Free online AVI→MKV converter. Fast, private, no sign-up.
Going from AVI to MKV takes a couple of clicks: drop the file in, download the result. Drop in your AVI file (a .avi) and download a ready-to-use MKV file (a .mkv) — no software to install, no account to create, and no watermark on the output.
AVI is a long-lived Microsoft container — widely readable, but its older codecs are far less efficient than modern formats, so files tend to be large.
MKV (Matroska) is a flexible open container that can hold almost any codec plus multiple audio tracks and subtitles, popular for archiving.
Most people convert AVI to MKV for compatibility — a website, app or device insists on MKV, and AVI simply won't open. MKV is widely supported, which makes it a dependable target. The conversion runs through ffmpeg, the industry-standard media engine, re-encoding the streams with sensible high-quality defaults so the result plays cleanly on your target device.
You might be optimising images for a faster-loading page, exporting for a specific app or marketplace, or just making sure a colleague on a different device can open what you send.
Privacy is the default here. Your AVI file is uploaded over an encrypted connection, converted, downloaded the moment it's ready, and then deleted automatically a short time afterwards. We never keep your files, never build a library of your content, and never make you sign up to download the result.
Ready? Use the converter above, or explore related conversions: turn AVI into a different format, or convert another format into MKV. Everything on Convert Me Pls is free, unlimited and watermark-free.
Yes. Convert Me Pls is completely free with no sign-up, no file-count limits and no watermarks added to your output.
Your files are uploaded over an encrypted connection, converted, and then deleted automatically a short time afterwards. We never keep your files and never build a library of your content.
We use the best available encoders (libvips, ImageMagick and ffmpeg) at high-quality settings for the cleanest possible result.
Conversions run on our servers and support large files comfortably; very large media is processed in a streaming pipeline.