Text Watermark

How to Use

1. Click the area above to select a file, or drag and drop a file onto the page
2. Adjust parameters in the settings area
3. Click the process button and download the result when ready

Frequently Asked Questions

How It Works

The Text Watermark tool uses FFmpeg WebAssembly with the drawtext filter to render text overlays onto video frames. The filter uses FreeType font rendering to draw anti-aliased text at any position on the video canvas.

The drawtext filter accepts parameters including: fontfile (embedded font), fontsize (pixel size), fontcolor (hex color with alpha), x/y (position coordinates using W/H as video width/height variables), and alpha (opacity 0.0-1.0). Position presets use calculated coordinates: top-left = (10, 10), bottom-right = (W-tw-10, H-th-10), where tw/th are text dimensions.

Each video frame is decoded, the text is rendered onto the frame's pixel buffer using the FreeType library compiled to WebAssembly, and the modified frame is re-encoded. The text is drawn with sub-pixel rendering for smooth, readable text at any font size. Alpha transparency is blended using standard over-compositing.

Tips & Best Practices

• Semi-transparent watermarks at 30-50% opacity protect your content without being too distracting to viewers.
• Corner placement (bottom-right preferred) is standard for professional video watermarks and doesn't obstruct main content.
• High contrast text: Use white text with black outline (or vice versa) to ensure readability on any background.
• Font size matters: Keep watermarks small (12-16px) for subtle branding, or large (24px+) for anti-theft purposes.
• Consistent branding: Use the same font, color, and position across all videos for a professional, recognizable brand identity.
• For copyright protection: Place a larger, semi-transparent watermark in the center to deter unauthorized use.

Use Cases

Stock footage creators adding branded watermarks to preview videos to protect their intellectual property before purchase.

Corporate training departments adding CONFIDENTIAL watermarks to internal training videos. YouTubers branding their content with channel names to prevent content theft. Event videographers watermarking preview clips to prevent unauthorized use before final delivery. Educational platforms adding institution logos to course videos for brand recognition. Freelance videographers watermarking client review copies before receiving final payment.

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