Add text or image watermarks with tiling, page selection & layer control
WhiskFile Watermark PDF is a free online tool to add text or image watermarks with tiling, page selection & layer control. Files are processed entirely in your browser — nothing is uploaded to any server.
Quick Answer
Add text or image watermarks with tiling, page selection & layer control. WhiskFile's Watermark PDF is free, works in your browser, and requires no account. Your files never leave your device — all processing happens locally.
Upload your PDF
Select or drag and drop your PDF file. It loads instantly in your browser — nothing is uploaded to any server.
Choose watermark type
Select Text or Image mode. For text, type your watermark or pick a preset (CONFIDENTIAL, DRAFT, COPY, DO NOT COPY, VOID, SAMPLE, © year). For image, upload a PNG or JPG logo.
Select a pattern
Choose Single (centered placement), Diagonal (staggered rows), or Grid (aligned rows). For diagonal and grid, adjust horizontal and vertical tile spacing with sliders.
Pick a color
Click one of 10 color presets (red, blue, green, gray, black, white, orange, purple, teal, pink) or enter a custom hex color for full control.
Customize appearance
Adjust font, size, opacity (3-100%), and rotation (-90 to +90°). For image watermarks, set scale and opacity. Choose above or below content layer.
Set pages and preview
Apply to all, odd, even, or custom page ranges. Use the live preview with 25%-400% zoom to verify every page before downloading.
Max file size: 50 MB (free) · 500 MB (paid). Processing time: ~8s on average. Upload one file at a time.
Watermark PDF runs entirely in your browser — no software to install. Works on any device with a modern browser.
Windows & Mac
Chrome, Firefox, Edge, Safari
iPhone & Android
Safari, Chrome mobile
iPad & Tablets
Full touch support
Unlike server-based tools that upload your documents, WhiskFile processes everything locally in your browser. Your files never leave your device — not even temporarily.
No upload required
Files are processed in your browser — nothing is sent to any server
100% private
No server storage, no data collection, no third-party access
Works offline
Once loaded, works without an internet connection
“Password-protecting sensitive documents before sharing gives me peace of mind. Simple and reliable.”
Robert Liu
Compliance Officer
“Redacting confidential info from legal documents is critical. WhiskFile makes it foolproof.”
Nina Patel
Attorney
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Client-side processing
This tool now runs entirely in your browser — files never leave your device.
Result preview & sharing
Preview your processed file before downloading, and share results via a secure link.
Three modes: Single places one watermark at a chosen position, Diagonal repeats the watermark in staggered offset rows for a classic security pattern, and Grid repeats it in aligned rows and columns for uniform full-page coverage.
Yes. For Diagonal and Grid patterns, separate horizontal and vertical spacing sliders let you control how far apart the watermarks are — from tight (10%) for dense security coverage to wide (80%) for subtle branding.
Text watermarks embedded in PDFs are difficult but not impossible to remove with advanced tools. For highest security, use a dense diagonal or grid pattern and combine with password protection.
Yes. Set the opacity to 20-30% so the watermark is visible but doesn't obscure the document content below it.
Yes. Choose to apply to all pages, odd pages, even pages, or a custom page range (e.g. 1-3, 5, 8).
Yes. Switch to Image mode and upload a PNG or JPG file. PNG files with transparent backgrounds work best — the transparency is preserved so your logo blends naturally over the PDF content.
No. WhiskFile watermarks PDFs entirely in your browser using pdf-lib. Your file never leaves your device — nothing is uploaded. This makes it completely private and GDPR-friendly.
Yes. Use the layer control to choose 'Below content'. The watermark appears behind the text and images, ideal for subtle branding or background patterns.
Three professional font families: Helvetica (sans-serif), Times Roman (serif), and Courier (monospace). All render crisply at any size from 8pt to 200pt.
Click the © preset button to insert '© 2026' (current year) as your watermark text. You can combine it with diagonal or grid patterns for full-page copyright protection.
No. WhiskFile has no file size limits, no task caps, and no page limits. Competitors like Soda PDF (3 MB, 2 files/day) and Sejda (50 MB, 50 pages, 3 tasks/hour) impose strict restrictions.
Yes. WhiskFile watermarks PDFs directly in your browser — no software to install. The watermarked PDF is compatible with all standard PDF viewers.
Yes. The live preview shows your watermark exactly as it will appear on the page, with zoom controls from 25% to 400% and page navigation to check any page.
10 one-click color swatches: red, blue, green, gray, black, white, orange, purple, teal, and pink. You can also enter any custom hex color code for precise brand matching.
Yes. Watermark PDF on WhiskFile is completely free with no account required. Free users get 7 tasks per day with files up to 50 MB. There are no watermarks on any plan. Pro plans ($4.99/month) unlock unlimited tasks, 500 MB files, batch processing, and API access.
Yes. Watermark PDF runs entirely in your browser using WebAssembly. Your files are never uploaded to any server — they stay on your device throughout the entire process. No data is transmitted, stored, or accessible to WhiskFile or any third party.
Yes. Watermark PDF works on any device with a modern browser — iPhone, Android, iPad, tablets, Chromebooks, and desktop computers. No app download required. The interface adapts to your screen size automatically.
Watermark PDF accepts PDF files as input and produces PDF output. The maximum file size is 50 MB on the free plan (500 MB for Pro users). There are no page count limits.
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