PDF Watermark
Add a text watermark — CONFIDENTIAL, DRAFT, COPY, brand name — to every page of a PDF. Adjustable opacity, font size, and position (center diagonal, horizontal, top, bottom).
What powers the PDF Watermark
Text watermark on every page
Opacity slider (5–100%)
Font-size slider (20–120 pt)
4 positions: diagonal center / horizontal / top / bottom
file stays on your device
Why the PDF Watermark is different
Browser-native
The PDF Watermark runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Marking documents CONFIDENTIAL / DRAFT
- Branding deliverables
- Pre-print proofing
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.