Convert MKV to MP4 — Play Your Videos Everywhere
MKV is a powerful container format loved by media enthusiasts, but most phones, smart TVs, and social platforms simply will not play it. Converting MKV to MP4 gives you universal compatibility without sacrificing quality. When your MKV already uses H.264, our converter can remux the file nearly quickly — no re-encoding needed.
After conversion, you can compress the MP4 to save storage space, or add AI subtitles to make the content more accessible. Need to go in the other direction? Our video converter handles any format combination.
How to Convert MKV to MP4
Upload Your MKV File
Drag and drop your MKV file — we handle all common codecs including H.264, H.265, VP9, and more.
Smart Conversion
If the MKV video stream is already H.264, we remux directly to MP4 — nearly instant with no loss when the codec is compatible. For other codecs, we re-encode with optimized H.264 settings that preserve visual fidelity at a smaller file size.
Download Your MP4
Your universal MP4 is ready quickly. Stream it on any device, upload to YouTube, or continue editing. Want subtitles? Generate them with AI or convert an existing subtitle file to match.
Why Convert MKV to MP4?
Keep Quality
MKV to MP4 conversion with minimal re-encoding. Your video looks identical.
Play on Any Device
MKV doesn't work on most phones and TVs. MP4 plays everywhere.
Smaller Files
MP4 container is more efficient. Same quality, smaller file size.
Fast Conversion
Server-side processing handles large MKV files quickly.
COMPATIBILITY WITHOUT COMPROMISE
Smart TV and Streaming
Most smart TVs and streaming devices reject MKV files. Convert to MP4 and stream directly via USB, DLNA, or Plex. Quality is preserved up to your plan's maximum, especially with H.264 remuxing. Compress the result if storage is limited on your device.
Mobile Playback
iPhones and many Android phones struggle with MKV playback. Converting to MP4 means your videos play natively in the default media app without third-party players. After conversion, add subtitles for watching in noisy environments.
Video Editing Workflows
Most video editors prefer MP4 over MKV for timeline imports. Convert your source files before editing to avoid codec issues and rendering delays. Our converter also handles MOV, AVI, and WebM if your editor has specific requirements.
Related Tools
MKV to MP4 — FAQ
What's the difference between MKV and MP4?
Both are container formats. MKV supports more features (multiple audio/subtitle tracks) but MP4 has universal device support.
Will subtitles be preserved?
The converter keeps the video and ONE audio track; separate subtitle tracks are not carried over. For subtitles, use our subtitle tool.
Is MKV to MP4 conversion fast?
Yes, when the video codec is already H.264, we can remux without re-encoding — nearly instant.
What about multiple audio tracks?
The primary audio track is preserved. MP4 supports one audio track per file.
What's the maximum file size?
Files can be up to 2 GB.
Can I convert 4K MKV files?
Yes, we accept every resolution, 4K included. The output MP4 keeps your file's resolution. With Pro, quality can go up to Full HD (1080p), and up to 4K Ultra HD (2160p) with Studio, if the original video allows it.
What happens to multiple audio tracks in my MKV?
No — separate MKV subtitle tracks are not carried into the MP4. To add subtitles, burn them in with our subtitle tool.
Will subtitle tracks from the MKV be included?
An MKV can hold several audio tracks, but the converter keeps only the FIRST one. Select the track you want before converting if needed.
Is remuxing really lossless?
Yes. Remuxing simply repackages the video and audio streams into an MP4 container without any re-encoding. The bitstream is identical, meaning no loss when the codec is compatible and near-instant processing.
Convert your MKV to MP4 now
Free, fast, plays on every device.
No credit card required
MKV Quality, MP4 Compatibility
Get the best of both worlds. Klipa converts your MKV files to universally playable MP4 with no loss when the codec is compatible when remuxing is possible. No software to install, and your first try needs no signup. Combine with our compressor, AI subtitles, and subtitle converter for a seamless media workflow.
