Free online H264 to FLV converter

Converting .h264 videos to .flv format.

Convert H264 to FLV online - free

.h264 .flv

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How to convert h264 to flv file

September 24, 2026
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Converting H.264 Encoded Video Files directly to Flash Video Files (.h264 to .flv conversion) should be possible and quite straightforward.

Use one of several video editing programs or (online) conversion tools, such as the Freemake Video Converter or Adapter, which allow users to import H264 videos and re-save them in FLV format.

This file conversion has been marked as obsolete. No dedicated converter or free online tool is available, or one of the formats is very old and has been replaced by newer versions, making this type of conversion unnecessary in modern usage.

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Understanding H264 and FLV file formats

The H264 format is a popular video compression standard known for its high-quality video output and efficient compression. It is widely used in various applications, including streaming, recording, and video conferencing. On the other hand, the FLV (Flash Video) format is a container file format used to deliver digital video content over the internet using Adobe Flash Player. Although its usage has declined with the advent of newer technologies, it is still used in some legacy systems.

How to convert H264 to FLV

Converting H264 to FLV involves changing the video file from one format to another while maintaining the video quality. This can be useful for compatibility with older systems or specific applications that require FLV format.

Best software for H264 to FLV conversion

One of the best software options for converting H264 to FLV is HandBrake. HandBrake is a free, open-source video transcoder that supports a wide range of formats. To convert using HandBrake, follow these steps:

Open HandBrake and click on File to import your H264 file.
Select the desired output format as FLV from the Format dropdown menu.
Adjust any additional settings as needed for your video.
Click Start to begin the conversion process.

Another excellent tool is FFmpeg, a command-line based software that is highly versatile and powerful for video conversions. Use the following command to convert H264 to FLV:

ffmpeg -i input.h264 -c:v flv output.flv

Both tools are reliable and efficient for converting H264 files to FLV format.

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H264 vs FLV: format comparison

How the H264 and FLV formats compare on the properties that matter most for this conversion.

Comparison of the H264 and FLV file formats
Property	.H264 H.264 video bitstream	.FLV Flash Video
Format type	Codec	Container
Compression	Lossy	Both
Maximum resolution	8K and above	4K
Audio tracks	None	One
Subtitles	Not supported	Embedded in the file
Streaming	Partial	Partial
Opens in a web browser	Partial	Partial
Typical file size	Small	Small
Open standard	Yes	Partly open
Introduced	2003	2002
Developer	ITU-T / ISO/IEC	Adobe Systems / Macromedia
MIME type	video/H264	video/x-flv

Open H264 file Open FLV file

Information about file extensions and file types is provided by File-Extensions.org

Frequently asked questions

Is the H264 to FLV converter free?

Yes, converting H264 to FLV on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.

How large can my H264 file be?

You can upload H264 files up to 30 MB and convert up to 1 files at once in a single batch. With a paid plan the limit is up to 2000 MB per file and 1 files at once, see our plans.

What happens to my uploaded files?

Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.

Do I need to install any software to convert H264 to FLV?

No. The H264 to FLV conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.

Did the conversion fail?

In most cases, the cause is an incorrect file format. Please upload a valid H264 file for this H264 to FLV conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.

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Additional formats for
h264 file conversion

Reverse conversion

flv to h264

Convert to flv from
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Free online H264 to FLV converter