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Watermark PDF

Stamp a custom text watermark across every page of your PDF — opacity, color and angle.

100% private — watermarked in your browser, never uploaded.

Why you’ll love Watermark PDF

Instant & freeNo signup, no paywall, no limits — Watermark PDF works the moment the page loads.
Completely privateEverything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any deviceFully responsive and touch-friendly — use it on your phone, tablet or desktop.
Never uploadedYour files are processed entirely in your browser — they never touch a server.

How to use it

  1. 01

    Open it

    No download and no login — the tool is ready right at the top of this page.

  2. 02

    Use it

    Enter your details or start interacting. Everything updates live as you go.

  3. 03

    Get your result

    Copy, download or share your result in a single tap. That’s it.

About Watermark PDF

Add a watermark PDF stamp to every page of your document in seconds. Our free tool lets you customize the text, opacity, color, and angle to suit your needs. Whether you're marking drafts, protecting intellectual property, or adding branding, watermarking your PDF takes just a few clicks—no account required.

Place text watermarks diagonally or at any angle across your PDF pages. Control the transparency level to keep your document readable while making the watermark visible. Choose any color for the text to match your branding or visibility needs. The tool works entirely in your browser, so your file never leaves your device.

Watermark PDF files securely and instantly with this straightforward online utility. Upload your PDF, set your watermark text and styling, and download the result immediately. Perfect for protecting work-in-progress documents, marking sensitive files as confidential, or stamping approvals. Free, fast, and completely private.

Popular uses

  • ✦ Mark draft documents and work-in-progress files to prevent accidental sharing of unfinished content
  • ✦ Stamp PDFs as Confidential or Internal Use Only to protect sensitive business documents
  • ✦ Add copyright or watermark PDF files with your company name to protect intellectual property
  • ✦ Mark approved or finalized versions of contracts and agreements with date stamps or approval watermarks
  • ✦ Prevent unauthorized copying or redistribution by visibly stamping documents across every page

Frequently asked questions

Is it free to watermark a PDF?
Yes, this tool is completely free. There are no hidden charges, subscriptions, or limits on how many PDFs you can watermark. Upload your file, customize your watermark, and download—no account or payment required.
How do I add a watermark to a PDF?
Upload your PDF file to the tool, enter your watermark text, and adjust the opacity, color, and angle as needed. Click the watermark button, and your file will be processed in seconds. Download your watermarked PDF instantly.
Can I control the watermark opacity and angle?
Yes, you have full control over the watermark appearance. Adjust the opacity to make it subtle or bold, choose any color, and set the angle to display the text diagonally or horizontally. This lets you stamp PDF files exactly how you want them.
Will my PDF be stored or shared?
No. Your file is processed entirely in your browser and never uploaded to a server. Your PDF stays on your device throughout the watermarking process, ensuring complete privacy. The file is yours alone.
Is Watermark PDF free to use?
Watermark PDF is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Are my files uploaded anywhere?
No — everything happens locally in your browser, on your device. Your PDFs and images never leave your computer, so even sensitive documents stay completely private.

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