PDF Watermark

What is PDF Watermark?

Add professional watermarks to PDF documents directly in your browser.

Supports both text watermarks (CONFIDENTIAL, DRAFT, SAMPLE, or any custom text) and image watermarks (company logos, stamps, signatures in PNG or JPG format). Choose from three font families (Helvetica, Times Roman, Courier) and place watermarks above or below page content. Configure font size, opacity, rotation angle, color, scale, and position. Supports single placement (center, corners) or tiled repeat pattern for full-page coverage. Apply watermarks to all pages, first page, last page, or a custom page range. Includes industry-standard presets for common use cases. All processing runs client-side - your PDF files never leave your device.

Need this in your code, not in a tab?

This tool stamps a watermark onto a PDF entirely in your browser, which is the right answer when a person is clicking the button. It is the wrong answer for invoices after checkout, reports on a schedule, or certificates generated per user, because those run without anyone watching.

For that, you want a rendering engine behind an API. PDFPipe is built by the same author as this site: send HTML or a URL, get a print-grade PDF back in about a second. Free for 100 documents a month, no card required.

curl -X POST https://api.pdfpipe.xyz/v1/pdf \
  -H "Authorization: Bearer pp_live_..." \
  -H "Content-Type: application/json" \
  -d '{"html": "<h1>Invoice #4012</h1>"}' \
  --output invoice.pdf

Not sure which approach fits? Browser tools, headless browsers, and PDF APIs compared.