What's the best way to compress MKV for WhatsApp?

Upload your .mkv file, pick WhatsApp as the platform (it's already selected on this page), and compress. We'll target 15.2 MB to stay safely under WhatsApp's 16 MB cap. Output is MP4 H.264 that plays inline on WhatsApp.

Does WhatsApp accept MKV files directly?

WhatsApp supports MP4, 3GP, and MOV. MKV needs to be converted to MP4 to send as a video message on WhatsApp — otherwise it sends as a generic file attachment.

Will quality drop when compressing to fit?

For short clips under a few minutes, the difference is hard to notice on a phone screen. For longer videos, we scale down resolution (1080p → 720p) before degrading quality at the original size. You can also trim the video to the highlight reel before compressing — that preserves full visual quality in the kept portion.

Do I need an account?

No. Upload, compress, download. Files auto-delete from our servers after 1 hour. No signup, no watermark, no email required.

MKV → WhatsApp

Compress MKV for WhatsApp

MKV files are almost always big — they're the format people use for movies and TV rips, not messaging. Sending an MKV as a WhatsApp document (which works up to 2 GB) strips the inline video player; recipients see a generic file and have to tap download-then-open in an external player. This page converts MKV to a MP4 H.264 single-track video under 16 MB, which restores inline playback. If your MKV is a movie clip or long show segment, you should trim it to a highlight first — 16 MB at 30 seconds looks good, 16 MB at 10 minutes looks like a PowerPoint.

16 MB targetInput: MKVOutput: MP4 H.264

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How to compress MKV for WhatsApp

1Drag your .mkv file onto the upload zone above (or browse to it).
2WhatsApp is already selected — we'll target 15.2 MB to stay safely under the 16 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 WhatsApp. Source file auto-deletes from our servers after 1 hour.

What to know about MKV → WhatsApp

WhatsApp sends MKV only as a generic document (no inline play) — MP4 is the fix.
Movie/show MKVs: trim to the scene you want to share before uploading here.
Multiple audio tracks collapse to one (the first) — use a desktop tool like MKVToolNix for precise control.
10-bit HEVC inside MKV gets transcoded to 8-bit H.264 (WhatsApp requirement).

The compression math

A 2-minute 1080p MKV clip with HEVC + 2 audio tracks = ~350 MB. WhatsApp 15.2 MB − 128 kbps audio = 890 kbps video. Transcode to H.264 720p, CRF 30 = ~14 MB. Plays inline.

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 WhatsApp

Compress videos to send on WhatsApp. WhatsApp limits videos to 16MB for regular messages. Our tool ensures your video fits while keeping the best possible quality.

Related compression tools

Compress any MKV video Compress any format for WhatsApp

Or compress MKV for a different platform

MKV → Discord MKV → Email MKV → Telegram MKV → Instagram MKV → IG Story MKV → TikTok MKV → YT Shorts MKV → Facebook