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Convert MKV to MP4 Online — Free MKV toMP4Converter
Convert MKV videos to MP4 for universal playback. Free, no software.
This tool is being improved
Explore other toolsDaily limit reached
Fetching a video from a link can take longer than uploading a file — up to a minute or two for a long video.
Your file is kept — processing resumes automatically.
This limit resets tomorrow. Go Pro to never hit it again, on every tool.
Your file is kept: processing resumes where it stopped.
Your file is kept: processing resumes where it stopped.
One job at a time. Yours finishes, then this one starts.
Drop to upload
Drop your file here
Or use the other entry, it stays available.
MP4, MOV, AVI, MKV, WebM
Free to try · no account required
Free to try · no account required
Drop to upload
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Timings preserved
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Duration
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Free to try · no account required
Free to try · no account required
Quota is based on full video duration. Queued and running tasks are included; the exact balance is checked before transfer.
COMPATIBLE PLATFORMS
Your Hashtags Are Ready!
Hashtags copied to clipboard — paste them in your post!
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Conversion Complete!
Preview below. Download your file whenever you like.
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Translation Complete!
Preview below. Download your file whenever you like. Timecodes are preserved.
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Pick two different languages to start dubbing.
The sample plays in the target language so you can compare before starting.
Keep original voice underneath
Low volume, behind the translated voice.
Your Video Script
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Your video is received and saved. It will start as soon as a machine frees up.
It's ready
This stage works through the video end to end. The percentage will only move once it's done.
This is the longest stage of the job. It is moving, even when the number isn't.
Cancel now? The work already done will be lost and the file will have to be uploaded again.
Get an email the moment it's ready.
Klipa is preparing your preview
Your best clip is being cut and auto-reframed (face tracking). This preparation happens only once — about 30 seconds.
Upgrade to generate your clips with this style, or continue free with the Minimal style.
Burning in the captions…
Klipa is burning your captions into this clip, in the style you chose — identical to the preview. This takes a moment, keep the page open.
The burn failed — nothing was lost, you can retry.
This file is no longer available
Keep your videos between sessions and get free credits for your next exports.
Preparing your logo-free video… The download will start on its own.
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Convert THIS video in full · up to 2 GB / 2 h · one-off
File expired
Relaunch burningClean file, no watermark.
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Monthly limit reached
Your free plan hit its burn limit this month. Your settings are saved — unlock this result or go Pro to burn now.
Subtitle workshop
Your subtitled video is readyFree download stays available below: the videos will carry the Klipa logo in the center and bottom.
We're preparing your logo-free videos…
We couldn't prepare your logo-free videos. Write to us — your purchase is safely recorded.
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Your video is ready
Download the full video, in full quality
Find all your videos, wherever you are
Longer videos and larger files with Pro.
Your original video is still available. Try another tool:
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Your downloads have used your allowance, and this video needs more. The Downloads plan opens 100 hours of video per month — enough to stop counting altogether.
- 100 hours per month — 12× your current allowance
- HD and 4K, without paying video by video
- Every platform, no app and no ads
No commitment — cancel in one click, any time.
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. Up to 500 MB without an account, 1 GB with a free account, 2 GB on Pro (2 GB on Studio). The tool automatically detects whether remuxing or re-encoding is needed.
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. The original quality is preserved, 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?
The limit depends on your plan: 500 MB without an account, more with a free account, up to 2 GB on Pro.
Can I convert 4K MKV files?
Yes, we support all resolutions including 4K. The output MP4 keeps your source file's resolution.
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.
What Creators Say
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, no signup required. Combine with our compressor, AI subtitles, and subtitle converter for a seamless media workflow.
