Watermark PDF

Watermark PDF

Stamp a PDF with text such as CONFIDENTIAL or DRAFT, or with your logo. Adjust opacity, angle and position, check the preview, and download — all on your device.

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1. PDF & watermark

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Drop a PDF here

or click to browse

PDF

2. Preview

—
Open a PDF to preview the watermark.
The preview of a watermarked page appears here.
About this tool

About Watermark PDF

Watermark PDF adds a text or image watermark to the pages of a PDF in your browser. Use presets such as CONFIDENTIAL or DRAFT or your own text, or upload a logo, then set the size, opacity, rotation, position and pages before downloading.

A visible watermark tells readers a document is a draft, a sample or confidential, and shows who it came from. It is a labelling tool, not a security feature: watermarks can be removed with PDF editing software.

How to use

Step by step

  1. Open the PDF you want to watermark.
  2. Choose Text and type your wording or pick a preset, or choose Image and upload a PNG, JPG or WebP logo.
  3. Adjust size, colour, opacity and rotation, and pick one of nine positions.
  4. Select all pages or a custom range and check the live preview.
  5. Press Add watermark, then Download PDF.
Key features

What it offers

  • Text watermarks with CONFIDENTIAL, DRAFT, COPY and SAMPLE presets
  • Image watermarks from PNG, JPG or WebP, with PNG transparency kept
  • Opacity, rotation from −90° to 90°, size and nine positions
  • All pages or custom page ranges
  • Live preview of the actual output page
  • Upright placement on rotated and landscape pages
Best practices

Tips for best results

  • Use 20–40% opacity so the page underneath stays readable.
  • Use a transparent PNG for logos so no white box appears around them.
  • Text watermarks support Latin characters only; use an image watermark for other scripts.
  • Do not rely on a watermark to protect sensitive content — it can be removed.
  • Check the preview on a busy page as well as a plain one.
Benefits

Why people use it

Clear status

Mark drafts, samples and confidential copies at a glance.

Branding

Add your logo to documents you share.

Readable output

Opacity control keeps the original content legible.

Private

The watermark is added on your device; nothing is uploaded.

FAQ

Common questions

Yes. Switch to Image and upload a PNG, JPG or WebP file. Transparent PNG logos keep their transparency.
CONFIDENTIAL, DRAFT, COPY and SAMPLE. You can also type your own text of up to 100 characters.
Yes. Choose custom pages and enter pages and ranges such as 1-3, 5.
No. A watermark is visible text or an image placed on top of each page. It signals ownership or status, but it can be removed with PDF editing software, so it is not a security measure.
Text watermarks use the standard Helvetica PDF font, which supports Latin letters, numbers and common punctuation. For other scripts, use an image watermark.
Yes. The watermark is drawn on top with the opacity you choose, and the original text stays selectable.
No. The watermark is added in your browser with pdf-lib and your original file is not changed.
Private by design

This runs entirely in your browser

No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.

Install Toolisco Add it to your device for offline, one-tap access.