MKV to AVI Converter Online Free

Create an AVI file for software or playback equipment that requires the legacy container. Check the verified codec and track limits before converting.

Or drop files here. Max file size 1GB.

Choose a file before converting.

Inmatningsformat

MKV video

MKV is a flexible Matroska container that can hold H.264, HEVC/H.265, VP9, AAC, Opus, multiple audio tracks, and subtitles. Older AVI-based software and devices may not understand those modern combinations.

Utdataformat

AVI video

AVI is an older Microsoft container still requested by some Windows programs, car stereos, DVD players, projectors, cameras, and industrial systems. The .avi extension does not guarantee playback because the device must also support the video and audio codecs inside it.

How to convert MKV to AVI for legacy playback

Use this converter when a player, device, or program specifically asks for an AVI file. The verified standard path re-encodes MKV video to MPEG-4 Part 2 and audio to MP3 inside AVI instead of only changing the file extension.

Uploads can be up to 1 GB, and the source resolution is kept unless you choose a different resolution. Check the target device manual for supported codecs before starting because some older AVI devices require a specific DivX or Xvid profile and may not accept every MPEG-4/MP3 AVI file.

  1. 1 Upload your MKV video file.
  2. 2 Keep AVI selected as the output format.
  3. 3 Check the target device requirements. Keep the source resolution, or choose another resolution if the device requires it.
  4. 4 Start the conversion. Processing begins immediately on a healthy compatible worker.
  5. 5 Download the AVI and test video and audio playback on the legacy device before deleting the original MKV.

Keep the MKV source as your master copy. The default AVI conversion re-encodes the media and does not preserve every subtitle or audio track.

What the verified MKV to AVI conversion does

Production-worker fixtures and a completed browser conversion establish the standard behavior below when no custom settings are saved.

Modern video is re-encoded

H.264, HEVC/H.265, and VP9 MKV fixtures all produced MPEG-4 Part 2 video in the downloaded AVI. Even H.264 input was encoded again, so this is not a lossless container swap.

AAC and Opus become MP3

AAC and Opus source fixtures both produced one MP3 audio stream. Audio quality can change because the source is decoded and encoded again.

One video and one audio track

A fixture with two audio tracks and an embedded subtitle produced one video stream and one audio stream. The second audio track and subtitle were not included in the AVI output.

The target device decides compatibility

AVI is a container, not a codec. The verified standard output is MPEG-4 Part 2 video with MP3 audio. Confirm the required codec, profile, and FourCC in the device manual because some older AVI equipment accepts only particular DivX or Xvid combinations.

MKV to AVI compatibility FAQ

Why convert MKV to AVI?

Choose AVI when older Windows software, a car stereo, DVD player, projector, camera, or another legacy system specifically requires an .avi file. For modern phones, browsers, TVs, and sharing, MP4 is usually the more compatible target.

What codecs does the default MKV to AVI conversion create?

Verified production-worker fixtures with H.264, HEVC/H.265, and VP9 video plus AAC or Opus audio all produced AVI with one MPEG-4 Part 2 video stream and one MP3 audio stream. The standard path re-encodes rather than only replacing the container.

Will converting MKV to AVI reduce quality?

It can. The verified standard path re-encodes the video and audio, including H.264/AAC sources. Re-encoding is not lossless. Keep the original resolution and use suitable quality settings when preserving detail matters.

Will the AVI file be larger than the MKV?

It may be larger or smaller. File size depends on the source codecs, duration, resolution, motion, and selected quality and bitrate. Modern HEVC or VP9 sources can expand when re-encoded to MPEG-4 Part 2, while other sources may become smaller.

Are MKV subtitles and multiple audio tracks preserved in AVI?

Do not rely on them being preserved. In the verified multi-track fixture, the AVI kept one video stream and one audio stream but dropped the second audio track and embedded subtitle. Keep the MKV original if those tracks matter.

Will the converted AVI play on every old device?

No. AVI only identifies the container. The device must also support the video and audio codecs inside it. The standard output is MPEG-4 Part 2/MP3; some older AVI devices require a particular DivX or Xvid profile or FourCC. Check the manual and test the download.

Can I keep Full HD or a larger source resolution?

Yes. The converter keeps the source resolution unless you choose another setting, including Full HD and larger dimensions, as long as the uploaded MKV is within the 1 GB size limit.

Related video converters

Choose the target that matches the player, editor, or device where the file must work.

MKV till MP4 MKV to MOV MP4 to AVI AVI till MP4 MKV Converter Konverterar AVI Videokonverterare

What happens when MKV becomes AVI

Källformat

MKV is a flexible Matroska container that can carry multiple audio, video, and subtitle tracks.

Målformat

AVI is an older video container whose playback support depends on the codecs inside it.

Vilka förändringar

The MKV container is read and the selected video and audio streams are written into a AVI container.

Codecs may be transcoded even when the visible resolution and duration stay the same.

Vad som bevaras
Duration, frame order, and visible dimensions are preserved unless you select trimming, frame-rate, or resolution changes.
What may be lost
Extra subtitle, attachment, chapter, or alternate audio tracks may be omitted when the target container or selected settings do not support them.
Codec and quality implications
Container names do not guarantee a codec. Quality and compatibility depend on the selected video codec, audio codec, bitrate, frame rate, and resolution.
Realistic limitations
A valid MKV extension does not guarantee that every codec inside the container is decodable. Corrupt, encrypted, or unusual streams can fail.

Konverteringssteg

  1. Upload a MKV file no larger than 1 GB.
  2. Confirm that AVI is selected as the target.
  3. Open settings only if you need to change codec, quality, bitrate, frame rate, resolution, or audio behavior.
  4. Start the conversion. A healthy compatible worker begins processing immediately.
  5. Download the AVI file and check the result before deleting your source.

Problemlösning

The MKV file is rejected or will not open.
Confirm that the file is not empty, password-protected, or corrupt and that its real format matches the extension.
The AVI file is larger than expected.
Choose a more efficient codec or lower quality setting when available. Lossless and uncompressed targets are often larger by design.
The result has no sound or will not play.
Try a broadly supported target codec and verify that the source contains a decodable audio stream.

Sekretess och filförvaring

Uploads and converted files are processed automatically and irreversibly deleted within 24 hours. You can delete them sooner with the delete control. Convertr does not read, mine, sell, or manually review file contents.

Read the privacy policy

Användbara alternativ

MKV to AAC Use this when AAC better matches the app, codec, or editing workflow you need. MKV to AIFF Use this when AIFF better matches the app, codec, or editing workflow you need. AVI to MKV Use the reverse conversion when you need to return to the original format family.