Step 1: Provide your MKV files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted AVI files.
MKV to AVI Conversion FAQ
How do I convert MKV to AVI without re-encoding the video stream?
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When the MKV and AVI containers can both carry the same codec (H.264, H.265, VP9, AV1), the converter falls back to a remux: the elementary streams are copied byte-for-byte into the AVI container and only the wrapper changes. A remux of a 1 GB MKV into AVI typically finishes in 5-15 seconds with zero quality loss. MKV is codec-agnostic: H.264, HEVC, VP9 and AV1 video sit happily beside AAC, FLAC, Opus, DTS or Dolby audio in the same file. AVI files predate modern codecs: expect MPEG-4 Part 2 (DivX/Xvid), Motion JPEG or raw uncompressed frames rather than H.264.
What happens to the subtitle tracks in my MKV file?
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They cannot stay selectable, because AVI has no soft-subtitle stream to hold them. There are two ways out: burn them into the video during conversion, which makes them permanent and unstyleable, or export them as a separate .srt alongside the AVI for the player to load. The converter tells you which it did rather than dropping them silently. AVI has no native support for modern codecs, variable frame rate, soft subtitles or files over 4 GB without hacks, and its per-chunk overhead bloats the file.
What happens to 5.1 surround audio when converting MKV to AVI?
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It is downmixed to stereo, because AVI has no dependable multichannel path. The fold-down uses the standard ITU coefficients so dialogue in the centre channel stays intelligible and the surrounds come in at reduced level rather than vanishing. Anything that relied on discrete channel placement is gone after that.
Why would I convert MKV to an older format like AVI?
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Because a lot of hardware never learned anything newer and never will. DVD players, in-car head units, camcorder playback modes, industrial displays and plenty of broadcast ingest equipment accept AVI and nothing else. The conversion is a deliberate step down in efficiency, bought in exchange for working on a device that has no other option. AVI is trivially simple, which is exactly why ancient camcorders, capture cards, DVD ripping tools and Windows-era software all still emit it.
Will multi-track audio survive MKV to AVI conversion?
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Yes — every audio track in the MKV (director commentary, alternate languages, descriptive audio) is preserved in the AVI when the target container supports multi-stream audio. MKV and MOV handle unlimited audio tracks; MP4 supports many but some hardware players only see track 1; WebM is capped at one Opus / Vorbis track. AVI is Microsoft’s Audio Video Interleave, introduced in 1992 on top of the RIFF chunk format — one of the oldest containers still in circulation.
Are subtitle tracks preserved when converting MKV to AVI?
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Soft subtitles (selectable tracks) survive when AVI can carry them: MKV holds SRT, ASS, SSA, PGS, VobSub natively; MP4 only holds mov_text (a stripped-down format). Converting an MKV with ASS styled subs to MP4 will typically downgrade them to mov_text or burn them in. Hardsubs (burned into the video) carry over regardless.
Does MKV to AVI keep chapter markers / DVD-style navigation?
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Chapter metadata transfers between MKV and AVI whenever both containers support a chapter atom (MKV, MP4, MOV). WebM stores chapters in a Matroska-compatible block, so MKV <-> WebM chapters round-trip cleanly. AVI has no chapter spec at all, so an AVI source arrives with no chapters to carry across and an AVI target cannot store the ones it was handed; add markers manually afterwards if you need them.
What about MKV attachments (fonts, cover art) when going MKV to AVI?
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MKV is the only mainstream container that stores arbitrary attached files (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Going from MKV to AVI drops these attachments when AVI is not MKV — the elementary streams convert, but the attached payload stays in the source. Keep MKV as a backup if you depend on attached fonts.
Which codec does the AVI output use by default?
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The default codec is chosen to match the AVI container conservatively: MKV defaults to H.265 (HEVC) for better compression; MP4 defaults to H.264 for the widest device support; WebM defaults to VP9; AVI uses MPEG-4 ASP (DivX/Xvid lineage). Override via the advanced codec dropdown — AV1 is available for MKV / WebM where you want maximum compression and can wait through the encode.
How does HDR (HDR10, Dolby Vision) survive MKV to AVI?
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HDR static metadata (HDR10 mastering display values, max content light level) carries through to AVI when both containers and the chosen codec support it (HEVC, AV1 in MKV / MP4). Dolby Vision is more fragile — DV profile 5 / 7 / 8.1 in MKV commonly survives only into MKV with HEVC; converting to an AVI container that does not carry the DV layer flattens to HDR10.
Will the MKV to AVI converter keep variable framerate (VFR)?
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MKV and WebM record real per-frame timestamps and handle VFR natively, so MKV VFR survives into an AVI of those formats with no resampling. MP4 nominally stores timestamps too but some players assume CFR; the converter exposes a "force CFR" toggle that resamples VFR MKV to 24 / 30 / 60 fps AVI for problematic targets.
Why is my AVI file smaller / larger than the MKV after conversion?
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Same-codec remux produces a near-identical size (container overhead differs by 0.1-2%). A codec change can swing the size by 50% or more: H.264 to H.265 typically halves the file at the same visual quality; H.264 to AV1 halves it again on a slow preset. Going from a high-bitrate MKV (Blu-ray rip) to a low-bitrate AVI (web upload) is the most common reason for a dramatic drop.
