MPG Won't Open? Convert to MKV Instantly
Fast, instant MPG to MKV conversion. No signup required. Just drop your .mpg file and get .mkv in seconds.
Batch Settings
About MPG to MKV Conversion
Dealing with a MPG file that won't open on your device? You're not alone — MPG compatibility issues are one of the most common reasons people search for a file converter. MPG is a widely used file format.
The fix is simple: convert your MPG to MKV. MKV (Matroska) is an open container supporting virtually any codec, multiple audio tracks, and subtitles. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting MPG to MKV maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your MPG file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a MKV file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert MPG to MKV
- 1
Add your MPG file
Drag and drop your .mpg file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick MKV output
Select .mkv as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The video engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .mkv file. For batch jobs, download all at once as a zip.
What Happens When You Convert MPG to MKV
Your MPG file is decoded and re-encoded as MKV.
Your MPG file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in MKV format
The converted file is ready for download
Format Comparison
MPG
.mpg file
| Extension | .mpg |
| MIME Type | video/mpeg |
| Category | Video |
MKV
.mkv file
| Extension | .mkv |
| MIME Type | video/x-matroska |
| Category | Video |
Should You Convert MPG to MKV?
When to Convert
- ✓When you need a MKV file
Frequently Asked Questions
Why won't my MPG file open?
MPG files may not open if your device lacks the right codec or application. Converting to MKV — a more widely supported format — usually resolves this. MKV (Matroska) is an open container supporting virtually any codec, multiple audio tracks, and subtitles.
Is it safe to convert MPG to MKV online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting MPG to MKV?
Converting MPG to MKV maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my MPG file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert MPG to MKV on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.