MKV → Twitter / X
Compress MKV for Twitter / X
Compressing MKV for Twitter / X comes down to three constraints: Twitter / X's 512 MB cap, its 1920:1200 resolution ceiling, and the need to output MP4 H.264 for reliable inline playback. MKV source files are typically 1080p (often with HEVC + multi-audio) at around 250 MB per minute — right at Twitter / X's 500 MB target. We calculate a per-clip bitrate budget from your duration, subtract 128 kbps for audio, and allocate the remainder to H.264 video at the highest quality that fits. MKV's multi-track structure collapses to single video + single audio during conversion; subtitle tracks are dropped. Twitter / X's inline player handles MKV inconsistently; MP4 output is the reliable answer.
Where do you want to share your video?
How to compress MKV for Twitter / X
- 1Drag your .mkv file onto the upload zone above (or browse to it).
- 2Twitter / X is already selected — we'll target 500 MB to stay safely under the 512 MB cap.
- 3Optionally trim to a highlight clip or switch to H.265 for 30-50% smaller files at the same quality.
- 4Download the compressed MP4 and share it on Twitter / X. Source file auto-deletes from our servers after 1 hour.
What to know about MKV → Twitter / X
- MKV's multi-track structure collapses to single video + single audio during conversion; subtitle tracks are dropped.
- Resolution is kept at up to 1920p when the bitrate budget allows.
- Trim to the highlight before you compress — every 10 seconds you cut gives remaining frames more bitrate to work with.
- Twitter / X's 500 MB target leaves a 5% safety margin below its 512 MB hard cap, so platform-side rejection is never an issue.
The compression math
A 1-minute MKV at 1080p (often with HEVC + multi-audio) = ~250 MB. Twitter / X's 500 MB target minus 128 kbps audio = ~69777 kbps video budget. H.264 at that budget kept at up to 1920p when the bitrate budget allows produces a file at the target size that plays inline on Twitter / X.
About MKV files
MKV (Matroska Video) is an open-source container format that supports virtually any video and audio codec, along with multiple subtitle tracks. It's the preferred format for archiving movies, TV shows, and anime because it preserves everything in a single file. However, MKV files are often very large (1GB or more) and are not accepted by social media platforms, messaging apps, or most mobile devices. CompressYourVideo.com converts MKV to a compressed MP4 that you can share anywhere. During conversion, the tool selects the primary video and audio tracks and compresses them to your target size. Subtitle tracks are not preserved in the compressed output since social platforms don't support embedded subtitles.
About Twitter / X
Compress videos for Twitter/X. Twitter's free tier allows up to 512MB, but videos must be under 2 minutes 20 seconds. X Premium users get 16GB and longer duration.
Related compression tools
Or compress MKV for a different platform