Convert VOB to MKV Online
Turn VOB files into MKV output online. The service is free, requires no account, supports batch queues, and limits server uploads to 100 MB per file. The conversion runs on the server in an isolated request. Keep the original file while you review the converted copy.
Convert .VOB to .MKV
Select a file to begin. Processing details and limits are listed below.
How to convert VOB to MKV
- 1
Upload VOB files
Add one or more VOB files to the queue. The uploader keeps batch items separate.
- 2
Choose MKV settings
Set the available quality or format options, or keep the defaults for a first pass.
- 3
Run and save the result
Run the queue and download the MKV files individually or together as a ZIP.
DVD Video Object vs Matroska video
| Spec | DVD Video Object | Matroska video |
|---|---|---|
| MIME type | video/x-ms-vob | video/x-matroska |
| Format type | video | video |
| Standard | Pending review | Matroska specification |
| First release | Pending review | 2002 |
| Browser support | Pending review | Limited; most browsers do not play MKV natively |
| Contents | DVD video container. | Extensible container for video, audio, subtitles, chapters, and attachments. Common payloads include H.264, H.265, VP9, AV1, AAC, Opus, and FLAC. |
About DVD Video Object
DVD video container.
About Matroska video
Open container, excellent subtitle and chapter support, and the ability to hold almost any codec. Hardware and browser support is less consistent than MP4; some mobile and smart-TV apps cannot open it.
Format referenceWhy convert VOB to MKV?
- Compatibility is the main reason to convert when another person or service cannot open the source.
- The new format may support a feature the source container does not.
- The result can be reviewed without changing the file that other people still use.
- MKV is more appropriate for the target application, device, or delivery channel than VOB.
Will quality change?
The conversion standardizes the container and codecs for compatibility. It is a delivery step, not a lossless remux. Check a sample before processing a large batch.
Processing and limits
- Processing
- Server-side
- Engine
- FFmpeg
- Maximum size
- 100 MB per file on the server.
- Batch support
- Yes, multiple files can be queued; completed results can be downloaded as a ZIP.
- Quality controls
- Options can adjust output dimensions, audio bitrate.
The file is processed on the server because the conversion requires a server-side engine or a utility operation.
- Hardware and browser support is less consistent than MP4; some mobile and smart-TV apps cannot open it.
- Check metadata, dimensions, and compatibility after the conversion.
- Very large files can hit the 100 MB server limit before conversion starts.
Platform compatibility
MKV is a broadly supported target, including limited; most browsers do not play mkv natively. The source is VOB, which may have narrower support.
When not to convert
- Avoid repeated lossy conversions when quality matters; start from the highest-quality source available.
- If the file contains sensitive data, review the processing model before uploading it to a server.
- Do not convert when the original VOB must remain the only editable or archival copy.
Frequently asked questions
- How do I convert VOB to MKV online?
- Upload a VOB file, choose the available MKV options, run the conversion, and download the result. The tool is free, supports batches, and accepts server uploads up to 100 MB.
- Is Convert VOB to MKV free?
- It is free, requires no account, and adds no watermark. Server uploads are limited to 100 MB per file, and browser-first paths are limited by device memory.
- Does VOB to MKV conversion lose quality?
- The conversion standardizes the container and codecs for compatibility. It is a delivery step, not a lossless remux. Check a sample before processing a large batch.
- Is my VOB file uploaded?
- Yes. This conversion uses a server-side engine, so the file is uploaded over HTTPS, processed in an isolated request, and removed after the result is produced.
- Is batch conversion supported?
- Queue multiple files, run them together, and download the finished results as a ZIP. Each server file is limited to 100 MB, and large batches may take longer.
- What are the limitations?
- Open the downloaded MKV file in the application or database you plan to use, check the structure against the source, and keep the original until the output is approved.