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Convert AVI videos to MKV format instantly in your browser. No upload required, completely free.
Upload your AVI file, click Convert, and download the MKV output. All processing happens locally using FFmpeg WebAssembly.
Upload your AVI file
Drop a .avi file onto the upload zone.
Convert
Click "Convert to MKV". FFmpeg remuxes the AVI content into the more modern MKV container.
Download
Save the MKV for use in media players that support the Matroska format.
Add Subtitle Tracks
MKV supports multiple subtitle tracks in one file — convert AVI and add external subtitles in the MKV container.
Multiple Audio Tracks
Store multiple language audio tracks in a single MKV file — not possible with the AVI container.
Home Media Server
Plex and Jellyfin prefer MKV — convert your AVI library for a better home media server experience.
VLC & Kodi Playback
MKV is the preferred format for VLC, Kodi, and HTPC setups that benefit from its chapter and metadata support.
Video Archiving
MKV is an open format with no patent restrictions — ideal for long-term lossless video archiving.
Chapter Markers
Add chapter points to your video — MKV supports chapters natively while AVI does not.
Lossless Stream Copy
AVI content is remuxed into MKV without re-encoding — zero quality loss, instant conversion.
Modern Open Container
MKV (Matroska) is an open, patent-free container with broad support in modern players and servers.
100% Browser-Based
FFmpeg WebAssembly processes your video locally — no server upload, no privacy risk.
Multiple Track Support
MKV output can hold multiple audio tracks, subtitle streams, and chapter metadata.
No File Size Limits
Local processing means no server-enforced upload limits on your AVI file size.
Free to Start — Sign Up for More
Use free with no account for files up to 40 MB. Sign up free to raise your limit to 80 MB, or upgrade to Pro for 250 MB per file.
Also Known As
AVI to MOV
Convert AVI videos to MOV format
AVI to MP3
Extract audio from AVI and save as MP3
AVI to MP4
Convert AVI videos to MP4 format
Change Video Speed
Speed up or slow down video playback
Compress Video
Compress video file size without losing quality
Extract Audio from Video
Extract high-quality audio from any video file
Trusted Worldwide
iLoveDocsTools is used by students, professionals, and businesses across the United States, Canada, United Kingdom, Australia, India, and more than 100 other countries. All tools are browser-based and process files privately — your files never leave your device. Free to use, with Pro plans for unlimited access.
All processing happens directly in your browser. Your documents are never sent to any server — complete privacy guaranteed for users in the USA, Canada, UK, and worldwide.
Every tool on iLoveDocsTools is free to use. Need more? Upgrade to Pro for unlimited usage, priority access, and no daily limits. Trusted by students, freelancers, and teams across North America and Europe.
Whether you are on a Mac, Windows PC, iPhone, or Android in New York, Toronto, London, or Sydney — our tools work instantly in any modern browser.
Looking for free PDF tools in the USA? Free document converters in Canada? Online PDF editors in the UK or Australia? iLoveDocsTools offers 70+ free tools — merge PDF, split PDF, compress PDF, convert Word to PDF, Excel to PDF, JPG to PDF, and many more — all free, all instant, all private. No watermarks. No file size limits. Just free tools that work.