FLV vs MKV
Which video format should you choose?
FLV wins on small file sizes. MKV wins on supports unlimited tracks and subtitles. For most general use, pick whichever is more compatible with your existing tools — file size and quality differences are usually small at the same encoding settings.
When to use FLV
Choose FLV when you need converting legacy flash content or recovering old web archives. Its strengths: small file sizes, and once-universal web compatibility.
Pros
- + Small file sizes
- + Once-universal web compatibility
Cons
- − Adobe Flash is deprecated
- − No modern browser support
- − Should be converted to MP4 or WebM
When to use MKV
Choose MKV when you need high-quality movie storage or multi-language video files. Its strengths: supports unlimited tracks and subtitles, and open source and royalty-free.
Pros
- + Supports unlimited tracks and subtitles
- + Open source and royalty-free
- + Excellent quality preservation
Cons
- − Not natively supported on iOS or Safari
- − Larger files than MP4
- − Limited streaming support
Side-by-side
| Aspect | FLV | MKV |
|---|---|---|
| Full name | Flash Video | Matroska Video |
| Extension | .flv | .mkv |
| MIME type | video/x-flv | video/x-matroska |
| Compression | Compressed | Compressed |
| File size | Small▲ | Large |
| Compatibility | Limited / legacy | Modern only▲ |
| Open source | No / partial | Yes |
| Best for | Converting legacy Flash content | High-quality movie storage |
▲ = generally favored on that aspect. Real-world results depend on encoder settings.
Convert between FLV and MKV
FLV vs MKV — Frequently Asked Questions
Is FLV better than MKV?
Is FLV better than MKV?
Neither is universally better — they serve different needs. FLV is stronger for converting legacy flash content, while MKV is stronger for high-quality movie storage. Pick based on what you're trying to do.
Can I convert FLV to MKV?
Can I convert FLV to MKV?
Yes — Zen Convert handles FLV to MKV conversion for free, directly in your browser. It also handles the reverse (MKV to FLV). No signup, no watermark.
Will I lose quality converting between FLV and MKV?
Will I lose quality converting between FLV and MKV?
Both FLV and MKV use lossy compression. Each conversion adds a small additional loss because the codec re-encodes the audio/video. For best quality, convert once and keep the result.
Which file is bigger : FLV or MKV?
Which file is bigger : FLV or MKV?
FLV files are usually smaller than MKV files at the same quality. The difference depends on encoder settings, but the trend is consistent across most content.
Which one is better supported on phones?
Which one is better supported on phones?
MKV has broader mobile support. Most phones (iPhone and Android) play it natively without extra apps.