Video Watermark Online
The easiest way to watermark videos online without downloading software. Everything runs in your browser—fast, private, and completely free.
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Why Use an Online Watermark Tool?
Traditional video editors require downloads, installations, and often subscriptions. Online watermarking tools skip all that—just open your browser and start working. Our tool takes this a step further by processing everything locally in your browser.
No Download
Works in your browser
No Upload
Files stay on your device
Instant
No waiting for cloud processing
How Online Watermarking Works
LogoOnVideo uses WebAssembly technology to run FFmpeg directly in your browser. This means:
- • Your video never leaves your device. Processing happens 100% locally using your computer's resources.
- • No waiting for uploads or downloads. Since there's no data transfer, the only limit is your device's processing speed.
- • Works offline after first load. Once the tool loads, you can even disconnect from the internet and continue working.
How to Watermark Video Online
Upload Video
Drag & drop your MP4, WebM, or MOV file. The file stays on your computer and is never sent to our servers.
Add Watermark
Upload your logo image or enter text. Choose from 6 professional styles including static placement and animated effects.
Export Instantly
Download your watermarked video. The output is a high-quality MP4 ready for any platform or device.
Browser & Device Compatibility
Our online watermark tool works on any modern device with a compatible browser:
Chrome
✓ Recommended
Firefox
✓ Supported
Safari
✓ Supported
Edge
✓ Supported
Works on Windows, macOS, Linux, iOS, and Android. Desktop devices will process faster than mobile due to more available RAM and processing power.
Frequently Asked Questions
Is this tool safe to use?
Absolutely. We use browser-based processing technology, so your video files never leave your device. There's nothing to intercept, store, or leak. Your content remains 100% private.
Do I need to install any software?
No software installation required. Everything runs directly in your web browser. Just visit this page and start watermarking—no plugins, extensions, or applications needed.
Is there a file size limit?
Since processing happens locally in your browser, the limit depends on your device's available memory. Most computers handle files up to 500MB-1GB easily. For best performance with large files, close other browser tabs.
How long does processing take?
Processing time depends on your video length and device speed. A 30-second clip typically takes 10-30 seconds on modern hardware. Longer videos take proportionally longer.
What output quality should I expect?
Output quality matches your input. We don't downgrade resolution or add compression artifacts. The exported MP4 maintains the same quality as your original file.
Can I use this on my phone?
Yes, the tool works on mobile browsers. However, phones have less RAM and processing power than computers, so you may experience slower processing or limitations with larger files.
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