Convert AVI to MKV
AVI into a container that isn't from 1992, without picking a delivery format yet.
It happens on your device. Nothing is uploaded — including video.
↑ 0 bytes uploaded
What changes when you convert AVI to MKV
- Onhand reads AVI but does not write it — the demand runs one way, out of AVI and into something with broader support.
- MKV is lossy. The quality control is a real trade, not a placebo — Smallest, Balanced and Best produce genuinely different files.
- Most browsers cannot read AVI on their own, so this pair usually loads a 9.7 MB engine the first time you use it — once, then cached, and the page tells you before it starts. If your browser happens to have the codec built in, it is used instead and nothing is downloaded.
How to do it
- Drop your AVI file above, or click to browse. A whole folder works too.
- MKV is already selected. Change it on any row if you want something else.
- Pick a quality — Smallest, Balanced or Best. Balanced is a good default.
- Press Convert, then Save. Nothing left your machine.
Questions
- Is my AVI file uploaded anywhere?
- No. The conversion runs inside this browser tab using WebAssembly. There is no server involved, which is why there is no file-size cap, no queue and no account. The counter in the header measures bytes this page sends, and it stays at zero.
- Is there a file size limit?
- No imposed limit, but a real one: a browser tab has roughly 1.8 GB of working memory. Onhand estimates before it starts and tells you if a file is too large, rather than failing halfway through.
- Does it work offline?
- After one visit, yes. The page and the codecs it has used are cached, and the badge appears only when the codecs for your chosen formats are genuinely available offline — not merely because something is installed.
- Can I convert several files at once?
- Yes. Drop a folder, or select many files. Each row gets its own target format, or you can set them all at once, and everything downloads as a single zip.