PDF Watermark Stamper
Stamp text watermarks (DRAFT, CONFIDENTIAL, custom) onto PDF pages with custom opacity, size, rotation, color, and position. Free and 100% in-browser — no upload.
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What is PDF Watermark Stamper?
PDF Watermark Stamper is a free in-browser tool that stamps text watermarks — DRAFT, CONFIDENTIAL, FINAL, SAMPLE, or your own label — onto PDF pages with full control over position, opacity, size, rotation, and color. Everything is processed locally with pdf-lib, so confidential documents never leave your device.
Key Benefits
- Stamp drafts and internal documents before sharing to deter unauthorized reuse
- 100% private: the PDF is processed in your browser and never uploaded
- Professional results with precise opacity, rotation, and position control
- Long text auto-shrinks to fit the page width — no clipped watermarks
- Free and unlimited with no sign-up and no page-count restrictions
Common Use Cases
- •Marking contract drafts as DRAFT before circulating for review
- •Stamping CONFIDENTIAL on HR, legal, or financial documents
- •Labelling SAMPLE across product mockups and catalog pages
- •Adding a review or approval mark to only the first page of a report
- •Branding handouts with a subtle diagonal team or project name
How to Watermark a PDF
- Upload your PDF: Drag and drop your PDF into the drop zone — or click to browse. The file opens locally in your browser and is never uploaded.
- Choose the stamp text: Type a custom label or click a preset: DRAFT, CONFIDENTIAL, FINAL, or SAMPLE. Standard PDF fonts cover Latin letters, digits, and basic punctuation.
- Adjust the style: Pick one of 9 positions, then set opacity, font size, rotation angle, and color. The live preview shows roughly where the mark will land.
- Stamp and download: Choose all pages or first page only, click the stamp button, and the watermarked PDF downloads instantly.
Key Features
- Diagonal or horizontal text stamps with angle control from -90° to 90°
- 9 anchor positions from corners to center with smart edge padding
- Adjustable opacity 10-100% so body text stays readable under the mark
- Auto-shrink keeps long stamps inside the page width — never clipped
- Apply to every page or first page only, with a live preview