How it works
Complete the job in three clear steps
- Choose or enter an MKV video.
- Set the available options and create an MP4 video.
- Review and download the result before leaving the page.
Private Lucaden video & audio tool
MKV to MP4 Converter
Convert the primary MKV video and optional audio streams into a browser-friendly MP4.
Free to use Your source stays on this device; FFmpeg WebAssembly processes it in temporary browser memory.
Loading tool workspace…
Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
Convert the primary MKV video and optional audio streams into a browser-friendly MP4.
Lucaden creates a separate result and leaves the original unchanged. Browser memory and device performance set practical limits for very large files.
Included capabilities
- Primary video mapping
- Optional audio mapping
- H.264 and AAC output
- Local preview
Useful for
- Play a clip in browsers
- Prepare a presentation video
- Standardize an archive copy
- Share a compatible file
Questions
About this tool
Are subtitle tracks copied?
No. This focused conversion exports the primary video and optional audio streams.
Does it support every MKV codec?
Only codecs included in the browser FFmpeg build can be decoded.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.