mp4 to flv Converter

Convert your Audio, Video and other Files from one format to another online for free!

Or drop files here. Max file size 1GB.

Choose a file before converting.

mp4

The MPEG-4 Part 14 format, better known as MP4, is a multimedia container used to store digital audio and video. It can store other kinds of data, like still images and subtitles.

flv

Popularly known as FLV, Flash Video is a multimedia container format developed by Adobe Systems. Its primary focus was to deliver video over the Internet.

It can contain audio, video, and text. It was released in 2003.

Frequently Asked Questions

Is it safe to convert MP4 to FLV files?

While converting an MP4 file to the FLV format, the main concern is security. Sometimes the MP4 file may be some of your clips. So you may get insecure about the misuse of your data.

It would help if you were cautious while using an online converter. Only use trusted software.

Convertr.org is a reliable website where you can convert videos into any format without miss-handling your personal data. This website is totally safe and secure, and it doesn't store the user’s data after conversion.

Can Windows 10 convert MP4 to FLV files?

Although the Windows 10 devices can play MP4, it cannot convert the video format to others.

You need to use a trusted online converter for that purpose. Convertr.org is a great platform to convert files easily without any hassle. Upload a file on the website and it will do the task for you.

Why do I need to convert from MP4 to FLV?

There are many reasons why you would want to convert MP4 to FLV.

  • MP4 files can be used for streaming but the format is not better than FLV for video playback on the Web.
  • FLV has more features than MP4. If you need to add animation to a video, converting MP4 to FLV can be useful.
  • FLV files are smaller than MP4.

Which is the best MP4 to FLV Converter?

When choosing the best MP4 to FLV converter, the best option is Convertr.org. It's an excellent online tool that lets you convert any MP4 file into FLV format in no time.

Its user interface has straightforward features which allow anyone to do the task efficiently. You don't need to be a pro in video editing to use our tool.

Convertr.org offers you a safe, secure, and lightning-fast speed file conversion.

How can I convert MP4 to FLV faster?

A quick search will show you many sites offering to convert your videos. However, the most important thing is finding a website that can provide effortless conversions for free.

Convertr.org is an amazing website for the conversion of your files. Having several formats to choose from, you can convert any file in no time for free.

How to Convert MP4 Files to FLV?

Converting MP4 to FLV multimedia files is something you can easily do at Convertr. Our site counts with a user-friendly interface that everyone can know how to use by practically just looking at it. That way, those with limited computing knowledge can perform file conversions by themselves without any help.

  1. Click on the "Choose files" button and select the files you want to convert, or simply drag and drop them directly on the site.
  2. Select FLV as the output format.
  3. Click on convert

And that's it. Your file will automatically be uploaded, and we will convert it to FLV format as quickly as possible. Then, you have to download it already converted.

For example, if you are trying to convert several gigabytes of MP4 content to FLV, it is normal to take some time.

Please note that the conversion will take less or more time, depending on the length of the file.


What happens when MP4 becomes FLV

Source format

MP4 is a widely supported media container, commonly carrying H.264 or H.265 video and AAC audio.

Target format

FLV is a legacy web video container with limited support in modern browsers and devices.

What changes

The MP4 container is read and the selected video and audio streams are written into a FLV container.

Codecs may be transcoded even when the visible resolution and duration stay the same.

What is preserved
Duration, frame order, and visible dimensions are preserved unless you select trimming, frame-rate, or resolution changes.
What may be lost
Extra subtitle, attachment, chapter, or alternate audio tracks may be omitted when the target container or selected settings do not support them.
Codec and quality implications
Container names do not guarantee a codec. Quality and compatibility depend on the selected video codec, audio codec, bitrate, frame rate, and resolution.
Realistic limitations
A valid MP4 extension does not guarantee that every codec inside the container is decodable. Corrupt, encrypted, or unusual streams can fail.

Conversion steps

  1. Upload a MP4 file no larger than 1 GB.
  2. Confirm that FLV is selected as the target.
  3. Open settings only if you need to change codec, quality, bitrate, frame rate, resolution, or audio behavior.
  4. Start the conversion. A healthy compatible worker begins processing immediately.
  5. Download the FLV file and check the result before deleting your source.

Troubleshooting

The MP4 file is rejected or will not open.
Confirm that the file is not empty, password-protected, or corrupt and that its real format matches the extension.
The FLV file is larger than expected.
Choose a more efficient codec or lower quality setting when available. Lossless and uncompressed targets are often larger by design.
The result has no sound or will not play.
Try a broadly supported target codec and verify that the source contains a decodable audio stream.

Privacy and file retention

Uploads and converted files are processed automatically and irreversibly deleted within 24 hours. You can delete them sooner with the delete control. Convertr does not read, mine, sell, or manually review file contents.

Read the privacy policy

Useful alternatives

MP4 to AAC Use this when AAC better matches the app, codec, or editing workflow you need. MP4 to AIFF Use this when AIFF better matches the app, codec, or editing workflow you need. FLV to MP4 Use the reverse conversion when you need to return to the original format family.