Stamp customized text watermarks with full angle, color, and opacity control.
Adding a watermark to a PDF overlays text — like DRAFT, CONFIDENTIAL, SAMPLE, or your company name — across every page. Watermarking is a quick way to brand internal documents, protect intellectual property, or visually indicate a document's status before wider distribution. PDFly gives you full control over the text content, position (diagonal, header, or center), font size, color, and opacity. Everything runs in your browser.
Upload your PDF, enter your watermark text, customize the appearance using the visual controls, preview the result on a sample page, and download the watermarked file. The watermark is applied uniformly to every page in sequence. You can adjust opacity from very subtle (10–15%) to very bold (50%+), depending on how prominent you want the watermark to be relative to the underlying content.
Watermarking is useful for marking documents as drafts during review cycles, adding copyright notices to published works, or branding internal training materials before circulation. If you need to remove an existing watermark from a PDF, that requires different processing tools. For password-protecting a watermarked document, use the PDF Protect tool afterward. Watermarks are visual overlays only — they don't alter the underlying text, images, or structure of the document in any permanent way.
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