Video Watermark Editor
Add watermark to videos online directly in your browser. Upload MP4/WebM, apply logo or text watermark, and export quickly without server uploads.
1Upload Video
2Add Watermark
3Position & Settings
4Export
Video will be encoded at high quality with the watermark overlay. This may take a moment depending on video length and device speed.
Upload a video above to get started.
Why Hardcoding Copyright is Mandatory
Many modern video platforms offer 'stickers' or text overlays when you upload, but these are merely dynamic metadata layers. If someone downloads the raw `.mp4` file from the platform using a third-party scraper, those metadata stickers are often completely omitted, leaving your raw video totally unprotected.
To genuinely secure a video asset, the watermark must be physically 'hardcoded' or 'burned' into the actual pixel data of the video stream. This means re-encoding the H.264 or VP9 video track so that the pixels of your logo permanently replace the original pixels of the video in that specific quadrant. A hardcoded watermark is fundamentally impossible to reliably remove without heavily blurring or severely cropping the entire video frame, making the stolen asset useless to professional thieves.
Common Video Protection Scenarios
Social Media Virality
Permanently burning your exact '@username' directly into a short-form comedy skit before uploading it to TikTok to ensure you gain followers even if the video is illegally downloaded and reposted on Twitter.
Corporate Webinars
Superimposing a semi-transparent corporate logo in the top-right corner of a 45-minute recorded Zoom presentation before uploading it to YouTube for public distribution.
Stock Footage Sales
Videographers aggressively stamping a large, low-opacity 'PREVIEW ONLY' text grid across their 4K drone footage when sending approval drafts to advertising clients.
Esports & Gaming Clips
Burning a Twitch or YouTube channel URL into high-octane gaming highlights to drive traffic back to a live-streaming channel when clips are shared on Reddit.
How to Add a Watermark to Video
- Select your local raw video file (MP4, WebM, MOV) and drop it into the video interface.
- **For Text Overlays:** Type your desired copyright phrase. Customize the exact font size, font color, and adjust the opacity slider to make the text semi-transparent.
- **For Image Overlays:** Upload your brand's transparent PNG logo. Scale the logo appropriately to ensure it isn't obstructing the primary subject of the video.
- Click and drag the watermark exactly where you want it on the live preview canvas. (The bottom-right corner is standard for corporate logos, while center-screen is best for client drafts).
- Click 'Export Video'. The aggressive WebAssembly encoding engine will spin up locally. Do not close the browser tab until the final `.mp4` file automatically downloads.
Strategic Watermark Placement
If you are specifically watermarking a video destined for TikTok or Instagram Reels (9:16 vertical ratio), you must be hyper-aware of the platform's native UI elements. If you burn your watermark into the absolute bottom-right corner of a vertical video, TikTok's native 'Like/Comment/Share' buttons and scrolling caption text will completely cover your watermark, rendering it invisible to viewers. For vertical short-form platforms, always position your watermark horizontally centered, roughly 20% down from the top edge, or 30% up from the bottom edge.
Additionally, aggressively leverage opacity. A solid, 100% opaque logo distracts heavily from the actual video content and annoys viewers. Dialing your watermark's opacity down to 35-50% provides perfect copyright protection while allowing the viewer to subconsciously ignore the branding and enjoy the underlying footage.
The Architecture of FFmpeg WebAssembly
Our platform revolutionizes this by loading `ffmpeg.wasm`—a complete port of the industry-standard FFmpeg audio/video processing suite—directly into your local browser's WebAssembly sandbox. When you execute a render, the JavaScript engine extracts the individual frames from your `.mp4` locally in RAM. It mathematically composites your chosen text or PNG logo onto each individual frame sequentially, and then completely re-compresses the video stream back into a highly optimized H.264 MP4 container. Your massive video files literally never leave your physical hard drive, ensuring military-grade zero-knowledge privacy.