How to Add Watermark to PDF Free Online
Watermarks protect your documents by marking them as CONFIDENTIAL, DRAFT, SAMPLE, or with your company name. They discourage unauthorized copying and make document status clear at a glance. PDFcraft adds custom text watermarks to any PDF for free — no sign up, no software, and your file never leaves your device.
Why add a watermark to a PDF?
Mark documents as confidential
Stamping CONFIDENTIAL on sensitive documents like contracts, proposals, or HR files makes the document's sensitivity clear to anyone who receives it.
Identify draft documents
Adding DRAFT prevents people from treating a work-in-progress document as the final version. Useful for reports, designs, and proposals being reviewed.
Protect intellectual property
Adding your company name or website URL as a watermark on reports, whitepapers, or educational content makes it harder to redistribute without attribution.
Mark samples and previews
If you share document samples with potential clients, a SAMPLE watermark makes clear they are getting a preview, not the full deliverable.
How to add a watermark to a PDF — step by step
Open PDFcraft Watermark tool
Go to PDFcraft and click Watermark PDF. Works in any browser — Chrome, Safari, Firefox, Edge. No installation or sign up needed.
Select your PDF
Click Select File and choose the PDF you want to watermark. Your file is processed locally and never uploaded to any server.
Enter your watermark text
Type the text you want to use as a watermark — CONFIDENTIAL, DRAFT, your company name, or any custom text.
Adjust settings
Customize the opacity, size, and position of the watermark to suit your document. A diagonal centered watermark is the most common and effective style.
Click Add Watermark
PDFcraft applies the watermark to every page of your PDF instantly in your browser.
Download the watermarked PDF
Click Download to save the watermarked PDF to your device. The watermark appears on every page.
Common watermark text examples
- CONFIDENTIAL — for sensitive business documents
- DRAFT — for documents under review
- SAMPLE — for preview documents
- DO NOT DISTRIBUTE — for restricted documents
- FOR INTERNAL USE ONLY — for internal documents
- Your company name or website URL
- Copyright notice — © 2026 Your Company
Tips for effective watermarks
The most effective watermarks are diagonal, centered on the page, and use 20-30% opacity so the underlying text remains clearly readable. Too dark and the watermark obscures the content. Too light and it becomes invisible when printed. A mid-grey diagonal text at medium opacity is the industry standard for professional documents.
💡 Pro tip
For maximum protection on confidential documents, combine a watermark with PDF password protection. Use PDFcraft's Watermark PDF tool first, then add a password afterward.
Frequently asked questions
Can I add a watermark to a PDF for free?
Yes. PDFcraft adds text watermarks to any PDF completely free. No sign up, no limits, no watermarks from PDFcraft itself on your output.
Can I add a logo as a watermark?
PDFcraft currently supports text watermarks. For image watermarks, you would need a more advanced tool like Adobe Acrobat.
Will the watermark appear on every page?
Yes. PDFcraft applies the watermark to every page of your PDF automatically.
Can the watermark be removed?
Text watermarks added by PDFcraft are embedded into the PDF. While technically possible to remove with advanced software, they serve as a strong deterrent and are sufficient for most professional use cases.
Is my file safe when adding a watermark?
Yes. PDFcraft processes your PDF entirely in your browser. The file never leaves your device, making it completely safe for confidential documents.
Can I add a watermark on mobile?
Yes. PDFcraft works on iPhone and Android browsers. Open getpdfcraft.com, tap Watermark PDF, and follow the same steps as on desktop.