How do I convert OBS recordings (MKV) to MP4?
Upload your OBS .mkv file, click convert, and download the ready-to-edit MP4 output file.
Convert MKV to MP4
Convert Matroska MKV files into streamable MP4 format for any device.
Upload Video
Drop video hereChoose VideoUp to 100MB • MP4, MOV, WEBM, AVI
No signup•Secure processing•Auto-deleted after processing
Supported Input and Output
- Accepted input
- MKV video
- Output
- MP4 video
- Upload limit
- Up to 100 MB per video
- Controls
- Fixed MP4 output
What This Processing Changes
The Matroska source is converted to an MP4-compatible video and audio combination. Extra subtitle, chapter, attachment, or alternate-track data may not be retained.
How to Check the Result
- Play the MP4 in the intended browser or device.
- Check that both the video and audio track are present.
Limits and Troubleshooting
- Keep the original MKV when it contains subtitles or multiple tracks you may need later.
- An unusual source codec may be unavailable even though the MKV container itself is recognized.
Technical Format Comparison: MKV vs MP4
- Multi-Track Container vs Streamable MP4: MKV (Matroska) supports unlimited tracks, soft subtitles, and crash-resilient recording (used by OBS Studio). MP4 is optimized for web streaming and universal playback.
- OBS Capture Post-Processing: Screen recordings captured in OBS Studio as MKV must be converted to MP4 before uploading to social platforms or importing into mobile editors.
Frequently Asked Questions
Worked Example: Create an MP4 copy of a two-second container sample.
- Upload sample.mkv from the example below.
- Set Output format: mp4.
- Process and download; play the result from beginning to end.
Check Your Download
- Play the MP4 in the intended browser or device.
- Check that both the video and audio track are present.
Limit: Only this generated single-track sample is tested; subtitles, attachments, and alternate audio tracks may not be retained.
Download the example input and repeat the steps above. These are generated test files, not customer uploads.
- Input bytes
- 134,903
- Output bytes
- 134,859
- Verified result
- 640 × 360; 2.043 seconds; h264
- Test date
- 2026-10-06
Measurements apply to this sample and these settings. Other inputs and codec versions can produce different sizes and results.