PDF Watermark
Add a text watermark to every PDF page.
Draft reports, internal memos, and pre-release documents often need a visible label before they leave your team - Confidential, Draft, Sample, or Do Not Distribute. Utilitoo's PDF Watermark tool stamps custom text across every page of your document at a diagonal angle, entirely in your browser.
Legal teams marking working copies, product managers sharing preview builds, and consultants labeling sample deliverables all need quick watermarking without expensive desktop software or risky cloud uploads. Enter your text, adjust opacity, upload your PDF, and download the watermarked result in seconds.
The watermark is applied as semi-transparent text on each page using pdf-lib. Default opacity is 25% so content remains readable beneath the stamp. Lower opacity for subtle marks, or increase it for stronger visual deterrence on sensitive drafts.
All processing happens locally on Utilitoo. Your PDF is never uploaded, stored, or shared with third parties. Free, instant, and private - built for professionals who need to label documents before sharing them internally or with clients.
PDF Watermark keeps PDF work on your device - useful for contracts, invoices, and personal records that should not be uploaded to unknown servers. Processing time scales with file size and page count; wait for the progress indicator to finish before downloading results.
Common use cases
- Add a text watermark to every PDF page - a common daily workflow on Utilitoo.
- Preparing PDFs for printing, archiving, or upload to portals with size limits.
- Extracting or reformatting PDF content without paid desktop software.
- Handling sensitive pdf watermark tasks locally when files must not leave your device.
- Cross-checking PDF Watermark output against a colleague's result during pair debugging or code review.
Tips & common mistakes
PDF Watermark processes PDFs locally in your browser on Utilitoo - your documents are not uploaded to our servers. Large files may take longer on older devices; close other heavy tabs if the browser feels slow. Always keep a backup of the original PDF before merging, splitting, or rotating pages. If the output PDF looks wrong, confirm the source file is not password-protected or corrupted. PDF Watermark works on standard PDFs; scanned image-only PDFs may need OCR elsewhere before text extraction can help.
All PDF processing runs locally in your browser. Files are never uploaded to a server.
Maximum 10.0 MB and 100 pages per file (free tier).
How to use
- Upload a PDF.
- Enter watermark text and opacity.
- Download the watermarked PDF.
Frequently Asked Questions
How do I add a watermark to a PDF online for free?▼
Upload your PDF to Utilitoo, enter watermark text such as CONFIDENTIAL, set opacity, and click Apply watermark to download the stamped file.
Can I customize the watermark text?▼
Yes. Enter any text you want. Common choices include CONFIDENTIAL, DRAFT, SAMPLE, and DO NOT DISTRIBUTE.
Does the watermark appear on every page?▼
Yes. Utilitoo applies the watermark text to all pages in the document at a diagonal angle.
Can I adjust how visible the watermark is?▼
Yes. Set opacity between 0 and 1. Lower values such as 0.15 are subtle; higher values such as 0.5 are more prominent.
Are my PDFs uploaded when adding a watermark?▼
No. Watermarking runs entirely in your browser on Utilitoo. Your document never leaves your device.
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