Watermark PDF
Add a diagonal text watermark (e.g. CONFIDENTIAL, DRAFT) to every page of your PDF. Customise text, opacity and colour.
About the Watermark PDF
A PDF watermarking tool stamps custom text (such as "CONFIDENTIAL", "DRAFT", "COPY", or company names) or graphic logos across pages of a PDF document. Watermarks establish document security, assert intellectual property copyright, and prevent unauthorized distribution.
You can customize watermark text, font size, color, rotation angle (typically 45° diagonal across the page center), positioning (header, footer, centered), and opacity transparency. Keeping opacity between 15% and 25% ensures the watermark remains clearly visible without obstructing underlying document text.
Unlike basic annotations that can be clicked and deleted in simple viewers, this tool stamps the watermark directly into the PDF content stream, ensuring it prints reliably and remains visible across all PDF reader software.
Stamping a semi-transparent gray "DRAFT - DO NOT SIGN" watermark at a 45-degree angle across every page of an unapproved legal agreement before circulating it for stakeholder review.
Tips for best results
- Use diagonal watermarks centered across the page for maximum protection against unauthorized document copying or screenshotting.
- Keep watermark opacity light (15% to 20%) so fine print and critical numeric figures remain legible.
- For official business documents, consider watermarking with recipient-specific identifiers (e.g. "Confidential - Copy for Jane Doe") to deter leaks.
How to use the Watermark PDF
Why use Toolseza for Watermark PDF?
Use this tool as often as you need with no paywalls, premium tiers, or hidden daily calculation quotas.
All calculations and file manipulations run inside your web browser. Your inputs are never sent to a cloud server.
Results update in real-time as you type or adjust settings, with instant one-click copy and export capabilities.
Works natively on smartphones, tablets, laptops, and desktop computers with zero installation or account creation.
Editorial Standards & Verification: All formulas, algorithms, and conversion factors implemented on Toolseza adhere to openly documented international standards (ISO, NIST, BIPM, W3C). Results are verified against benchmark reference datasets before publication.
Frequently Asked Questions
Is Watermark PDF free to use?
Yes — Watermark PDF is completely free, unlimited, and requires no sign-up.
Can I add a transparent watermark?
Yes — watermark opacity is adjustable. Set a lower opacity for a subtle background watermark that does not obscure the document content.
Will my PDF's formatting stay intact?
Yes — layout, fonts and formatting are preserved in the output file.
Does it work on mobile and tablet?
Yes — Watermark PDF works on any modern browser, including mobile and tablet, no app required.