Convert AVI to MKV for Multi-Track Archival

Convert your Audio Video Interleave files to Matroska Video online for free. AVI produces large files, lacks modern streaming support, and has limited codec flexibility — MKV solves that. No registration, no watermarks, instant download.

Drag & drop your file here, or

Max 500 MB · Max 30 min · Max 4K

How to Convert AVI to MKV — 3 Steps

FFmpeg re-encodes your AVI file to H.264, H.265, or VP9 MKV — multi-track archival.

  1. Upload your AVI file

    Select your AVI file from old camcorders. Files up to 500 MB and 30 minutes in duration are accepted.

  2. Confirm and convert

    Confirm you own the file and click Convert to MKV. Processing typically completes in under 60 seconds.

  3. Download your MKV file

    Download your MKV immediately — ready to store multiple audio tracks (e.g. different languages) in one file.

Why Convert AVI to MKV?

AVI (Audio Video Interleave) produces large files, lacks modern streaming support, and has limited codec flexibility. Converting to MKV gives you multi-track and subtitles.

Multi-trackStore multiple audio tracks (e.g. different languages) in one file
SubtitlesEmbed SRT, ASS, or PGS subtitle streams directly in the container
Any codecMKV accepts H.264, H.265, VP9, AV1, and virtually any video codec
Lossless remuxPackage Blu-ray or DVD streams into MKV without re-encoding
ChaptersMKV supports chapters and navigation metadata like Blu-ray discs
ArchivalPreserve original streams for long-term storage without transcoding

Frequently Asked Questions

Why convert AVI to MKV?

AVI (Audio Video Interleave) produces large files, lacks modern streaming support, and has limited codec flexibility. Converting to MKV gives you store multiple audio tracks (e.g. different languages) in one file.

Will I lose video quality converting AVI to MKV?

Our converter outputs H.264, H.265, or VP9 video at high-quality settings. When re-encoding is required, we use settings that minimise visible artefacts. The resulting MKV file will be visually very close to the original.

What AVI files can I upload?

You can upload AVI files from old camcorders, legacy Windows software, older screen recorders, and DVD rips. Files must be under 500 MB, under 30 minutes in duration, and not exceed 4K (3840�2160) resolution.

What is the maximum file size for AVI to MKV conversion?

The maximum upload size is 500 MB for video/audio and the maximum video duration is 30 minutes. Resolution is capped at 1920×1080 (1080p).

Is my AVI file kept private?

Yes. Files are processed privately and automatically deleted within 60 minutes. We never store, sell, or analyse your content.

AVI & MKV Format Guides

Understand the formats you're converting between — specs, pros, cons, and use cases.

What is AVI?Full guide — technical specs, pros, cons, and compatible softwareWhat is MKV?Full guide — technical specs, pros, cons, and compatible softwareAll Format GuidesBrowse all 14 video and audio format guides

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