Preview only — your original file is unchanged until you click "Add Watermark"
Need to stamp "CONFIDENTIAL," "DRAFT," or your company name across a PDF? Flipper File's free PDF Watermark Adder lets you overlay any text directly onto every page of your PDF — right in your browser. No uploads, no software, no login required.
How to Add a Watermark to a PDF
- Click Choose PDF File and select the PDF you want to watermark.
- Type your watermark text (e.g. "CONFIDENTIAL", "DRAFT", your name or company).
- Customize the font size, color, opacity, rotation, and position.
- Click Add Watermark to process the file instantly in your browser.
- Click Download PDF to save the watermarked file to your device.
Why Use Flipper File to Watermark a PDF?
- 100% free — no account needed. Watermark as many PDFs as you want without signing up or paying anything.
- Your file never leaves your device. All processing happens locally in your browser using pdf-lib. Nothing is uploaded to any server.
- Full customization. Control the watermark text, font size, color, opacity, rotation angle, and page position.
- Applies to every page. The watermark is stamped across all pages automatically — not just the first.
- No watermarks on your watermarks. Unlike some tools, Flipper File doesn't add its own branding to your output.
- Works on any device. Desktop, tablet, or phone — no software installation required.
Frequently Asked Questions
Can I watermark a PDF without Adobe Acrobat?
Yes. Flipper File's PDF Watermark Adder works entirely in your browser using open-source technology, so you don't need Acrobat, Adobe Reader, or any paid software.
Is my PDF uploaded to your servers?
No. Your file never leaves your device. The watermarking happens client-side using JavaScript (pdf-lib), so there's zero risk of your document being stored or accessed by anyone else.
Can I add a watermark to a scanned or image-based PDF?
Yes. Since the watermark is overlaid as a text layer on top of the existing pages, it works on both text-based and scanned/image PDFs.
Can I choose where the watermark appears?
Yes. You can position the watermark in the center of the page or choose from predefined positions. You can also control the rotation angle (e.g. diagonal at 45°) and opacity so it doesn't obscure your content.
Does the watermark appear on every page?
Yes. The watermark is automatically applied to every page in the document.
What fonts and colors can I use?
You can choose font size and enter any hex color code. The tool uses the standard Helvetica font built into PDF files for maximum compatibility.
Can I add an image watermark (like a logo)?
The current version supports text watermarks only. For image watermarks, see our PDF Editor which supports image overlays.
How large a PDF can I watermark?
There's no enforced file size limit — the tool runs in your browser, so performance depends on your device. Most PDFs under 50MB process quickly.