Add Watermark to PDF
Add custom text or image watermarks with precision opacity, rotation, and 3x3 anchor positioning.
Select PDF to add watermark
or drag and drop PDF here
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Customize text watermark opacity, angle & styling
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How to Add Watermark to PDF Online in 3 Steps
Protect your intellectual property, identify draft documents, and reinforce corporate branding by adding high-definition text or graphic watermarks to your PDF files. Reshape stamps custom watermarks directly in device memory without compromising document fidelity.
Select PDF Document
Drop your target PDF into the upload container or select it via your system file picker. The file streams into isolated browser memory ready for immediate visual watermark composition.
Customize Text, Opacity & Rotation
Type your custom watermark label (such as "CONFIDENTIAL", "DRAFT", or your company name), adjust rotation angles (-45°, 0°, 45°), tune opacity levels, and pick font size and color.
Stamp & Save Watermarked PDF
Apply the watermark overlay across all pages. Our client-side engine renders vector-crisp watermark elements and provides an immediate download link with zero watermarking fees.
Why Use Reshape's Client-Side PDF Engine?
Most online watermarking utilities transmit your proprietary documents to remote cloud servers, exposing sensitive business plans or draft contracts to third-party interception. Reshape executes all watermark rendering locally in your private session.
100% Local Confidentiality
Your confidential proposals, unreleased manuscripts, and financial drafts remain entirely on your local device with zero transmission across external networks.
High-Performance Document Engine
Watermark typography and vector graphics are composited directly into the PDF content stream using PDF-Lib, maintaining razor-sharp rendering on all zoom levels.
Zero Server Storage & GDPR
Zero server storage means zero risk of data leakage. All temporary canvas buffers and object streams are instantly purged when you close or reload the browser tab.
Key Technical Specifications
Our client-side watermark stamper provides complete control over rotation angles, transparency blending, and page layer positioning.
Maintains ISO compliance while injecting alpha-blended vector text layers across page content streams.
Batch watermarks multi-page documents, contracts, and presentations in seconds without browser freeze.
Optimized for modern desktop and mobile browsers including Chromium, WebKit, and Gecko runtimes.
Runs locally inside your browser sandbox with zero tracking cookies, zero analytics logs, and zero cloud uploads.
Frequently Asked Questions
Find answers to common questions about stamping confidential watermarks, adjusting transparency, and positioning marks on PDF pages.
Can I adjust the transparency and angle of the watermark? expand_more
Yes. You have granular control over watermark opacity ranging from subtle semi-transparent tints (e.g., 15% to 30% for readability behind body copy) to bold, prominent overlays, along with diagonal (-45° or 45°) and horizontal orientation angles.
Does the watermark appear in front of or behind existing document text? expand_more
By default, the watermark is layered over page contents with semi-transparency so that underlying paragraphs, tables, and charts remain clearly legible while still deterring unauthorized duplication and distribution.
Can I watermark only specific pages rather than the entire document? expand_more
Yes. You can apply your watermark across all pages uniformly or target specific page ranges such as body chapters while leaving cover sheets and executive summaries clean.
Does adding a watermark increase the file size significantly? expand_more
No. Because the watermark is inserted as lightweight vector text streams referencing standardized font metrics, the resulting increase in file size is negligible (typically just a few kilobytes).
Are my proprietary documents stored on your servers? expand_more
Never. Reshape performs all watermark transformations entirely client-side using secure client technology on your device. No files, logs, or metadata are ever transmitted or saved on remote servers.