Universal Video Converter
Convert securely between formats without uploading your files.
Unlimited size. Zero data usage. Powered by WebAssembly.
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Local Privacy
Your sensitive footage never touches a server. Perfect for corporate, legal, or personal videos that must remain private.
No Upload Wait
Skip the upload/download bottleneck. Processing happens instantly on your CPU, saving gigabytes of bandwidth.
Universal Compatibility
Our robust engine supports standard codecs (H.264, VP9) ensuring your videos play on every device.
Understanding Video Containers
A video file like "video.mp4" is actually a container that holds multiple streams (video, audio, metadata). The problem arises when a container holds a stream your device can't decode.
- 1MP4 (MPEG-4 Part 14)The gold standard. Supported by 99% of browsers and devices. Best for sharing.
- 2WebMOpen web standard optimized for HTML5. Great compression but limited Apple support.
- 3MOV / AVILegacy or editing formats. Often huge file sizes and poor web compatibility.
Web Compatibility
Simple 3-Step Process
Load Engine
We download a small ~20MB conversion engine to your browser cache once.
Select Video
Drag and drop your file. We auto-detect the optimal settings.
Instant Save
The conversion starts immediately. Download the MP4 when done.
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Common Questions
Is it completely free?
Yes. Use it as much as you want. We support the site through ads, so we don't need to charge you.
Does it support 4K?
Yes, but 4K conversion is very CPU intensive. For 4K files, we recommend using a desktop PC rather than a mobile phone for best speed.
Can I convert MKV files?
Yes! MKV is a great container but often fails on TVs or Phones. Converting to MP4 usually fixes playback issues.
Why do I need to 'Load' first?
Because we run offline! We need to fetch the processing core first. After the first load, it stays cached and works instantly.
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