Is this AVI to MKV converter free?

Yes. You can convert AVI to MKV online for free, with no account and no watermark.

Do I need to install software or sign up?

No. The conversion runs entirely in your browser — no installs and no account required.

Will converting AVI to MKV reduce quality?

MKV uses lossy compression, so the file can get smaller while some visual quality may change.

Yes. Files are processed only to complete the conversion and are auto-deleted after 2 hours. We never share them.

Can I convert multiple AVI files at once?

Yes. Drop several files to convert them in a batch and download the results as a single ZIP.

AVI to MKV Converter

Need to convert this file type? Drop it below — or drop any other file and we'll auto-switch. Outputs are auto-deleted after 2 hours; share links expire after 4.

Preset: AVI → MKV · or drop a different file and we'll auto-switch

Drop a file here, or click to browse

PDF · Word · Excel · JSON · XML · Images · Video · Audio · Archives · CAD · 3D

Maximum file size: 100 MB.

Or paste a link to a file

Drop multiple images to combine them into one PDF, Word document, or PowerPoint presentation — or convert each image separately.

Drop

Drag your AVI file or click to browse.

Convert

MKV is preselected, or pick a different format below.

Download

Get your file or share a 1-hour link.

Convert AVI to MKV online

Use this AVI to MKV converter to turn AVI files into MKV right in your browser — ideal for high-quality video, multiple audio and subtitle tracks and archiving. MKV is valued for being holds many tracks, while AVI comes with a tradeoff: large files.

When should you convert AVI to MKV?

To reduce file size and make uploading and sharing easier
To get MKV's built-in advantage: holds many tracks
To move past AVI's common limitation: large files
To open your files in apps that prefer MKV

About AVI and MKV files

AVI video

Strengths

widely recognized
simple container

Limitations

large files
dated format

MKV video