Add a stamp to a PDF online, free

Upload a photo of your company stamp or seal (the paper is removed), make a text stamp, or use Approved, Paid, Received, Verified or a date stamp. Place it anywhere and download.

Add stamp: common questions

Where are my stamps kept?

In this browser only, in your stamp library, so they are there next time. They never leave your device unless you place one on a PDF you then save.

Is there a limit on how many PDFs I can stamp?

No. There is no daily or monthly limit and no account, and it stays free for life: use it as often as you like. Files up to 50 MB in all are processed on ScalePDF’s server; bigger ones are processed right on your device, which can take a little longer.

How do I get a clean stamp from a photo?

Stamp it on plain white paper, take the photo in good light from straight above, and upload it. ScalePDF removes the paper and keeps the ink in its colour. Crop close to the stamp for the best result.

Is a stamp on a PDF legally valid?

A stamp image shows who approved a document, but it is not a digital signature. Where a law or a client needs a certified digital signature, use one.

Is my file uploaded?

Only while it is being processed. Your file goes to ScalePDF’s server over an encrypted connection, is worked on in memory, and is deleted the moment the result comes back. Nothing is stored, logged or shared.