Watermark Lab
A lightweight Windows desktop tool for applying professional, tiled, diagonal watermarks to PowerPoint, Word, PDF and video files.
Watermark Lab lets you stamp any PowerPoint, Word or video file with a customisable diagonal text watermark in seconds. It runs entirely on your Windows machine — no cloud, no subscription, no data leaves your device.
PowerPoint and Word files are watermarked natively — the result is a real, editable document, not a flattened image. A true-render live preview shows the genuine watermarked output as you type and adjust settings. Video files are processed with ffmpeg, which the app downloads automatically on first use. The app ships as a self-contained portable folder — unzip and run, no installer needed.
Splash your documents and videos with sleek, diagonal watermarks in seconds using this lightweight Windows tool that keeps your originals intact and lets you preview every stylish move before saving. Perfect for making your mark professionally without fuss or installs!
Key features:
- 🎨 Customize watermark text, color, and transparency
- 👀 Live preview with zoom for pixel-perfect placement
- 📂 Batch watermark entire folders with a simple drag & drop
- 🔒 Works offline with no installs or subscriptions needed
This summary was generated by GitHub Copilot based on the project README.