Add a Signature or Stamp Image to a PDF
Paste a signature or stamp image onto your PDF and save the result. Drag the image into place on the preview, adjust its size and opacity, and stamp every page, just the current page, or the pages you choose. Transparent PNGs from the Signature Pad or the Seal Stamp Generator work well. Your file never leaves your device. For page numbers or text watermarks, use the PDF Page Number & Watermark tool.
🔒 Runs in your browser · Your data is never sent to a server
This tool only places an image on the page. It is not a digital signature (no certificate), cannot verify who signed or detect later changes, and is not suitable for documents that legally require an electronic signature.
You can also drag and drop a PDF file here
Pick a single .pdf file.
You can also drag and drop an image here
Pick one image such as PNG or JPEG. A PNG with a transparent background works best.
Set position and size
Drag the image on the preview to move it and use the square handle at its bottom-right corner to resize. With the image focused, the arrow keys nudge it. On a phone, move it with your finger (the page cannot scroll while your finger is on the image).
Result
How to use
- Choose a PDF file.
- Pick the image to place with "Choose a signature or stamp image".
- Drag the image on the preview to position it and fine-tune it with the "Size" slider.
- Under "Pages to stamp", pick "All pages", "This page only" or "Choose pages".
- Press "Add to PDF and export" and download the result.
Please note
- This tool only places an image on the page. It is not a digital signature or a timestamp, so it cannot verify identity with a certificate or detect later changes. For documents that legally require an electronic signature, use a certified e-signature service.
- The image is saved as a picture on top of the original content. Software that can edit PDFs can move or delete it, so it does not protect a document from tampering.
- When you stamp several pages, the image is placed at the same relative position and width on each page. To use different positions, export in separate passes.
- Adding an image to a PDF that already carries a digital signature rewrites the file and can invalidate the original signature.
- Images other than PNG and JPEG are converted to PNG. A transparent PNG keeps the area around your signature or seal clear. Password-protected PDFs cannot be processed.
Glossary
Digital signature
A certificate-based mechanism that shows who signed a document and whether it changed after signing. Placing a picture of a signature is a different thing.
Transparent PNG
A PNG with a see-through background. Used for signatures and seals, it does not cover the content beneath the strokes.
Opacity
How solid the image looks. At 100% it is fully opaque; lower values let the content underneath show through.
FAQ
Is this a digital (electronic) signature?
No. It only places a picture of a signature or seal on the page. There is no certificate, so it cannot verify who signed or detect later changes. For contracts that legally require an electronic signature, use a certified e-signature service. This tool suits documents where a stamped image is enough, such as internal sign-offs.
How do I avoid a white box around my signature?
Use a PNG with a transparent background. A transparent PNG from the Signature Pad or the Seal Stamp Generator keeps the content around the strokes visible. JPEG has no transparency, so it is placed as a solid rectangle.
Can I stamp the same signature on several pages?
Yes. Under "Pages to stamp" choose "All pages", "This page only" or "Choose pages" (for example 1-3, 5). The image goes at the same relative position and width on each page, so on a PDF with mixed page sizes its real size changes with the page.
Can I move or remove the signature after exporting?
Not with this tool. To start over, choose the original PDF again. Note that software that can edit PDFs can move or delete the placed image, so it does not protect a document from tampering.
Are my PDF and image uploaded anywhere?
No. Both the PDF and the signature image are processed in your browser and never leave your device. A signature is personal data, so on a shared computer close the tab afterwards and be careful with the downloaded file.
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