Convert FLV to MP4 in Seconds — 100% Free
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Step 1: Choose your FLV file and upload it.
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Step 2: We convert your video to MP4 on our servers.
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Step 3: Download your MP4 and play it anywhere.
What to expect when converting FLV to MP4
Real numbers from every conversion on this tool since 24 October 2026. Nothing here is estimated: we record how long each job took and how large the files were. File names and contents are never stored.
Expected time by file size
How long conversions take
share of all conversions
- under 1 s32%
- 1–10 s55%
- 10–60 s7%
- 1–5 min7%
- over 5 min0%
Times are server processing only, measured after the upload finished; upload and download are not included. Large files take longer, but the limit is the same for everyone: no account, no queue priority to buy. Updated 2026-11-03
Why use Converter App for FLV to MP4?
FLV belongs to an earlier web era, which is why many apps refuse to play it today. This converter turns FLV into MP4 so your video opens on phones, laptops, smart TVs, and editing software without extra codecs. It is free, there are no usage caps within fair use, and big uploads are welcome, which helps if you are working with long recordings.
Upload an FLV above and the conversion starts right away. Most files finish quickly. Once the progress bar completes, download the MP4 and you are done.
How we keep quality while reducing size
Our FLV to MP4 converter picks settings that keep the picture close to the original. We choose a bitrate that preserves detail without blowing up the file size. Videos with a low resultion usually look better at their native size than upscaled being up-scaled. Our tool is taking this effect into account.
Can you still open FLV files?
FLV isn’t widely supported anymore, since it is deprecated. The easiest fix is to convert to MP4. If you just want a quick look at the original, VLC opens it on Windows. If you are on macOS or Linux, players like MPV or FFplay usually should do the job.