Watermark PDF
Add text watermarks to your PDF
At a glance
- Use this page to watermark files quickly with a guided workflow.
- Accepted input: .pdf.
- Output: downloadable file generated in-browser for supported workflows.
- Upload Choose your file
- Process Runs locally
- Download Save result
Drop your file here
or tap to browse · accepts .pdf
Runs in your browser. No file uploads for supported tools.
Best on desktop for 100MB+ files · mobile recommended under ~100MB.
How local processing works
- Your PDF is processed in your browser using local JavaScript libraries.
- PDFWhisk does not upload your file to a processing server for supported tools.
- Only normal page assets load from the site (HTML/CSS/JS), not your document contents.
Selected files
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Support: hello@pdfwhisk.com (reply in ~24h)
Security & privacy detailsHow this tool helps
Add professional text watermarks to your PDF documents. Type any text - 'CONFIDENTIAL', 'DRAFT', 'SAMPLE', your company name, or any custom text. Customize the font size, color, opacity, and rotation angle. Apply the watermark to all pages or just selected ones. Preview how it looks before downloading. Ideal for marking documents as drafts, protecting intellectual property, branding reports, or labeling confidential files. The watermark is rendered as a semi-transparent text overlay that's visible but doesn't obscure the document content. All processing happens locally in your browser. Use it when you need to add page numbers, protect pdf, compress pdf.
Best for
How it works
PDFWhisk uses PDF-lib to draw text on each page of your PDF with specified opacity, rotation, and positioning. The text is centered on the page and rendered with transparency. Original page content remains untouched beneath the watermark.
Frequently asked questions
Can I customize the watermark text?
Yes. Type any text you want - common choices include 'CONFIDENTIAL', 'DRAFT', 'DO NOT COPY', or your company name. There's no character limit.
Can I adjust the transparency?
Yes. Use the opacity slider to make the watermark more or less transparent. Lower opacity lets the document content show through clearly while the watermark remains visible.
Can I watermark only certain pages?
Yes. Choose to apply the watermark to all pages, odd pages only, even pages only, or specific page numbers.
Can I use an image as a watermark?
The current version supports text watermarks. Image watermarks (like logos) are available for Pro users.
Can the watermark be removed later?
The watermark is permanently embedded in the PDF. Save your original file if you may need an unwatermarked version later.
What to do next
Chain tools together for a complete workflow.