Is my PDF uploaded to add the watermark?

No. The file is opened, stamped and saved inside your browser tab and never leaves your computer. There is no upload endpoint on our side for it to go to, which is also why a large document is stamped in seconds rather than spending a minute on your upload speed.

Can the watermark go behind the text instead of over it?

Not at the moment, and the tool says so rather than pretending. The PDF library we use can only draw on top of a page, so the stamp sits over it. Opacity is what does the job instead - it starts at 35% and drops to 20% or 10%, where the page underneath reads normally and the stamp is still unmistakable.

Can I use my own logo?

Yes, as a PNG or JPG. It is placed as a percentage of the page width rather than a fixed size, so the same logo at the same setting looks right on an A4 invoice and on a 4x6 label without you working out the millimetres.

Will it work with a rupee sign or a name in Hindi?

A rupee sign is drawn as Rs., because the built-in PDF fonts do not carry that glyph. Hindi and other Indian scripts cannot be drawn by those fonts at all - so rather than printing empty boxes, the tool tells you what it cannot draw and asks you to type the name in English or stamp your logo instead.

Does it remove a watermark that is already there?

No. This adds one. Taking an existing watermark out of a PDF means rewriting the page's own drawing instructions, which is a different job and not one this tool does.

Can I watermark a whole batch of files at once?

One file at a time for now. If you need one stamp across several documents, merge them first with the merge tool, watermark the result, and split it back if you need the pieces separate.

Add a watermark to a PDF

A watermark is how a document says what it is before anyone reads it. A quotation that goes out without DRAFT on it comes back as an order at the draft price. A duplicate invoice reprinted for an accountant, with nothing to mark it, is a second invoice as far as anyone looking at the file can tell. And a catalogue sent to a wholesaler is a catalogue somebody else can send on with their own cover.

This stamps text or your logo across every page of a PDF and changes nothing else about it. The preview is your actual page, drawn with the same geometry the exporter uses, so where the stamp sits on screen is where it lands in the file - including on pages that carry a rotation, where a 45-degree stamp has to be 45 degrees to the reader rather than to the page.

Your quotation or invoice

DRAFT

The same file, marked

Open the watermark tool Needs an account. The trial is free and takes a WhatsApp code.

How it works

Add the PDF. One file at a time. Its pages appear as a grid and the first one is drawn full size in the preview, so you are placing the stamp against the real document rather than a blank rectangle.
Type the text, or bring a logo. DRAFT, DUPLICATE, PAID, your firm's name - or a PNG or JPG of your logo, which is sized as a percentage of the page width so it lands the same on A4 and on a 4x6 label.
Place it and set how loud it is. Seven positions or tiled across the whole page, any angle in five-degree steps, any colour, and five opacity settings from barely-there at 10% up to a strong 80%. Opacity is the control that matters: the stamp is drawn over the page, so it is what keeps the invoice underneath readable. It starts at 35%, turned 45 degrees, in grey.
Choose the pages. Every page, or a range you type or click. A quotation usually wants it on all of them; a catalogue often only wants it on the cover.
Export. You get a new PDF with the stamp on it. The original is untouched on your disk, and pressing Export twice does not stack two watermarks - the pages are copied fresh each time.

What it handles

Text or an image: a PNG or JPG logo, sized as a percentage of the page width
Seven positions - centred, or any corner and edge - or tiled across the page
Five opacity settings, 10% to 80%, so the page underneath stays readable
Helvetica, Times or Courier, at whatever size and angle you set
A live preview of your real page, placed by the exporter's own geometry
Every page, or a range you type or click
Rotated pages are handled: 45 degrees means 45 degrees as the reader sees it
Exporting twice does not stack two stamps on the same page
Nothing is uploaded - the PDF is read and written inside your browser tab

Your files stay on your computer

This runs inside your browser tab. The file is read and written on your own device and is never uploaded - not the order PDF, not the customer names and addresses printed on it. There is no upload endpoint to send it to.

Questions

Is my PDF uploaded to add the watermark?: No. The file is opened, stamped and saved inside your browser tab and never leaves your computer. There is no upload endpoint on our side for it to go to, which is also why a large document is stamped in seconds rather than spending a minute on your upload speed.
Can the watermark go behind the text instead of over it?: Not at the moment, and the tool says so rather than pretending. The PDF library we use can only draw on top of a page, so the stamp sits over it. Opacity is what does the job instead - it starts at 35% and drops to 20% or 10%, where the page underneath reads normally and the stamp is still unmistakable.
Can I use my own logo?: Yes, as a PNG or JPG. It is placed as a percentage of the page width rather than a fixed size, so the same logo at the same setting looks right on an A4 invoice and on a 4x6 label without you working out the millimetres.
Will it work with a rupee sign or a name in Hindi?: A rupee sign is drawn as Rs., because the built-in PDF fonts do not carry that glyph. Hindi and other Indian scripts cannot be drawn by those fonts at all - so rather than printing empty boxes, the tool tells you what it cannot draw and asks you to type the name in English or stamp your logo instead.
Does it remove a watermark that is already there?: No. This adds one. Taking an existing watermark out of a PDF means rewriting the page's own drawing instructions, which is a different job and not one this tool does.
Can I watermark a whole batch of files at once?: One file at a time for now. If you need one stamp across several documents, merge them first with the merge tool, watermark the result, and split it back if you need the pieces separate.

Related tools

Open the watermark tool