Watermark PDF
Stamp a custom text watermark across every page of a PDF with control over font, size, color, opacity, and rotation. Ideal for marking documents as drafts, confidential, or branded. Runs locally on your SnapOtter instance so sensitive documents stay on your network.
Features
- Customizable watermark text, font, and size
- Adjustable opacity and color for subtle or bold marks
- Configurable rotation angle and position on each page
- Applied consistently across all pages in the document
- Non-destructive overlay preserving original content
What you can do
- Marking contract drafts as DRAFT before internal review
- Adding CONFIDENTIAL stamps to sensitive financial reports
- Branding proposal PDFs with your company name
- Labeling preview copies sent to clients for approval
Self-hosted. Your files never leave your network.
SnapOtter runs entirely on your own infrastructure. Files processed with Watermark PDF are never uploaded to third-party servers. Deploy a single Docker container and process files with full privacy, no watermarks, and no usage limits. Open source under AGPL-3.0.
Frequently asked questions
- Can I control how visible the watermark is?
- Yes, you can adjust opacity, color, size, and rotation to make the watermark as subtle or prominent as needed. Everything is processed locally on your server.
- Does the watermark alter the original PDF content?
- No, the watermark is applied as an overlay layer on each page. Your original text, images, and formatting remain untouched, and all processing stays on your own infrastructure.
- Can I watermark confidential documents safely?
- Absolutely. SnapOtter processes files entirely on your self-hosted instance, so sensitive documents are never uploaded to external servers or cloud services.
Ready to try Watermark PDF?
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