MP4 vs FLV
MP4 is the modern standard for video delivery, while FLV is mainly a legacy web video format from older Flash-era workflows. Today the comparison is mostly about current relevance versus old archive compatibility.
What is MP4?
MP4 is the all-purpose video format used across modern apps, devices, and websites.
- Modern standard
- Excellent compatibility
- Great sharing support
What is FLV?
FLV is an older web video format from Flash-based delivery systems and legacy online media.
- Legacy web video
- Archive migration use
- Outdated for most modern workflows
MP4 vs FLV: key differences
What matters most here
Left format has the edge overall.
Choose MP4 when its strengths match your workflow. Choose FLV when portability, compatibility, editing fit, compression, or delivery needs point the other way.
When to use MP4
Use MP4 for nearly all modern delivery, playback, upload, and cross-platform video tasks.
When to use FLV
Use FLV only when you specifically need to preserve or handle old Flash-era media.
How to choose between MP4 and FLV
The best format is often the one that fits where your file is going next: a browser, a phone, an editor, a web page, or a backup.
Most comparisons come down to size versus quality, editing flexibility versus portability, or modern efficiency versus broader compatibility.
If the original file already fits the workflow, keep it. Convert when you need a better match for compatibility or delivery.
Convert between MP4 and FLV
Once you know which format suits your workflow better, you can convert in either direction or open the related format guides for more context before deciding.