Add custom text watermarks to PDF pages online for free. Type watermark text, choose from 9 font styles, adjust opacity (5–100%), rotation (-180° to 180°), pick from 9 preset positions or drag to place, and apply to all or specific pages. 100% free, no uploads, fully private. Best free online PDF watermark tool.
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PDF only · Max 200.00 MB
200.00 MB
Max file size
Format
100% local
Privacy
~5 seconds
Speed
9 positions
Positions
Free forever
Price
Combine multiple PDF files into a single document online. Merge PDFs in any order, rotate individual pages, and download the combined result — all processed locally in your browser.
Split PDF files into multiple documents online. Extract specific pages by range, split into chunks of N pages each, or export every page as a separate PDF. All processed locally in your browser.
Rearrange, rotate, and delete pages in your PDF files online. Reorder pages by drag-and-drop, rotate individual pages, remove unwanted pages, and download a perfectly organized PDF — all processed locally in your browser.
Crop PDF pages by removing unwanted margins. Drag the crop handles to select the visible area, choose from preset aspect ratios, and apply to all or specific pages — all processed locally in your browser.
Delete unwanted pages from your PDF files online. Select pages to remove from a visual thumbnail grid, keep only the pages you need, and download a clean PDF — all processed locally in your browser.
Rotate individual PDF pages or all pages at once. Clockwise 90°, counter-clockwise 90°, or 180° rotation. Visual thumbnail grid, batch rotate all, reset all — all processed locally in your browser.
Adding a watermark to your PDF documents is essential for protecting intellectual property, branding your work, or marking documents as drafts, confidential, or sample copies. The Add Watermark to PDF tool lets you apply custom text watermarks across every page of your PDF — all directly in your browser with no file uploads to any server.
Simply type your watermark text (e.g., "CONFIDENTIAL", "DRAFT", "SAMPLE", or your company name), choose from 9 preset positions or drag to place it anywhere, adjust the opacity with the slider, set the rotation angle, and pick from 9 font styles. The watermark is rendered at your chosen position with full control over size, color, and which pages receive it. Apply it to all pages or only specific page ranges for targeted protection.
All processing runs entirely in your browser using pdf-lib for professional-grade PDF manipulation. Your files are never uploaded to any server — complete privacy for sensitive documents. The responsive layout adapts from a stacked single-column on phones to a side-by-side controls-and-preview layout on desktops, making it easy to configure and preview your watermark in real time.
Tip: Use a medium opacity (20–40%) for a professional watermark that is visible but does not distract from the content. For draft or sample documents, higher opacity (50–70%) makes the watermark unmistakable. A slight rotation (-30 to -45 degrees) gives the watermark a classic diagonal appearance.
Input: "business-proposal.pdf" (15 pages, 4.2 MB)
Situation: A confidential business proposal that needs to be shared with a reviewer. You want to add a "CONFIDENTIAL" watermark across every page to discourage unauthorized distribution.
Step 1 - Upload: Drop business-proposal.pdf onto the upload area. After loading, all 15 pages appear as thumbnails in the grid.
Step 2 - Configure watermark: Type "CONFIDENTIAL" in the watermark text input. Adjust the opacity slider to 35% — enough to be clearly visible but not distracting from the content.
Step 3 - Process: Click the floating Add Watermark button. A progress spinner appears and completes in approximately 5 seconds.
Output: "business-proposal-watermarked.pdf" — all 15 pages have a diagonal "CONFIDENTIAL" watermark at 35% opacity. The watermark is readable but does not obscure the underlying proposal content. Ready for secure sharing.
Alternative: For a draft document review, use "DRAFT" at 50% opacity. For a sample document, use "SAMPLE — NOT FOR DISTRIBUTION" at 40% opacity to clearly mark the document as a preview copy.
You can use any text up to 100 characters. Common watermarks include "CONFIDENTIAL", "DRAFT", "SAMPLE", "COPYRIGHT", company names, document status labels, or custom messages. You can choose from 9 font styles including Helvetica, Times Roman, and Courier with bold/italic variants.
You can place the watermark at any position on the page. Choose from 9 preset positions (top-left, top-center, top-right, center-left, center, center-right, bottom-left, bottom-center, bottom-right), or click and drag the watermark text on the live preview to position it freely. The watermark supports rotation from -180 to 180 degrees for custom angles.
Yes. Use the opacity slider to adjust from 5% (very subtle) to 100% (fully opaque). The default 30% offers a good balance between visibility and readability. Lower values are better for background watermarks, higher values for clear document marking.
The maximum file upload size is 50 MB. If your file exceeds this limit, you will see a clear error message explaining the constraint. For larger files, consider using our PDF Compressor tool first to reduce the file size.
No. The tool cannot process password-protected or encrypted PDF files. You must remove the password protection using a PDF unlocker tool before adding a watermark.
Absolutely. All processing happens entirely in your browser using client-side JavaScript. Your PDF files are never uploaded to any server. The tool uses pdf-lib and pdf.js running directly in your browser to read, render previews, and add watermarks to your documents. Your data never leaves your device.
Yes, the tool is fully responsive and works on any modern mobile browser. The page thumbnail grid adapts from 2 columns on phones to 6 columns on large screens, and all controls including the text input and opacity slider are touch-friendly.
No. Your original PDF file is never modified. The tool reads the file, applies the watermark, and creates a new PDF with the watermark embedded. You download the new file — your original remains completely untouched on your device.
The tool displays a 5-second processing spinner to provide consistent visual feedback. The actual watermarking process completes quickly — the time depends on the number of pages and the document size.
Once a watermark is applied and the PDF is saved, the watermark text becomes part of the page content. It cannot be easily removed. We recommend keeping a copy of your original unwatermarked PDF for future use.
Yes, the Add Watermark to PDF tool is completely free with no hidden costs, subscriptions, or premium tiers. No watermarks, usage limits, or registration required. You can watermark as many PDFs as you need.
You can choose from 9 font styles: Helvetica, Helvetica Bold, Helvetica Oblique, Times Roman, Times Roman Bold, Times Roman Italic, Courier, Courier Bold, and Courier Oblique. The selected font is embedded directly into the output PDF for consistent rendering across all devices and PDF viewers. The font size can be set manually (8–200 pt) or auto-scaled based on page dimensions.
The watermark is rendered as text content in the PDF, so it can appear in text selection and copying on some viewers. For stronger protection, consider flattening the PDF or using a dedicated PDF protection tool.
Currently, the tool supports single-line watermark text. Multi-line support is not available. We recommend keeping your watermark text concise for best visual results.
