PrivatePDF

Stamp an image onto a PDF

A scanned signature, a letterhead logo, an approval stamp, a watermark that is a picture rather than a word — all the same operation: put an image on the page and put it in the right place. Drag it where it belongs and watch it land, rather than exporting to find out.

or drop a file anywhere on this panel

opened locally · 0 bytes sent

How it works

  1. 01Open the PDF.
  2. 02Choose a PNG or JPEG — a photographed signature on white works well.
  3. 03Pick a corner, or drag the image on the page to place it exactly.
  4. 04Export.

It keeps its shape

You set the width; the height follows the image’s own proportions. A signature squashed into a square is the most recognisable way an otherwise-correct stamp looks wrong, and nobody should have to work out the arithmetic to avoid it.

Stored once, however many pages

A logo on every page of a two-hundred-page document is embedded a single time. Tools that embed per page produce files many times larger than they need to be for no visible benefit.

This is not a cryptographic signature

It draws a picture of a signature onto the page. A recipient cannot verify who applied it, and neither can we. Cryptographic signing needs a certificate and a trusted timestamp, which is a different feature and inherently requires a network — so it is not something a tool built around never contacting one can offer.

Your signature is not uploaded either

The image stays in your browser alongside the document. A scanned signature is precisely the kind of thing that should not be sitting in a stranger’s upload folder.

Questions

What image formats work?
PNG and JPEG — those are what a PDF can carry directly. PNG with transparency is the right choice for a signature, so the page shows through around the strokes. Anything else is refused when you pick it, rather than failing later at export.
Can I draw a signature instead of uploading one?
Not yet — a drawing pad is the natural next step. For now, signing a sheet of paper and photographing it works well, especially as a PNG with the background removed.
Can I put it on some pages but not others?
Today it is the last page or every page, which covers signing and watermarking respectively. Per-page placement is planned.
Is it legally binding?
That depends entirely on your jurisdiction and the agreement, and we cannot advise on it. What this does technically is draw an image onto the page; it attaches no verifiable identity.