Convert FLV to MP4
Free and instant — your FLV files are processed securely on our servers and deleted right after conversion. Nothing is stored.
How to convert FLV to MP4
- Step 01
Add your FLV files
Drop them into the box above or click to browse. You can add several files at once.
- Step 02
Conversion starts instantly
Your file is sent to our servers, converted and deleted right away — no sign-up, no queue, no waiting.
- Step 03
Download your MP4 files
Save each file individually or grab them all at once. Done.
Why convert FLV to MP4?
Adobe Flash Player was discontinued in 2020, so old FLV files no longer play in any browser or on any modern device. Converting to MP4 brings your video back to life, playable everywhere.
FLV vs MP4 at a glance
FLV is the video format that powered early YouTube and web video — Adobe Flash Player was discontinued in 2020, so FLV files no longer play in any current browser. MP4 is the universal video format — plays on every device, browser and platform without extra codecs.
| Property | FLV | MP4 |
|---|---|---|
| Extension | .flv | .mp4 |
| Full name | Flash Video | MPEG-4 Part 14 |
| First released | 2002 | 2001 |
| Developed by | Macromedia (Adobe) | ISO/IEC JTC 1 |
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | No | No |
| Best for | old Flash-based web video — no modern browser or device plays it natively anymore | video sharing, streaming and playback on any device |
FLV to MP4 — frequently asked questions
Is this FLV to MP4 converter really free?
Yes — completely free, with no sign-up, no watermarks and no daily limits.
Will I lose quality converting to MP4?
MP4 uses lossy compression, so the image is re-encoded at high quality (92%). For photos the difference is practically invisible; for text-heavy graphics or logos, a lossless format like PNG preserves sharp edges better.
Why won't my FLV file play anymore?
Adobe Flash Player was discontinued in December 2020 and removed from every major browser. Converting to MP4 lets you play the video again on any current device.
Is the conversion private?
Video conversion runs on our servers with ffmpeg — your file is deleted immediately and never stored.