How VideoConvert Works
Understanding the technology behind our privacy-first, browser-based video converter
The Conversion Process
Upload Video
Drag and drop or browse to select your video file. The file stays on your device - no uploads to servers.
Choose Format
Select your desired output format (MP4, WebM, GIF) and quality settings.
Convert
Watch the real-time progress as your video converts entirely in your browser using WebAssembly.
Download
Download your converted video instantly. Original file is cleared from memory for privacy.
Technology Behind VideoConvert
FFmpeg.wasm - WebAssembly Video Processing
VideoConvert uses FFmpeg.wasm, a complete port of the industry-standard FFmpeg video processing library compiled to WebAssembly. This enables native-speed video conversion directly in your browser without any server-side processing.
What is WebAssembly?
WebAssembly (Wasm) is a binary instruction format that runs at near-native speed in modern browsers. It allows complex applications like video encoders to run efficiently in web browsers, enabling true client-side video processing.
Web Workers - Non-Blocking Processing
Video conversion runs in a Web Worker (background thread), keeping the UI responsive. You can see real-time progress updates, cancel conversions, and navigate the interface while your video processes.
IndexedDB - Local History Storage
Your conversion history is stored locally in your browser using IndexedDB. We store metadata like file names, formats, and timestamps - never the actual video files. You can clear this history anytime with one click.
Privacy & Security
Your Videos Never Leave Your Device
Unlike traditional online converters, VideoConvert processes everything locally in your browser. There are no file uploads, no server-side processing, and no data collection. Here's what makes us different:
Zero Server Uploads
Your video files stay in your browser's memory during conversion. Nothing is sent to our servers or any third party.
No Data Collection
We don't use analytics, tracking pixels, or any data collection tools. We genuinely have no idea what videos you convert.
Works Offline
Once FFmpeg.wasm is cached, you can convert videos even without an internet connection. True offline capability.
Memory Cleared
After conversion completes, the original video is cleared from browser memory. Nothing persists beyond the download.
Browser Compatibility
VideoConvert works best on modern browsers that support WebAssembly and Web Workers. Here's what you need:
Google Chrome
v57+ (recommended)
Microsoft Edge
v79+ (recommended)
Mozilla Firefox
v52+ (recommended)
Safari
v11+ (iOS & macOS)
Performance Note: Desktop browsers recommended for large files (>1GB). Mobile browsers work but may be slower and have memory limitations.
Frequently Asked Questions
Why is the first conversion slow?
The first conversion requires downloading FFmpeg.wasm (~30MB) from CDN. This only happens once - the library is cached by your browser. Subsequent conversions start immediately and are much faster.
What's the maximum file size?
There's no artificial file size limit. However, browser memory is finite - very large files (>2GB) may cause performance issues or crashes depending on your device's available RAM. For best results, use desktop browsers with adequate memory.
Can I use this offline?
Yes! Once FFmpeg.wasm is cached (after your first conversion), VideoConvert works completely offline. You can convert videos anywhere, anytime, even without internet connection.
Do you store my conversion history?
Your conversion history is stored locally in your browser's IndexedDB - not on our servers. We only store metadata (file names, formats, timestamps), never actual video content. You can clear this history anytime with the "Clear History" button.
How do you make money if it's free?
VideoConvert is completely free with no ads or upsells. Our hosting costs are minimal since all processing happens in your browser. We believe in providing value without compromising user privacy or experience.