Rescue Flash Videos Into Modern MP4 Format
Flash is dead, but your FLV videos do not have to be. Millions of old tutorial videos, game recordings, and web clips were saved in FLV format during the Flash Player era. Convert them to MP4 before they become completely unplayable — modern browsers and devices have dropped FLV support entirely.
Why Convert FLV to MP4?
Adobe Flash Player reached end-of-life in December 2020, and no modern browser can play FLV files natively anymore.
Preserve valuable content — educational videos, early YouTube downloads, and Flash-based animations can be saved for the future in MP4.
FLV uses outdated codecs (Sorenson Spark, VP6) that no hardware decoder supports, causing choppy playback even in VLC.
Share legacy content on modern platforms — you cannot upload FLV to YouTube, Vimeo, or any social media platform.
FLV vs MP4 — Format Comparison
Flash Video (..flv)
MPEG-4 Part 14 Video (..mp4)
How to Convert FLV to MP4
Upload the Flash video
Find that old FLV file on your hard drive and upload it here. We support all FLV codec variants including Sorenson Spark, VP6, and H.264-in-FLV.
Modern codec re-encoding
The legacy video stream is decoded and re-encoded with H.264 for crisp, efficient playback. Audio is converted from MP3-in-FLV to standard AAC.
Bring your video back to life
Download the MP4 and enjoy smooth playback on any modern device. Your Flash-era content just got a new lease on life.
Frequently Asked Questions
I have hundreds of FLV files from old YouTube downloads — can I batch convert?
expand_more
You can upload and convert multiple files in sequence. For very large collections, our batch processing feature handles multiple conversions efficiently without you needing to babysit each one.
Will the video quality improve after conversion?
expand_more
The conversion cannot add detail that was not in the original. Many FLV files were encoded at low bitrates (360p was common). The MP4 will be the same resolution and visual quality, just in a modern, playable container.
Some of my FLV files contain Flash animations (SWF), not video. Can you convert those?
expand_more
This converter handles FLV (Flash Video) files specifically. SWF files contain interactive Flash content and require a different approach — they cannot be converted to MP4 with a standard video converter.
Why are my old FLV files such low resolution?
expand_more
FLV was popular during 2005-2012 when 360p and 480p were standard web video resolutions. The low resolution is baked into the source file and cannot be improved during conversion, though the video will scale smoothly on modern displays.
Pro Tips for FLV to MP4 Conversion
Back up your original FLV files before converting — once Flash support is gone, having the originals as an archive is wise.
If the FLV was originally 360p, do not upscale during conversion — it wastes file size without adding real detail.
For FLV files that already contain H.264 video internally, the conversion is essentially a container swap with minimal quality loss.
Related Conversions
Ready to Convert?
Upload your FLV file above and get your MP4 in seconds. Free, fast, and secure.