When to use Add Watermark
You're sending a draft proposal to a prospect before the deal is signed, and you want every page to carry a diagonal "DRAFT" so no one mistakes it for the final version. Or you're distributing a branded template and need your company name quietly across each page as proof of origin. Upload the PDF, type your watermark text, then dial in the font size, opacity, rotation angle, and color. pdf-lib renders the text directly onto every page on your machine — it's embedded in the page content, not a separate annotation layer, so it shows in every reader and survives printing. Download and send the watermarked copy; the original on your computer stays clean.
- Stamp "DRAFT" diagonally on a proposal before sending for client review
- Add a company name watermark to templates you're distributing externally
- Mark a confidential salary document with "DO NOT SHARE" before forwarding