Mark your documents as yours
A watermark signals ownership and status: CONFIDENTIAL on a draft, DRAFT on a proposal, or a company name across a shared deck. The Add Watermark tool overlays your chosen text — or an image such as a logo — diagonally across every page of the PDF so it is clearly marked from front to back.
The overlay is applied in your browser using pdf-lib, so your document is processed locally and never uploaded. That is the right approach for the very files people watermark most: confidential contracts, unreleased reports, and proprietary material you do not want sitting on someone else's server.
Adjustable opacity and placement
You control how the watermark looks. Set the opacity so it is bold enough to notice but light enough to read the text underneath, and the mark is placed diagonally across the full page for consistent coverage. Text watermarks render as sharp vector type, while an image watermark is scaled to sit neatly over your content.
Only the watermark you choose is added — Pixohub never stamps its own branding onto your file. The tool is free, requires no account, and has no page limits beyond your device's memory. It works on both desktop and mobile browsers.