Queue AVI files
Add one or more non-empty .avi videos up to 100 MB each. Each queued item keeps a source preview where the browser can decode it.
Free online AVI to MKV converter
Create fresh MKV files from AVI videos.
Queue AVI videos, encode the first video stream and optional first audio stream into a new MKV, then preview and download every result.
- Files not stored
- Queue AVI files
- 100 MB each
Processed by our self-hosted conversion engine
Supported files
AVI in. MKV out.
AVIMKV
Add AVI video files up to 100 MB each. Fileverses creates a new MKV result with this route’s documented conversion profile; review the completed download before using it elsewhere.
How it works
One queue. A new MKV file.
Create new MKV files
Start the queue to have FFmpeg encode the first video stream as H.264 and the optional first audio stream as AAC in a new MKV.
Check and download
Review the completed MKV preview where the browser supports it, then download the separately named result for that queue item.
Limits and quality
A new MKV file, with source-specific trade-offs.
Every successful result is a newly encoded MKV with H.264 video and AAC audio when the source has a first audio stream. It is not a container-only remux.
Convert AVI nowAVI sources only
This route accepts non-empty .avi files up to 100 MB each. The selected source must also be readable by the host FFmpeg installation.
Fresh H.264 and AAC encode
Every successful result is a newly encoded MKV with H.264 video and AAC audio when the source has a first audio stream. It is not a container-only remux.
First streams, fixed settings
The profile maps only the first video stream and optional first audio stream, removes source metadata and chapters, and offers no subtitle or alternate-track selection, trimming, resizing, bitrate, codec, or quality controls.
AVI to MKV FAQ
Questions, answered.
What AVI files can I convert to MKV?+−
This route accepts non-empty .avi files up to 100 MB each. The host FFmpeg installation must also be able to read the selected source.
What does the converted MKV contain?+−
A successful result is a newly encoded MKV with H.264 video. If the selected AVI has a first audio stream, the result also includes newly encoded AAC audio.
Does AVI to MKV preserve every stream?+−
No. The profile uses only the first video stream and optional first audio stream. It does not promise subtitles, attachments, chapters, alternate tracks, source metadata, or original-codec retention.
Can I convert several AVI videos at once?+−
Yes. Add multiple supported AVI files to the queue. The browser submits real conversions sequentially, and each successful row receives its own MKV preview where supported and a download button.
Will the MKV be smaller or look identical?+−
Not necessarily. The route makes a new H.264 and optional AAC encode at fixed settings, so final size and visual or audio detail vary with the source. Check the result before use.
Can I choose subtitles, trim, or change resolution?+−
No. This route has no editing, stream-selection, resizing, subtitle, quality, bitrate, or codec controls.
Is every MKV workflow guaranteed to support the result?+−
No. The route writes H.264 video and optional AAC audio in MKV, but destination, browser, and application support still varies. Test the downloaded file in your required software.
Are files retained after conversion?+−
Each source and output exists in a temporary server directory only while its job runs. The directory is removed whether conversion succeeds or fails.