A watermark protects your work and your privacy. Whether you're a freelancer marking a proposal as DRAFT, a student writing "Submitted to XYZ only" across an ID copy, or a business stamping CONFIDENTIAL on a contract, a clear diagonal watermark tells everyone how a document should be used. GoPDFGo's Watermark PDF tool stamps your chosen text across every page — diagonally and semi-transparent so it's visible without hiding the content. It runs entirely in your browser, so your sensitive documents never touch a server. Add your watermark and download in seconds, with no signup and no watermark from us.
Why Watermark Your PDFs?
Custom Text Stamp
Type anything — CONFIDENTIAL, DRAFT, your name, a website, or 'For KYC use only'. The text is applied across every page in one go.
Adjustable Opacity
Control how strong the watermark looks. Keep it light so the document stays readable, or make it bold to clearly mark ownership and intent.
Secure & Local
Stamping a confidential agreement or an ID copy? It's safe. The watermark is applied on your own device — your file is never uploaded anywhere.
Best Times to Add a Watermark
Protecting ID Copies: Write 'Submitted to [Company] only' across a copy of your Aadhaar, PAN, or license so it can't be misused elsewhere.
Marking Drafts: Freelancers and teams can stamp DRAFT or SAMPLE on proposals and designs before they're finalized.
Confidential Documents: Clearly mark contracts, reports, and financial statements as CONFIDENTIAL before sharing.
Branding: Add your name or website across a portfolio or quotation to reinforce ownership.
How to Watermark a PDF
Upload PDF: Drop your document in — it loads instantly and privately.
Enter Watermark Text: Type the text you want stamped on every page.
Adjust Opacity: Slide to make the watermark lighter or darker to taste.
Apply & Download: Click to stamp every page and download your watermarked PDF.
Watermark Tool FAQs
Will the watermark cover my text?
No. The watermark is placed diagonally and semi-transparent, so your original content stays fully readable underneath it. You can also lower the opacity.
Is the watermark added to every page?
Yes. Your chosen text is stamped consistently across all pages of the document in a single click.
Can the watermark be removed later?
The watermark is baked into the page content, so it is permanent. Keep a copy of your original file if you'll need an un-watermarked version.
Is it safe for confidential files?
Yes. Watermarking happens entirely in your browser. Your file is never uploaded, so even sensitive documents stay private.