About Watermark PDF
Watermark PDF stamps text or an image (PNG/JPG logo) across every page. Control opacity, rotation, color, position, and font size. A tiled mode repeats the watermark across the full page for sensitive documents like CONFIDENTIAL or DRAFT.
Use it to brand client deliverables with your logo, mark a draft contract, or stamp NDA-bound documents before sharing.
All processing is local. Your branding assets and confidential PDFs never touch a server.
How to watermark pdf in your browser
- 01Open the watermarker
Visit pdfvibe.app/tools/watermark.
- 02Drop your PDF
Drag the file in.
- 03Pick text or image
Type the text (e.g. CONFIDENTIAL) or upload a PNG/JPG logo.
- 04Style it
Set opacity, rotation, color, font size, and position. Optionally enable tiled mode.
- 05Download
Save the watermarked PDF. The original is untouched.
Frequently asked questions
Can I use a transparent PNG logo?
Yes. PNG transparency is preserved and combined with your opacity setting.
Tiled watermark for confidential docs?
Yes. Toggle Tiled mode to repeat the mark across the page.
Watermark only some pages?
Yes. Use the page range field to limit which pages get stamped.
Will it lower text quality?
No. Page content is untouched; the watermark is overlaid via pdf-lib.
Is the file uploaded?
No. Watermarking is fully client-side.
Most online PDF tools — Adobe Acrobat Online, iLovePDF, Smallpdf — upload your file to their servers, run the operation, then send the result back. PDFVibe runs the same operation in your browser using WebAssembly and pdf-lib. The file never travels anywhere. Open your browser’s Network tab while using Watermark PDF and you’ll see no outbound file transfers.