Overlay semi-transparent diagonal text across every page of your PDF using single or tiled layouts, custom colors, and live page previews.
When you circulate a contract draft, price quote, architectural drawing, lecture handout, or identity document copy, nothing stops a recipient from forwarding the file or presenting an unapproved draft as a final version. Stamping a clear diagonal watermark across every page immediately communicates the document’s status—such as DRAFT, CONFIDENTIAL, SAMPLE, or COPY—and discourages unauthorized redistribution.
Our Add Watermark to PDF tool gives you full visual control before you export. You can type any custom phrase or company name, or click quick preset chips, then choose between a Single Center layout (one large diagonal stamp in the middle of each page) or a Tiled Repeating Grid (12 diagonal stamps distributed across the entire page so no section can be cropped or screenshotted without the watermark showing). You can also pick Gray, Red, or Corporate Blue ink and choose Light (14%), Standard (24%), or Bold (42%) opacity while checking a live thumbnail preview of page 1.
All watermarking happens locally in your browser without sending your files to an external server. If you are submitting ID card scans for a specific verification and want to stamp "For Visa Application Only" across the page, or marking internal financial drafts, your documents never leave your device. For extra protection against someone editing the watermark layer later, you can pass the finished file through our Flatten PDF tool.
No. Because the watermark is rendered with semi-transparent opacity (such as 14% or 24%), the underlying paragraphs, tables, and numbers remain completely legible.
Single places one large diagonal watermark across the center of each page. Tiled repeats your watermark 12 times in a 3×4 grid across the whole page so nobody can crop out an unmarked section.
After adding your watermark, open the file in our Flatten PDF tool (using the full-page lock mode) or our PDF Copy Protection tool so the watermark becomes permanently fused with the page.
Yes, and because the tool runs 100% locally in your browser, you can safely stamp text like "For Account Verification Only" onto ID scans without uploading them to any server.
Yes. The watermark is automatically stamped consistently across every page of your PDF document in a single pass.