Add watermark
Stamp custom text across every page. Runs in your browser.
Select a PDF to watermark
Stamps all pages in memory · Drop multiple files for Batch Mode
Processed locally in your browser. Never uploaded.
Stamp Copyright, Confidentiality, and Status Markers on PDFs
Vector text stamping with precision alpha-channel transparency
Protecting unreleased manuscripts, legal discovery documents, financial models, and client proposals requires clear visual indicators like 'CONFIDENTIAL', 'SAMPLE', or 'DO NOT COPY'. Uploading these sensitive drafts to conventional web tools exposes them to cloud retention vulnerabilities and potential corporate espionage.
Modifyle's client-side watermark engine embeds custom vector text across every page of your document directly in browser memory. By calculating exact page viewport dimensions and applying mathematical 45-degree rotational transformations, the watermark is positioned centrally with balanced visual impact.
Applying permanent watermarks is an essential security measure when distributing preliminary proofs, legal filings, or internal training manuals. Modifyle stamps scalable vector typography directly into the document's content streams rather than re-encoding pages as heavy bitmaps. This keeps file sizes lightweight, prevents text blurring on high-DPI displays, and allows you to enforce confidentiality policies before sending documents out for external review.
You have fine-grained control over font sizing, opacity, and brand color palettes, creating clean, professional-looking protection without compromising readability.
What Can You Use This Tool For?
Real-world problems solved and intended workflows for this tool.
Confidentiality & Non-Disclosure Markings
Stamp 'CONFIDENTIAL', 'DO NOT COPY', or 'RESTRICTED' diagonally across sensitive pitch decks, trade secrets, and internal audit reports.
Unpaid Client Draft Protection
Freelance designers, copywriters, and consultants stamp large semi-transparent 'PREVIEW DRAFT' watermarks across client deliverables before final payment.
Company Brand Stamping & Copyright Notices
Add company logos, website URLs, and copyright strings to white papers, ebooks, and marketing case studies.
Court Document & Evidence Bating Stamps
Apply sequential exhibit tags, deposition markers, or filing case numbers across legal discovery disclosures.
How It Works in 3 Simple Steps
Upload PDF
Select the PDF file you wish to protect with a text watermark.
Customize Text & Style
Type your text (e.g. CONFIDENTIAL) and adjust font size, opacity slider, and color.
Stamp & Download
Click Apply Watermark to render the overlay across all pages and download the result instantly.
- Watermarks are embedded into the PDF display layers. For high-security documents, combine watermarking with password protection (/tools/pdf/protect) to prevent recipients from removing layers in desktop vector editors.
Why choose Modifyle PDF Watermark Tool?
Launch PDF, image, and QR tools in 1 click right from your home screen or desktop dock. 100% private, client-side, with full offline capability without internet.