Add Watermark to PDF Online Free
Add custom vector text stamps or transparent PNG logo watermarks across all pages or custom page ranges. Full control over opacity, rotation, font style, and precise positioning with zero server uploads.
Drop your PDF here to add watermark
or click to browse a PDF document from your device
100% Private & Offline
Zero server uploads. Your confidential files never leave browser RAM.
Vector-Sharp Quality
Preserves original vector text and tables without rasterization or blurry pixels.
Exact & Lossless
Watermarks are stripped cleanly while leaving non-watermarked content byte-identical.
Engineered with Zero Compromise
How Compixor.Ai redefines privacy, vector precision, and speed for PDF watermarking.
100% Client-Side
Stamps and watermarks are injected directly inside browser RAM. Zero files or bytes are sent to remote servers.
Instant Execution
No server queues, bandwidth throttling, or upload waiting times. Transformations happen in milliseconds.
Client-Side Privacy
Zero telemetry on document contents. Complete client-side confidentiality for contracts and IDs.
Cross-Platform
Runs seamlessly in Chrome, Edge, Firefox, Safari, and mobile browsers with zero software installation.
Add Watermark to PDF Online Free — Safe, Fast & 100% Client-Side
Protect your intellectual property and add watermark to PDF online free in seconds. Compixor AI is an in-browser PDF watermark maker that lets you stamp custom text or add logo to PDF documents with complete layout control. Stamp a confidential watermark PDF, apply copyright notices, or brand draft proposals across all pages or custom page ranges. You can watermark PDF without software installation: free, no signup, no upload, works in your browser with real-time visual positioning, opacity sliders, and font rotation. Safeguard sensitive financial statements, legal contracts, and client reports with zero server exposure.
How to Use Add PDF Watermark Online
Get professional results in under a few seconds with four simple steps.
Select PDF File
Choose the document you want to brand or protect from unauthorized distribution.
Choose Watermark Type
Select either customizable text (e.g., CONFIDENTIAL, DRAFT) or upload a logo image (PNG/JPG).
Adjust Style & Position
Customize font size, rotation angle, opacity, color, and select target pages.
Apply & Download
Stamping is rendered directly in browser memory for instant download.
Why Privacy-First Matters
Your personal photos and sensitive documents deserve 100% confidentiality.
Custom Text & Logo Watermarks
Choose diagonal text stamps or upload transparent PNG company logos with pixel-perfect placement.
Precise Opacity & Angle Control
Adjust transparency from 5% to 100% and rotate watermarks from -90° to +90° to match your brand.
Zero Server Transmission
Client-side stamping ensures client contracts and financial records remain 100% confidential.
Frequently Asked Questions
Common questions about Add PDF Watermark and client-side processing