 - Add your PDF
PDF onlyDrop a PDF here or click to browse
One file at a time. The page count is read as soon as it is added
Step 2 - Add your signature
Draw or uploadSign inside the white area with your mouse, finger or stylus. Treat the pad like a box on a form.
Settings
Pages: -The page the signature is placed on. The maximum is set once your PDF is added.
Bottom right is the usual place for a signature. The margin around the edge stays at 5% of the page width.
Result
Add a PDF to startYour signed PDF will appear here
The signature is placed as a picture on the page. It does not carry a digital certificate, so it is a visual signature rather than a verified one.
How to sign a PDF
Add your PDF
Drop one PDF into the tool or click to browse. The page count is read on your device so the page field knows its range, and nothing is uploaded.
Draw or upload your signature
Sign on the white pad with a mouse, finger or stylus, or switch to Upload and pick a PNG or JPG. Clear the pad and start again at any time.
Place it and download
Set the page, the corner and the width, then click Sign PDF. Check the output size and download the signed file with one button.
Why use Aihangsoft Sign PDF
Real handwriting, no account
Draw a fresh signature each time or keep one saved. There is no sign-up, no email and no activation step before you can sign.
Precise placement
Nine position presets, a page field and a width slider put the signature exactly where the form expects it, without dragging it around by hand.
Private by design
The document and the signature are both handled in your browser. Contracts, offers and IDs are never uploaded, stored or queued on a server.
Built for everyday signing
Sign a contract or a form
Open an agreement, pick the signature line and stamp your name in the bottom right corner. The page count is read first, so a multi page contract stays intact.
Use case: contracts, consent forms, HR paperworkSign on a phone or a tablet
The pad listens to pointer events, so a finger or a stylus draws the same way a mouse does. Scroll while signing is disabled, so the page stays still.
Use case: on the go, touch screens, stylusDrop in a saved signature
Use a scanned or previously drawn signature instead of signing again. Transparent PNG is ideal, and a JPG works because the white background is removed on placement.
Use case: recurring documents, saved signaturesKeep the original quality
The rest of the document is left alone, so text stays selectable, links keep working and images keep their resolution. Only the signature is added as a new picture.
Use case: print, archiving, sending back