File Converter

GIF to MKV converter Free, private, no upload.

Convert GIF files to MKV right in your browser. MKV can hold multiple audio and subtitle tracks and is popular for media libraries like Plex and Jellyfin. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert GIF to MKV

  1. 1 Drop your GIF files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 MKV is already selected as the output. Optionally open Options to adjust quality, resolution, frame rate.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

GIF · Graphics Interchange Format

GIF is a 256-colour image format best known for short looping animations. It is old, widely supported and relatively large.

MKV · Matroska video

MKV is a flexible open container that can hold many video, audio and subtitle tracks. It is common for films and screen recordings (OBS).

The conversion runs on your device using FFmpeg compiled to WebAssembly. You can adjust: quality, resolution, frame rate, encoder speed, remove audio, start at, end at.

Frequently asked questions

How do I convert GIF to MKV?

Drop your GIF files onto the page, or click “Choose files”. You can add many at once, or a whole folder. MKV is already selected as the output. Optionally open Options to adjust quality, resolution, frame rate. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting GIF to MKV reduce quality?

MKV uses lossy compression, so some detail is traded for a smaller file. At the default quality the difference is very hard to see or hear, and you can raise the quality setting if you need more.

Can I convert multiple GIF files to MKV at once?

Yes. Add as many GIF files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

Convert other formats to MKV

See everything the GIF converter and the MKV converter can do.