Watermark PDF

Add text or image watermarks to PDF files instantly using a modern visual document workspace — adjust opacity, rotation, position, and target specific pages.

Text WatermarksLogo WatermarksLive PreviewBrowser-BasedSecure Processing

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How to add a watermark to PDF

1

Upload your PDF

Drag and drop or browse to load a PDF up to 50 MB. The first page renders instantly in the preview pane.

2

Choose text or logo

Switch the Text/Logo toggle. Text mode supports CONFIDENTIAL/DRAFT/SAMPLE presets, custom typing, font choice, and color. Logo mode accepts PNG or JPG.

3

Style the watermark

Tune opacity, rotation, position (center, diagonal, tiled, or corners), and font size or logo scale. Every change re-renders the live preview.

4

Target pages and export

Apply to all pages, first only, or a specific range like '1-5, 10'. Set a filename and hit Apply & Download.

Why watermark PDF files

Mark documents confidential

Diagonal CONFIDENTIAL or DRAFT stamps make it obvious the document shouldn't leave its intended audience.

Brand client deliverables

Stamp your company logo into the corner or as a subtle tile across every page of proposals and reports.

Discourage screenshots

Tiled watermarks make any captured screenshot trivially traceable to the leaker.

Protect drafts from misuse

DRAFT or SAMPLE watermarks across pre-release documents prevent stakeholders from quoting unfinished work.

Add page-level provenance

Stamp recipient names or timestamps into the footer so leaked copies can be traced to a specific share.

Batch-brand long documents

Apply the same watermark across hundreds of pages in one pass instead of editing each page individually.

Add logo to PDF guide

Use transparent PNG

Logos with a transparent background blend cleanly into any underlying page content. JPGs include a white box around the artwork — usually not what you want.

Size by page %

The logo slider expresses width as a percentage of the page, so the same setting scales correctly across A4, Letter, and custom page sizes.

Opacity tips

Logos at 50–70% read clearly as a watermark without obscuring text. For full-color branding on cover pages, dial up to 90–100%.

Corner branding

For subtle continuous branding, pick a corner position with 60% opacity and 15-20% logo width. The mark is present without dominating the layout.

Protect PDF documents with watermarks

Watermarks are a deterrent — they don’t physically prevent copying, but they do make casual misuse painful. Combined with our Protect PDF tool for AES-128 password encryption, you get both authentication (only password holders open it) and visible ownership (anyone viewing sees the mark on every page).

Related tools

Protect PDF

Add AES-128 password encryption on top of your watermark for true access control.

Merge PDF

Combine watermarked sections into a single document for distribution.

Split PDF

Extract pages before applying a specific watermark to one section.

Image Watermark

Apply watermarks to JPG/PNG images instead of PDF pages.

Frequently asked questions

Common questions about watermarking PDFs — text vs logo modes, positioning, page targeting, and privacy.

Upload your PDF, pick Text or Logo mode, type your watermark text (or upload a PNG/JPG logo), then tune opacity, rotation, and position. The live preview shows you exactly where the mark will land. Click 'Apply & download' to get the watermarked PDF.

Yes — switch the mode toggle from Text to Logo, upload a PNG or JPG (transparent PNG recommended for clean placement), and drag the size slider to control how wide the logo appears relative to the page. The same opacity, rotation, and position controls work on logos too.

No. The watermark stamping runs entirely inside your browser using pdf-lib for the PDF and pdf.js for the preview. Your file, logo, and the watermarked output never leave your device — safe for confidential or branded documents.

Yes. The 'Apply to pages' section offers three modes: All pages (default), First only (cover-page branding), and Range — type something like '1-5, 10, 12-15' to target specific pages. The preview shows which page is currently visible so you can verify your range.

Yes — the Opacity slider runs from 5% (barely visible) to 100% (fully opaque). For 'CONFIDENTIAL'-style stamps, 25-40% reads as a watermark without obscuring the text underneath. Logos usually look best at 50-70% for the same reason.

Center, Diagonal (centered with -45° rotation), Tiled (3×3 grid across the whole page), and all four corners (top-left, top-right, bottom-left, bottom-right). For diagonal mode, the rotation slider is auto-locked at -45° to keep the angle consistent.

Yes. Watermarks are stamped on top of every page as a new content layer — it doesn't matter whether the page is text, vector graphics, or a scanned image. The original content stays untouched underneath the watermark.

The preview is a fast visual approximation that uses CSS positioning. Final pixel placement, font kerning, and image sharpness in the exported PDF come from pdf-lib's vector rendering — which is typically cleaner than the preview. Position, rotation, and relative scale match closely.