Digital Stamp Generator

Stamp Your PDFs the Way a Paper Stamp Marks a Page

For centuries an office stamp has been a fast way to say something about a document without rewriting it: that an invoice has been settled, that a contract has been approved, that a page is only a working draft, or that its contents are not to be shared. The ink mark carries authority because it is recognisable at a glance and sits right on top of the content it refers to. This tool brings that same idea to the PDFs you handle every day. You open your document, drop your own stamp or signature image onto it, slide it into exactly the right spot, and save a new copy with the mark baked in. Because it works on a real PDF rather than a printed sheet, the result is clean, repeatable and easy to email.

What Document Stamps Are Used For

A stamp is shorthand. Instead of typing a sentence and hoping the reader notices it, you place a bold visual marker where it cannot be missed. The most common business and administrative uses include:

• PAID on an invoice or receipt, so accounts and clients can see at once that a balance has been cleared.
• APPROVED on a contract, purchase order, design proof or expense form, signalling that a reviewer has signed off.
• DRAFT on a document still under revision, to stop an unfinished version being mistaken for the final one.
• CONFIDENTIAL on sensitive material, as a clear reminder that the contents should not be forwarded or printed casually.
• RECEIVED, URGENT, VOID or a dated stamp, which administrative teams use to log, prioritise or cancel paperwork.
• A scanned signature, which behaves like a stamp here: a transparent image you drop onto a signature line to authorise a letter or form.

Because you supply the stamp image yourself, the wording and design are entirely up to you. A small business can apply its own circular company seal, an accounts clerk can reuse a tidy PAID graphic, and an individual can place a neat scan of their handwritten signature.

How to Apply a Stamp to Your Document

The tool walks through three short steps. First, upload the PDF you want to mark and the stamp or signature image you want to use; a transparent PNG gives the cleanest result because the background of the page shows through around the mark. Second, click on the page preview to place the stamp, then drag it to the precise position you want, and use the size and opacity sliders to scale it and decide how strongly it sits over the text. You can add more than one stamp, recolour the mark, or clear them all and start again. Third, generate and download a fresh PDF with the stamps merged into the page, ready to send or archive. If you just want to see how it behaves, the Try Sample Files button loads a demonstration document and a ready-made APPROVED stamp so you can experiment before using your own files.

Designing a Stamp That Reads Clearly

A stamp only works if people can read it instantly, so legibility matters more than decoration. A few practical pointers:

• Keep the wording short. One strong word such as PAID or APPROVED reads from across a desk; a long phrase does not.
• Use a bold, simple typeface. Heavy block lettering survives scaling and printing far better than thin or decorative fonts.
• Pick a colour that contrasts with the page. Traditional red or blue stands out against black body text without hiding it; the colour control lets you match a house style.
• Favour a transparent background. A solid rectangle blocks whatever is beneath it, whereas a transparent PNG lets the underlying content stay visible around the letters.
• Lower the opacity for a watermark feel. Reducing opacity turns a stamp into a softer overlay you can lay across an entire page, which suits DRAFT or CONFIDENTIAL markings.

Placement Tips

Where you put a stamp changes how it is read. A PAID or APPROVED mark usually goes near the top corner or across the relevant figure, close to what it confirms. A signature belongs on or just above the signature line. A CONFIDENTIAL or DRAFT notice is often placed diagonally across the centre of the page, larger and semi-transparent, so it is impossible to overlook on every printout. Avoid covering the exact numbers, names or clauses a reader needs; the point of a stamp is to add a message, not to obscure the document. Drag the stamp slightly clear of dense text, and use the size slider so it is prominent without dominating the whole page.

Printed and Digital Documents

The PDF you download already has the stamp built into the page, so it looks identical whether it stays on screen or goes to a printer. For a digital workflow you can email or upload the stamped file directly, and the mark travels with it. If you need a paper copy, simply print the downloaded PDF and the stamp prints along with everything else, exactly where you positioned it. This is more consistent than stamping by hand, since every copy is marked in the same place at the same size, and you can reproduce the same stamp across many documents without the mark smudging or fading.

How It Works in Your Browser

Everything here happens on your own device. When you choose a PDF and a stamp image, they are read directly by your browser and the stamped document is assembled locally using in-browser PDF code. Your files are never uploaded to a server, never stored by us, and never seen by anyone else. The moment you close the tab, the document and the stamp are gone from the page unless you saved the result yourself. That matters most for the very files people stamp, which are often invoices, contracts and signed forms that you would not want passing through someone else's system. Because the work is local, the tool is also quick and keeps functioning even on an unreliable connection.