MKV to MP4 Converter

1. Upload your MKV file (up to 500 MB).
2. Click 'Convert MKV to MP4' — takes 30 seconds to 3 minutes.
3. Download the MP4 — playable on every device.

MKV is a flexible container that holds any video codec — MP4 holds H.264/AAC, which every device supports. Converting MKV to MP4 makes your video play everywhere without quality loss.

MKV (Matroska) is a flexible container that can hold almost any video codec — from H.264 to HEVC to VP9. It's popular for high-quality video (Blu-ray rips, anime, web downloads). But many devices, editors, and platforms don't support MKV. Converting to MP4 (H.264 + AAC) makes your video play everywhere without re-encoding loss if the source is H.264.

The converter reads the MKV container. If the video codec is H.264 and audio is AAC (common), the streams are re-muxed into MP4 without re-encoding — the operation is lossless and fast. Otherwise, the video/audio is re-encoded to H.264/AAC. Output is a standard MP4 file.

• Converting Blu-ray MKV rips for phone playback.
• Uploading MKV to YouTube or social media.
• Making anime MKV files playable on TVs and phones.
• Shrinking large MKV files without quality loss.
• Preparing MKV for video editing workflows.
• Sharing MKV videos with people who don't support MKV.
• Standardizing an MKV library to MP4.

If the MKV video is H.264 and audio is AAC, conversion is lossless (re-mux only) — the output is bit-for-bit identical. Other codecs are re-encoded to H.264/AAC with quality preserved at high bitrates.

• Only the first audio track is preserved.
• Subtitles and chapters are not preserved.
• Some MKV files with HEVC or VP9 need re-encoding (slower).
• DRM-protected MKV files can't be converted.
• Very large files (500+ MB) may take several minutes.

• Output MP4 plays on every device, OS, and platform.
• Accepted by YouTube, Facebook, Instagram, TikTok, Twitter.
• Works with QuickTime, VLC, Windows Media Player, all phones.
• Editable in Premiere, Final Cut, DaVinci, iMovie.
• Standard MP4 — no special software needed.

• If the MKV is H.264/AAC, conversion is lossless and fast.
• HEVC or VP9 MKV files require re-encoding (slower).
• For 4K MKV files, conversion may take several minutes.
• Keep the original MKV if you have subtitle/chapter needs.
• For multi-audio MKV, only the first track is preserved.

Subtitles are missing in the MP4

Embedded subtitles aren't preserved. Extract them separately with MKVToolNix and re-mux into MP4 if needed.

Conversion is slow

HEVC and VP9 MKV files require re-encoding. H.264 MKV files are re-muxed quickly. Try a lower resolution for faster conversion.

Only one audio track in the MP4

MP4 typically supports one audio track. Use MP4 with multiple audio tracks only in specific players.

• Matroska — MKV Format
• MPEG — MP4 Specification