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
MKV at a glance
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.
FITS at a glance
FITS
Convert to FITS when preserving scientific image data, observation metadata, or instrument-derived captures for astronomy and research workflows.
It is the right target when measurement context matters as much as the picture itself.
Format comparison
| Feature | MKV | FITS |
|---|---|---|
| File type | Video | Image |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | large | medium |
| Compatibility | moderate | broad |
| Editability | limited | moderate |
| Created year | 2002 | 1981 |
| Inventor | Matroska | NASA / astronomical data community |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | delivery |
| Layer support | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Supported | Not supported |
When to use each format
When to use MKV
- editing
- mastering
- streaming delivery
- Very flexible track, subtitle, and attachment handling.
When to use FITS
- capture ingest
- editing
- web or print delivery
- Strong fit for scientific metadata-rich imaging.
FAQs
Why convert MKV to FITS?
Convert to FITS when preserving scientific image data, observation metadata, or instrument-derived captures for astronomy and research workflows.
It is the right target when measurement context matters as much as the picture itself.
What changes when converting MKV to FITS?
This conversion changes how the format behaves in downstream tools and delivery environments.
Size profile changes from large in MKV to medium in FITS. Editability profile changes from limited in MKV to moderate in FITS. Compatibility profile changes from moderate in MKV to broad in FITS.
Moving to FITS removes streaming delivery.
What should I review after converting MKV to FITS?
Check the exported file for Not designed as a mainstream consumer image format.; Validation needs domain-aware tools, not just generic viewers..