Video tool
Convert MP4 Video to FLV on Your Device
Make a FLV version of an MP4 in your browser for legacy Flash players, archives, and publishing systems. The source video stays on your device.
- Runs in your browser
- Private processing
- No install
- Files stay on device
Route MP4 → FLV
or drop here · up to 500 MB
Preview (optional)
When your browser supports it, your video appears here. If preview does not load, you can still convert your file normally.
Preview is not available for this file
No worries — your video can still be converted. Set your file name and click Convert when you are ready.
Quick use cases
- Prepare a playback copy for an older Flash-based platform
- Meet a delivery specification that lists FLV
- Test an MP4 asset in a FLV-compatible playback setup
Workflow
- Upload the MP4 video
- Choose a name for the FLV output
- Convert the video to FLV
- Download the FLV file and verify it
Processing notes
- Conversion uses your device processor and keeps the source file local.
- Large or high-resolution MP4 files need more memory to encode as FLV.
- Keeping the tab active can help a long conversion complete reliably.
Compatibility notes
- FLV is suited to legacy Flash players, archives, and publishing systems.
- Current browsers may require a separate player to open FLV.
- Confirm the destination accepts FLV, not just the codec used by the MP4.
Troubleshooting
- Conversion slow? Close processor-heavy apps or test a shorter section first.
- FLV will not open? Try a player built for FLV and inspect the required codecs.
- Delivery rejected? Compare the file's codec, resolution, and audio settings with the FLV specification.
MP4 to FLV converter FAQ
Why convert MP4 to FLV?
Convert when a player, editor, archive, or delivery system explicitly requires FLV instead of MP4.
Does the MP4 leave my device?
No. The conversion runs locally on your device rather than sending the source video to a processing server.
How do I verify the FLV output?
Open it in the destination player or editor, then check picture, sound, duration, and synchronization before delivery.