Convert anything, at global scale.
200+ formats and automation APIs that feels instant.
CONVERT
From
To
Drop files or choose a source
Upload multiple files at once, mix formats, and fine-tune every conversion with format-aware settings.
Max 2GB per file · Drag & drop ready · Mixed file types welcome
X3F at a glance
X3F
Sigma raw support is closely tied to the company's Foveon sensor story, giving X3F a reputation and workflow profile that differ from more mainstream Bayer-centric raw ecosystems.
MKV at a glance
MKV
Matroska developed a strong reputation in enthusiast and archiving communities before later being formalized through IETF standardization.
Format comparison
| Feature | X3F | MKV |
|---|---|---|
| File type | Image | Video |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2002 | 2002 |
| Inventor | Sigma (Foveon) | Matroska |
| Status | proprietary | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Camera raw data | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Supported |
When to use each format
When to use X3F
- Your source file is already in X3F.
- Preserve source expectations before exporting to MKV.
- X3F is commonly used in image workflows.
When to use MKV
- Your target workflow expects MKV.
- Improve delivery compatibility with MKV.
- MKV is commonly used in video workflows.
FAQs
Why convert X3F to MKV?
Convert to MKV when you need multiple tracks, subtitle support, chaptering, or less common codec combinations in a single container.
It is ideal for archival masters, media-library organisation, multilingual releases, and technical video handoff.
For mainstream web playback and easiest consumer sharing, MP4 is usually simpler.
What changes when converting X3F to MKV?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to MKV removes camera raw data. Moving to MKV adds streaming delivery.
What should I review after converting X3F to MKV?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.