What is stamping a PDF?
Overlaying a stamp image or text — like "Approved" or a signature mark — onto a PDF document. It's a common way to record internal approval or a "checked" mark on a PDF without printing it, stamping it on paper, and scanning it back in. Note that an image-based stamp has no legal standing as an electronic signature, so for contracts or documents requiring identity verification, use a proper e-signature service instead.
How to use it
① Upload a PDF
Upload the PDF file you want to stamp. You can process multiple PDFs together.
② Choose a stamp type and size
Pick Text and type something like "Approved" or a name, or pick Image upload to use a stamp image in SVG, PNG, JPEG, or GIF format. Size is adjustable as a percentage of the page width.
③ Position it, select pages, and apply
Drag the stamp in the preview to set its position. For multi-page PDFs, click each page to toggle the stamp on or off. Once everything is set, click Apply to process and download.
What makes this tool different
- Supports both text stamps and image stamps (SVG/PNG/JPEG/GIF)
- Drag to position, resize as a percentage of page width
- Works across multiple pages and multiple PDFs, with per-page on/off toggling
- Your PDF's contents are never uploaded — everything is processed in your browser
- The first page is free; after that, ¥50 for 30 pages
Frequently asked questions
Is this stamp legally binding?
No. This tool overlays an image or text as a stamp, which carries no legal weight as an electronic signature proving a contract was agreed to. It's intended for visual purposes like recording an internal approval or a "checked" mark.
What image formats are supported for the stamp?
SVG, PNG, JPEG, and GIF. The file must be 5MB or smaller.
Is my PDF uploaded to a server?
No. Loading the PDF and applying the stamp both happen entirely in your browser, so the contents of your PDF are never sent anywhere.
Is it free?
The first page is free. After that, it's ¥50 for a bundle of 30 pages.