Drop a PDF here
or click to choose
processed in your browser · never uploaded
Make a round stamp from a name (or use your own transparent PNG), then click on a page to place it. Drag to move, and the original PDF text stays selectable. Nothing is uploaded.
Drop or click to replace
Add a stamp, seal, or Japanese hanko to a PDF, completely free. Type a name or department and the tool auto-generates a round red seal — pick the color (vermilion, red, maroon, or black) and whether it has a frame. You can also load your own stamp image (a transparent PNG), so a company seal or a scanned signature works just as well. To use it, drag and drop a PDF (or click to choose one), then click anywhere on a page to drop the stamp there. Each placed stamp can be dragged to reposition or removed with "×", and you can add as many as you like across any pages. Adjust the size with the slider. When you click "Download stamped PDF", a new PDF is saved with the stamps layered on top while the original page content is preserved — unlike a redaction tool, pages are not rasterized, so the text stays selectable, searchable, and copyable. Rotated pages are handled too, so stamps land in the correct place and orientation. Generating the stamp, placing it, and writing it into the PDF all happen in your browser with JavaScript (pdf.js / pdf-lib); the PDF and any image are never uploaded, stored, or sent to a server. There's nothing to install and no sign-up, so it's safe for confidential contracts and forms. If you only need the stamp image itself, see the Hanko (Seal) Maker; to truly remove confidential content from a PDF, use PDF Redaction; to strip author and other metadata, use Remove PDF Metadata.
How to use
- Drag and drop a PDF. You can also click to choose a file.
- Use "From name" to type a name and build a round seal, or "Use an image" to load your own transparent PNG stamp. Adjust the color, frame, and size.
- Click where you want the stamp on a page. Drag a stamp to move it, use "×" to remove it, and add as many as you like across pages.
- Click "Download stamped PDF". The stamps are layered on while the original text is preserved, and your PDF is never sent anywhere.
FAQ
Does adding a stamp make the original text unreadable?
No. This tool keeps the original PDF content intact and only layers the stamp image on top. Unlike a redaction tool, pages are not flattened to images, so the text stays selectable, searchable, and copyable. You simply get a PDF with the stamp added.
How do I get the stamp itself?
Two ways. "From name" auto-generates a round seal from a name or department you type (choose the color and frame). "Use an image" lets you load your own transparent PNG — a company seal or a scanned signature saved as a transparent PNG can be placed directly.
Can I move or resize a stamp after placing it?
Yes. Each placed stamp can be dragged freely, and the slider sets the size. Remove any stamp with "×". You can add as many stamps as you like across multiple pages — handy for stamping every page of a contract.
Is the PDF I load uploaded to a server?
No. Rendering the pages (pdf.js), generating the stamp, and writing it into the PDF (pdf-lib) all run in your browser with JavaScript. The PDF and any image are never uploaded, stored, or sent to a server, and there's nothing to install, so it's safe for confidential documents.
What if I just want the stamp image, or need to redact or strip metadata?
To make a transparent-PNG seal on its own, use the Hanko (Seal) Maker. To truly remove confidential content from a PDF, use PDF Redaction. To strip a PDF's author and other metadata, use Remove PDF Metadata.