How to Stamp, Add Images & Mark Up a PDF

Sometimes a PDF needs something added on top of the page — an “APPROVED” stamp, a logo in the corner, initials, or a header repeated across every page. Rather than reprinting or rebuilding the document, you can lay these marks directly onto the existing PDF. Here's the toolkit for stamping and marking up a PDF in your browser.

Add a stamp or an image

The Stamp tool drops a text or graphic stamp — “APPROVED,” “PAID,” a date, or a seal — onto the page where you want it. To place a logo, signature graphic, or any picture, the Add Image tool lets you position an image exactly on the page.

Overlay one PDF on another

The Overlay tool lays one PDF over another — perfect for stamping letterhead, a background template, or a repeated header/footer across every page of a document at once.

Which mark-up tool

Tips

• Use a transparent PNG for logos. A logo on a white box covers the page; a transparent background sits cleanly on top.
• Layer in the right order. Add stamps and images first, then a watermark and page numbers, so nothing important gets covered.
• Lock it in when done. Once your marks are placed, run the file through the Flatten tool so everything is fixed to the page.

Summary

Stamping, adding a logo, or overlaying letterhead lets you finish a PDF without rebuilding it. Use the stamp for text marks, add-image for graphics, and overlay for page-wide templates — then flatten to lock it all in. Every tool runs free and private in your browser.