PRIVATE BROWSER PROCESSING
Convert video online without sending it to a server
Open the video you already have, choose the format you actually need, and convert it locally in your browser. No upload queue, no account, and no mystery step after you click Convert.
Video converter
A converter is most useful when it gets out of the way
MP4 is the safest default for everyday sharing. WebM makes sense for web-first delivery, MOV is useful in Apple-heavy workflows, while MKV is flexible for local media. This tool converts the main video stream and first audio stream.
Privacy and limitations
Processing uses FFmpeg WebAssembly locally. The video is not uploaded by this tool. Closing or refreshing the page clears the working file. Speed depends on the browser, device memory, source codec, duration, and resolution, and tools that re-encode are not lossless.
Common questions
Can I just rename the file extension?
Usually not. Renaming does not change the container or codecs inside; this page performs a real conversion.
Is my video uploaded to DJAI?
No. The source file is read and processed in your browser on your device.
Why can the first run take longer?
The browser downloads an FFmpeg WebAssembly core of roughly 31 MB the first time processing is needed; caching can help later runs.
BUILD WITH DJAI
Want to build a tool like this one?
This tool runs entirely in the browser. Explore DJAI Academy’s practical building courses.