Can I use my own custom text for the watermark?

Yes — enter any text you like, such as "DRAFT," "CONFIDENTIAL," your name, or a company label.

Does the watermark appear on every page?

Yes — the same watermark is stamped across every page of the document in one operation.

Can I control how visible the watermark is?

Yes — adjust the opacity to make it more subtle or more prominent, and the font size to control how large it appears.

Does this tool work without an internet connection?

No — as a browser-based tool, it needs an internet connection to upload your file and process it on our server.

Is there a true offline version of this tool?

Not currently — for a fully offline workflow, you would need a desktop application installed on your device ahead of time.

What if my real concern is privacy, not connectivity?

That's the more common concern in practice — files are processed in an isolated location and deleted automatically shortly afterward.

Security

Watermark PDF Offline

If you're specifically looking for something that works without an internet connection, it's worth being upfront: My PDF is a browser-based tool, so it does need a connection to upload your file and process it on our server, the same as any web application.

Use the Watermark PDF Tool

No registration required
Files deleted automatically
Works in any browser

Why This Matters

What Is a PDF Watermark Tool?

What "offline" usually really means for most people, though, is a concern about privacy rather than a literal lack of internet access — and that part we can address directly: your file is processed in an isolated location and deleted automatically shortly afterward, never stored permanently or shared.

A PDF watermark tool stamps custom text diagonally across every page of a document, at an adjustable size and transparency, without permanently altering the underlying content beneath it. The result is a document that visibly carries a label — "DRAFT," "CONFIDENTIAL," a company name — on every single page, in a way that is difficult to simply crop or edit out.

Step by Step

How to Watermark PDF Offline

Upload Your PDF

Drag in the document you want to watermark, or click to browse and select it.

Enter Your Watermark Text

Type the text you want stamped across every page, and adjust its font size and opacity.

Click Add Watermark

Our server stamps the watermark diagonally across every page, typically within seconds.

Download the Watermarked File

Save your PDF with the watermark applied consistently throughout.

Recommended Tool: Watermark PDF

Stamp text or a logo across every page of a PDF.

Open Watermark PDF

Get Better Results

Tips

Lower the Opacity for Legibility — A lighter, more transparent watermark keeps the underlying content fully readable while still being clearly visible.
Increase Font Size for Emphasis — If the goal is to make the watermark impossible to miss, use a larger font size alongside a higher opacity.
If you genuinely need to work with no internet connection at all — on a flight, for example — a desktop application installed ahead of time is the only real option.
If your concern is privacy rather than connectivity, an online tool with automatic file deletion (like this one) addresses that without needing to install anything.

Avoid These

Common Mistakes

Uploading a file that is already password-protected without unlocking it first — most operations require an unencrypted starting file.
Assuming a converted or compressed file replaces the need for the original — keep your source file until you have confirmed the result looks right.
Not checking the 50 MB upload size limit before starting, then wondering why a very large scan fails to upload.
Searching for "offline" when the real concern is privacy — an online tool with strong deletion practices often solves that just as well as an installed one.