MP4 to FLV Converter

Convert MP4 to FLV Online for Free

How to Convert MP4 to FLV?

AhaConvert makes it easy to convert MP4 videos to FLV format right in your browser. FLV is a lightweight file format. It was once the standard for online video streaming and web playback. Today, it’s still used for embedding videos on older websites, servers, and applications with Flash-based players. You don’t have to install software or register an account to use AhaConvert. It works smoothly on Windows, Mac, Android, and iPhone. Follow the steps below to convert your MP4 to FLV now!

Upload MP4 Video

Upload your MP4 video file from a local device or a URL.

Choose FLV Format

Select FLV as the target video format.

Download FLV File

Download and save the FLV video file once the conversion is complete.

Supported Video Converters

FLV converters

Apart from MP4, AhaConvert supports transforming various other video and audio formats to FLV. Browse the specific FLV converters listed below.

MOV to FLV

AVI to FLV

SWF to FLV

MKV to FLV

Video to FLV

WMV to FLV

GIF to FLV

3GP to FLV

WebM to FLV

M4V to FLV

MPG to FLV

TS to FLV

VOB to FLV

DV to FLV

3G2 to FLV

MTS to FLV

MXF to FLV

M2TS to FLV

OGG to FLV

RM to FLV

RMVB to FLV

MOD to FLV

DVR to FLV

WTV to FLV

MP4 converters

Besides converting MP4 to FLV, AhaConvert also supports MP4 conversion to many other video formats. Check out the MP4 to video converters listed below.

MP4 to MP3

MP4 to GIF

MP4 to WAV

MP4 to MOV

MP4 to WebM

MP4 to Video

MP4 to AVI

MP4 to WMV

MP4 to OGG

MP4 to MKV

MP4 to M4A

MP4 to Audio

MP4 to 3GP

MP4 to MPG

MP4 to FLAC

MP4 to M4V

MP4 to VOB

MP4 to AAC

MP4 to OPUS

MP4 to MP2

MP4 to TS

MP4 to M4R

MP4 to SWF

MP4 to WMA

MP4 to AIFF

MP4 to MXF

MP4 to AMR

MP4 to RMVB

MP4 to 3G2

MP4 to M4B

MP4 to M2TS

MP4 to DVR

MP4 to ALAC

MP4 to RM

MP4 to DV

MP4 to MOD

MP4 to WTV

MP4 to AIF

MP4 to OGA

MP4 to CAF

MP4 to MTS

MP4 to 3GA

MP4 to AIFC

Frequently Asked Questions

You should convert MP4 to FLV when you need your video to be played on older websites and programs that are still using Flash players. Lots of old video platforms, servers, and learning systems were built for .flv files, not .mp4. Therefore, FLV is still a useful format if you’re updating old content, restoring a legacy site, or need fast-loading videos for slow internet.

The converted FLV files can be opened on most computers with free players, such as VLC, KMPlayer, or PotPlayer. These programs work on Windows, Mac, and Linux without Flash. If you wish to play the FLV video online, you should embed it in an older Flash-compatible website or upload it to a platform that still provides FLV playback. For the latest browsers, FLV is no longer compatible. Offline players are the easiest option.

Yes, in many cases. The FLV format was designed for web streaming at a time when internet speeds were much slower. It starts playing before the full file is downloaded, so it usually loads fast even with weak connections. On the other hand, MP4 provides higher quality at smaller sizes, but it’s optimized for modern browsers and networks. Therefore, when you have a slow internet connection, FLV videos will typically play more smoothly.

A little bit. FLV uses older compression technology, so the picture and sound may lose a little detail during the conversion. Many people will not observe the difference unless they compare them closely. So if your MP4 is in HD or higher, the converted FLV video might appear a bit softer or less sharp, but it will play fine. AhaConvert will automatically adjust the settings to keep good quality while keeping the file size smaller for easy playback.

Yes. AhaConvert lets you convert MP4 to FLV completely free in your browser. There is no signup, no subscription, and no hidden watermarks for simple conversions. Just upload your MP4 file and download the FLV version once it’s ready. That’s it.

Yes, but only videos up to 1 GB in size. We set this limit to keep the upload speed stable for every user. Files larger than 1 GB can take a very long time to upload and may fail if the internet connection is slow. Therefore, if your video is bigger, please trim or compress it first. Our converter will still process the full video as long as it’s under the limit.

For now, AhaConvert does one file at a time to maintain the speed and stability of the tool. If you wish to convert several videos, you will have to do them individually. If this is something you need to do often, let us know. We will consider adding this feature in a future update.

Absolutely. All the video files, whether uploaded or downloaded, are kept safe during processing. We use 256-bit SSL encryption, store files in a secure cloud environment, and automatically delete them within 24 hours.

Explore More File Converters

File convert tools

Unable to find the format you need? AhaConvert also provides these free online file converters:

Video Format

Image Format

Audio Format

Document Format

Security and Privacy

At AhaConvert, your files are protected with enterprise-grade security. We use 256-bit SSL encryption during transfer, store your data in a secure cloud environment, and guarantee automatic deletion within 24 hours. We fully respect your privacy – we will not view or share your files under any circumstances. Make sure your files are protected at every step, from upload to conversion.

SSL encrypted transmission

Automatically deleted within 24 hours

Privacy protection

Secure cloud storage