Turn your AVI into MKV, right in your browser — no upload, no signup.
AVI to MKV Converter turns your .avi file into .mkv entirely in your browser. Move an old .avi file into the more modern Matroska container — better subtitle and multi-audio-track support, and what most media servers expect. AVI and MKV both wrap the same H.264/AAC video and audio in this app, so most conversions are a fast repackage rather than a full re-encode — quality stays essentially identical and even a large clip converts in seconds, not minutes. Add your file, click convert, and download the result — nothing you upload ever leaves your device.
Drag and drop your .avi files, or click to browse. You can add up to 5 at once.
Click Convert — AVI and MKV usually just need repackaging, so it's typically done in seconds, even for a large file.
Save each .mkv file individually, or download every converted file at once as a .zip.
Your videos are processed locally and never leave your device.
Works straight in your browser — no software, no account, no email.
AVI and MKV usually just get repackaged, not re-encoded, so there's no quality loss and no long wait.
Convert as many videos as you like, with no limits or hidden fees.
Turn your MP4 into MOV, right in your browser — no upload, no signup.
Turn your MOV into MP4, right in your browser — no upload, no signup.
Turn your MP4 into AVI, right in your browser — no upload, no signup.
Turn your AVI into MP4, right in your browser — no upload, no signup.
Turn your MP4 into MKV, right in your browser — no upload, no signup.
Change your video's format in seconds, right in your browser — no upload, no signup.