MKV to MP4 converter.
Convert MKV files to MP4 so they play on any phone, TV, or editor, no upload, no account.
Drop a video here or click to browse
MKV · processed privately, never uploaded
MKV is a flexible container, but it won't play on iPhones, most TVs, PowerPoint, or many editors. Converting to MP4 (H.264) fixes that while keeping the picture and sound intact, and it all happens on your device.
Why MKV won't play and MP4 will
MKV (Matroska) is an open container often used for high-quality rips and multi-track files, but Apple devices, most smart TVs, Microsoft Office, and plenty of editing apps simply don't recognize it. MP4 with H.264 video is the one format that plays on essentially everything, iPhone, Android, Windows, macOS, browsers, TVs, and social platforms. Converting rewraps and re-encodes your video into that universal format so it opens without a special player.
Keep quality while shrinking size
The visual quality depends on resolution and quality level, not the MKV-to-MP4 change itself. High-bitrate MKV rips can be large; if you don't need full resolution, cap it at 1080p or 720p to cut the file substantially. Keep the quality level High when the source detail matters, or step down to Balanced or Small to fit an upload limit. Converting won't upscale, so a 720p MKV stays 720p.
After converting
The MP4 you get plays natively in QuickTime, Windows Media Player, VLC, browsers, and mobile galleries, and it drops straight into editors like Premiere, DaVinci Resolve, and CapCut. Multi-track MKVs are simplified to the primary video and audio track. If you needed a specific alternate audio track, pick it in a player before converting, since the MP4 keeps the main streams.
Tips
- Cap resolution at 720p or 1080p to turn a large MKV rip into a shareable MP4.
- Keep quality High if the MKV is a high-detail source you want to preserve.
- The result plays on iPhone and in PowerPoint, where the original MKV would be rejected.
- Converting won't upscale, the MP4 matches the MKV's resolution unless you cap it lower.
How it works
- 01
Drop your MKV
Select the .mkv file, it stays on your device, nothing is uploaded.
- 02
Choose quality
Optionally cap the resolution to shrink the result; Balanced suits most videos.
- 03
Download MP4
Get a universal .mp4 that plays everywhere MKV won't.
Questions
- Why won't my MKV play, but the MP4 will?
- MKV isn't supported by iPhones, most TVs, PowerPoint, or many editors. MP4 (H.264) plays on virtually every device and app, which is why converting fixes playback.
- Will converting MKV to MP4 lose quality?
- There's a small re-encoding trade-off, but at a High quality setting and matched resolution the difference is hard to see.
- Is there a file size limit?
- Large MKV rips can be demanding; on a desktop you can comfortably handle files up to a few hundred MB. Capping resolution helps big files convert smoothly.
- Is my MKV uploaded anywhere?
- No. The file is processed entirely on your device and never leaves it, no upload, no account, no watermark.