Add Watermark to PDF Online — Free

Stamp a text watermark on every page of your PDF. Mark drafts, confidential copies, or branded documents — processed entirely in your browser.

Choose PDF File

Select a PDF file to add watermark

Select File

PDF only · One file at a time

Custom text watermarks

Add "DRAFT", "CONFIDENTIAL", or your company name across all pages.

Adjustable placement

Control opacity and position for subtle or prominent marks.

Secure — files never uploaded

Your files are processed locally in your browser — nothing is uploaded to our servers.

How to watermark a PDF online

Add a text watermark in four steps.

  1. 1

    Upload your PDF

    Select the document to watermark.

  2. 2

    Enter watermark text

    Type the label or branding text to apply.

  3. 3

    Apply watermark

    Preview and stamp every page in your browser.

  4. 4

    Download

    Save your watermarked PDF.

Everything you need to watermark PDFs

Protect drafts and mark ownership without cloud processing.

Start immediately — no fuss

Use Add Watermark directly in your browser. No sign-up, no software install.

Works on any device

Desktop, tablet, or phone on Windows, Mac, Linux, iOS, and Android.

No watermarks on output

Download clean results on Free and Plus — no branding stamped on your files.

100% browser-based privacy

Your files are processed locally in your browser — nothing is uploaded to our servers.

Combine with other PDF tools

Chain tools together — merge, compress, convert, protect, and sign in one workflow.

Optional Premium upgrade

AstraPDF Plus removes file-size caps, fair-use limits, and ads — still 100% private in your browser.

When to watermark a PDF

Draft documents

Mark work-in-progress before review.

Confidential files

Label sensitive internal documents.

Before sharing

Brand client deliverables with your company name.

After merging

Watermark a combined report.

Add Watermark FAQs

Common questions about add watermark with AstraPDF.

Need more power?

Watermark PDFs without limits

AstraPDF Plus removes file-size caps, fair-use limits, and ads — still 100% private in your browser.

Get Premium

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E-Signature

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Need more power? See our pricing plans or browse all tools on the homepage.