# Convert AVI to MKV > Convert AVI to MKV online for free. Runs entirely in your browser, so your files never leave your device. Fast batch conversion, no sign-up, no watermarks. URL: https://www.converterrr.com/avi-to-mkv - Runs in the browser with FFmpeg (WASM): files are not uploaded, and no credits are used. - Engines: FFmpeg (WASM) (browser), FFmpeg (cloud). - API: available. `POST /api/v1/jobs` with `"output_format": "mkv"` (paid plans). - More: [Video converter](https://www.converterrr.com/video-converter), [AVI converter](https://www.converterrr.com/avi-converter), [Compress AVI](https://www.converterrr.com/compress-avi). ## How to convert AVI to MKV 1. **Add your AVI files.** Drag and drop AVI files onto the converter, paste them, or click to browse. You can add several at once. 2. **Choose MKV.** MKV is already selected. Open Options if you want to change quality, size or metadata. 3. **Convert.** Click Convert. Your files are converted right in your browser in seconds. 4. **Download your MKV.** Download each MKV file, or everything at once as a ZIP. ## Good to know - AVI files are typically used for older camcorder footage and legacy video archives, while MKV is best for movies and series with multiple audio and subtitle tracks. - This conversion runs on FFmpeg (WASM), running locally in your browser — nothing is uploaded and it works even on slow connections. ## AVI vs MKV | | AVI | MKV | | --- | --- | --- | | Full name | Audio Video Interleave | Matroska Video | | Type | Video | Video | | Extensions | .avi | .mkv | | MIME type | video/x-msvideo | video/x-matroska | | Best for | older camcorder footage and legacy video archives | movies and series with multiple audio and subtitle tracks | | Properties | legacy format | open standard | **AVI:** AVI is Microsoft's classic video container from 1992. It's still found on older cameras and archives but lacks modern features. **MKV:** MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks in nearly any codec. The other way around: [convert MKV to AVI](https://www.converterrr.com/mkv-to-avi). ## Related conversions - [MKV to AVI](https://www.converterrr.com/mkv-to-avi) (in the browser) - [AVI to MP4](https://www.converterrr.com/avi-to-mp4) (in the browser) - [MP4 to MKV](https://www.converterrr.com/mp4-to-mkv) (in the browser) - [AVI to MP3](https://www.converterrr.com/avi-to-mp3) (in the browser) - [MOV to MKV](https://www.converterrr.com/mov-to-mkv) (in the browser) - [AVI to WebP](https://www.converterrr.com/avi-to-webp) (in the browser) - [GIF to MKV](https://www.converterrr.com/gif-to-mkv) (in the browser) - [AVI to MOV](https://www.converterrr.com/avi-to-mov) (in the browser) - [WebM to MKV](https://www.converterrr.com/webm-to-mkv) (in the browser) - [AVI to GIF](https://www.converterrr.com/avi-to-gif) (in the browser) - [AVI to WAV](https://www.converterrr.com/avi-to-wav) (in the browser) - [WMV to MKV](https://www.converterrr.com/wmv-to-mkv) (in the browser) ## Convert AVI to other formats [AVI to MP4](https://www.converterrr.com/avi-to-mp4), [AVI to MP3](https://www.converterrr.com/avi-to-mp3), [AVI to WebP](https://www.converterrr.com/avi-to-webp), [AVI to MOV](https://www.converterrr.com/avi-to-mov), [AVI to GIF](https://www.converterrr.com/avi-to-gif), [AVI to WAV](https://www.converterrr.com/avi-to-wav), [AVI to WebM](https://www.converterrr.com/avi-to-webm), [AVI to M4A](https://www.converterrr.com/avi-to-m4a), [AVI to FLAC](https://www.converterrr.com/avi-to-flac), [AVI to AAC](https://www.converterrr.com/avi-to-aac), [AVI to OGG](https://www.converterrr.com/avi-to-ogg), [AVI to WMV](https://www.converterrr.com/avi-to-wmv), [AVI to Opus](https://www.converterrr.com/avi-to-opus), [AVI to FLV](https://www.converterrr.com/avi-to-flv), [AVI to M4V](https://www.converterrr.com/avi-to-m4v), [AVI to MPEG](https://www.converterrr.com/avi-to-mpeg), [AVI to 3GP](https://www.converterrr.com/avi-to-3gp), [AVI to WMA](https://www.converterrr.com/avi-to-wma), [AVI to MPG](https://www.converterrr.com/avi-to-mpg), [AVI to TS](https://www.converterrr.com/avi-to-ts), [AVI to AIFF](https://www.converterrr.com/avi-to-aiff), [AVI to AMR](https://www.converterrr.com/avi-to-amr), [AVI to VOB](https://www.converterrr.com/avi-to-vob), [AVI to M4B](https://www.converterrr.com/avi-to-m4b) ## Convert other formats to MKV [MP4 to MKV](https://www.converterrr.com/mp4-to-mkv), [MOV to MKV](https://www.converterrr.com/mov-to-mkv), [GIF to MKV](https://www.converterrr.com/gif-to-mkv), [WebM to MKV](https://www.converterrr.com/webm-to-mkv), [WMV to MKV](https://www.converterrr.com/wmv-to-mkv), [M4V to MKV](https://www.converterrr.com/m4v-to-mkv), [3GP to MKV](https://www.converterrr.com/3gp-to-mkv), [FLV to MKV](https://www.converterrr.com/flv-to-mkv), [MPEG to MKV](https://www.converterrr.com/mpeg-to-mkv), [TS to MKV](https://www.converterrr.com/ts-to-mkv), [MPG to MKV](https://www.converterrr.com/mpg-to-mkv), [MTS to MKV](https://www.converterrr.com/mts-to-mkv), [VOB to MKV](https://www.converterrr.com/vob-to-mkv), [M2TS to MKV](https://www.converterrr.com/m2ts-to-mkv), [APNG to MKV](https://www.converterrr.com/apng-to-mkv), [OGV to MKV](https://www.converterrr.com/ogv-to-mkv), [MXF to MKV](https://www.converterrr.com/mxf-to-mkv), [DivX to MKV](https://www.converterrr.com/divx-to-mkv), [3G2 to MKV](https://www.converterrr.com/3g2-to-mkv), [RM to MKV](https://www.converterrr.com/rm-to-mkv), [RMVB to MKV](https://www.converterrr.com/rmvb-to-mkv), [F4V to MKV](https://www.converterrr.com/f4v-to-mkv), [ASF to MKV](https://www.converterrr.com/asf-to-mkv) ## AVI to MKV: frequently asked questions ### How do I convert AVI to MKV? Drop your AVI file onto the converter above, make sure MKV is selected, and click Convert. When it's done, download the MKV file — it usually takes a few seconds. ### Is it safe to convert AVI to MKV here? Yes. AVI to MKV conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server. ### Is the AVI to MKV converter free? Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250. ### Will converting AVI to MKV reduce quality? No — MKV preserves the content of your AVI file as faithfully as the format allows. ### Can I convert multiple AVI files at once? Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP. ### Can I convert MKV back to AVI? Yes — use our MKV to AVI converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.