FixMyPDF
Watermark PDFFebruary 5, 20263 min read

How to Watermark a PDF on Linux

Add a text watermark to a PDF on Linux without any software install. Free browser tool.

Add a "Confidential" or custom watermark to a PDF on Linux — no pdftk or LibreOffice macro needed. FixMyPDF handles it in the browser.

Open Firefox or Chrome

Navigate to fixmypdf.in/tools/watermark-pdf in your Linux browser.

Upload the PDF

Click "Choose File" and select the PDF from your filesystem.

Enter Watermark Text

Type your watermark (e.g., "Confidential", "Draft"). Set font size, opacity (e.g., 30%), and rotation angle.

Apply and Download

Click Apply. The watermark appears on every page and the PDF downloads immediately.

Alternative to pdftk stamp

pdftk can stamp a background PDF as a watermark but requires creating that background separately. FixMyPDF does it in one step in the browser.

Try Watermark PDF Now — Free

Browser-based, private, and instant. No account or software required.

Open Watermark PDF
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Related Guides

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How to Add a Watermark to a PDF on Mac (Free, No Acrobat)

Add text or image watermarks to a PDF on Mac in Safari or Chrome — no Adobe Acrobat required. Set opacity, size, and position freely.

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How to Add a Watermark to a PDF Free Online (No Account)

Stamp any PDF with a text or image watermark online for free — no account, no watermarks added by the tool itself. Works on any device.

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How to Add a Watermark to a PDF on iPhone (No App Needed)

Stamp a PDF with CONFIDENTIAL, DRAFT, or a custom logo on iPhone in Safari — no app download, no Adobe subscription.

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How to Add a Watermark to a PDF on Windows (Free, No Acrobat)

Stamp a PDF with CONFIDENTIAL, DRAFT, or a custom logo on Windows 10/11 in Chrome or Edge — no Adobe Acrobat, no software install.

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