How to add a watermark
Load the PDF, type the watermark text, adjust the opacity with the slider and click Apply watermark. The text is stamped diagonally, centered on every page.
Ideal for drafts and sensitive documents
Marking a document as DRAFT prevents an unfinished version from being mistaken for the final one; stamping CONFIDENTIAL or the recipient name discourages redistribution. It would be ironic to upload that confidential document to a third-party server just to stamp it: here that never happens.
Opacity that fits your needs
Low opacity (10-30%) keeps the content perfectly readable; high opacity (50-80%) makes the stamp more dissuasive. The text size adapts automatically to each page width.