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Watermark PDF

Stamp text or an image watermark across every page.

Watermark PDF

Runs in your browser

Drop files here or click to browse

Your files are processed privately.

How to watermark pdf

  1. 1

    Upload your PDF.

  2. 2

    Type your watermark text and set opacity & angle.

  3. 3

    Download the watermarked PDF.

Stamp a watermark across every page of your PDF

Watermark PDF stamps text like CONFIDENTIAL, DRAFT, PAID or your brand name across every page of a document — with full control over opacity, angle, size and position. A well-placed diagonal watermark deters unauthorized reuse, marks document status at a glance, and brands everything you send out. Processing is local to your browser, so even sensitive drafts stay private while being marked.

Protect and brand in one step

Unwatermarked proposals get forwarded, copied and reused without credit. A subtle 15%-opacity watermark keeps your ownership visible without hurting readability. Set it once, apply to all pages, download — free, instant, and with no third party ever seeing your file.

Why use Codesala's free watermark pdf tool

Any text stamp

CONFIDENTIAL, DRAFT, brand names — your words, your style.

Opacity & angle control

From bold diagonal stamps to whisper-subtle marks.

All pages at once

Applied consistently across the whole document.

Position options

Center, corners or custom placement.

In-browser privacy

Sensitive documents are watermarked locally.

Free & unlimited

No signup, no output branding of ours — only yours.

Popular ways people use Watermark PDF

  • Mark proposals CONFIDENTIAL before sending
  • Stamp DRAFT on documents under review
  • Brand sample chapters with your site name
  • Mark invoices PAID for records
  • Deter reuse of portfolio PDFs

Watermark PDF — frequently asked questions

Can I control transparency?

Yes, set any opacity and rotation angle for the watermark.

How do I add a CONFIDENTIAL watermark to a PDF?

Upload the PDF, type CONFIDENTIAL, set opacity (15–30% works well) and a diagonal angle, then download — every page gets the stamp.

Can readers remove my watermark?

The watermark is flattened into the page content, so it can't be switched off in a viewer like an annotation could.

Will the watermark cover my text?

Use a low opacity so content stays readable underneath — you control exactly how strong it appears.

How Watermark PDF handles your file

Watermark PDF runs 100% inside your browser — your document is never uploaded to any server, which makes it one of the most private ways to work with PDFs online. All Codesala PDF tools are free, with no signup, no watermarks and no file limits.

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