Is this MKV to AVI converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple MKV files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

How large can my video files be?

Free accounts support files up to 10 MB — enough for short clips and GIFs. Pro raises that to 500 MB, which covers most 1080p videos. For files over 1 GB, a native app like HandBrake will be faster.

Will the video lose quality during conversion?

When only the container changes (e.g., MKV → MP4 where both use H.264), there's zero quality loss — it's a lossless rewrap. When the codec changes, we encode at CRF 23, which is near-transparent for most content.

Is there quality loss when converting MKV to AVI?

If the video codec is compatible with AVI (H.264 or MPEG-4), the video stream is remuxed without re-encoding — no quality loss. If the codec isn't AVI-compatible, re-encoding occurs, which may reduce quality slightly.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

MKV to AVI Converter — Free, Fast, No Upload

How to convert MKV to AVI online

1
Drop your MKV file
Drag and drop your Matroska Video file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Matroska Video → Audio Video Interleave entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your AVI
Your Audio Video Interleave file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

MKV vs AVI: format overview

MKV

Matroska Video

Matroska.org · 2002

Compression: lossy
Transparency: No

✓ Supports virtually any codec combination
✓ Multiple audio tracks and subtitles per file
✗ Not natively supported by iOS or older devices

AVI

Audio Video Interleave

Microsoft · 1992

Compression: lossy
Transparency: No

✓ Universal Windows compatibility
✓ Simple container format — widely supported

MKV magic bytes: 1A 45 DF A3

AVI magic bytes: 52 49 46 46 xx xx xx xx 41 56 49 20

Why convert MKV to AVI?

MKV is a modern container format that supports virtually any codec, multiple audio tracks, subtitle streams, and chapter markers. It is the format of choice for personal media libraries and content stored on Plex or Jellyfin servers. However, certain hardware players, older smart TVs, in-car entertainment systems, and DVD authoring tools do not support MKV playback. If your media player or device displays a format error when trying to play an MKV, converting to AVI often resolves the issue on legacy hardware.

AVI has broad hardware support precisely because it is old. Media players built into televisions from the mid-2000s through the early 2010s, external USB media players, and some older Sony and Samsung TV firmware versions play AVI with DivX or Xvid encoding reliably. Windows Movie Maker, older versions of Vegas Pro, and legacy DVD authoring tools like DVD Flick also accept AVI as a primary input format. For workflows that involve older Windows-based video editing software, AVI remains the path of least resistance.

Converting MKV to AVI requires re-encoding the video, since AVI does not support all the codecs that MKV can contain. The output quality depends on the target codec and bitrate settings. At sufficiently high bitrates, the quality loss relative to the original MKV is minimal. However, features like multiple audio tracks, subtitles, and chapter markers cannot be preserved in the AVI container and will be stripped during conversion. Only the primary video and audio track will carry over to the output file.

Quality & file size: MKV to AVI

Typical file sizes: MKV 200–800 MB → AVI 200–600 MB.

Both MKV and AVI use lossy compression. We transcode at high quality settings (equivalent to AVI's recommended web quality) to minimize generational loss.

Color depth: MKV supports standard color, AVI supports standard color.

Transparency: MKV does not support transparency. AVI does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your MKV files are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.