ToolGPT

Convert FLV to MP4 just by asking

Attach your FLV file, type “Convert this to MP4”, and ToolGPT does the rest: it reads the video's details, picks the settings and converts it in your browser. You can ask for a smaller resolution or a lower bitrate in the same message.

  • Runs in your browser
  • No sign-in needed
Drop or choose your filesThe assistant opens with your files and does the rest.Choose Files
Things you can type
Open ToolGPTAttach a file and describe what you need.

More about the Video Converter →

How it works

  1. 1

    Attach the FLV

    Open ToolGPT and press the + button beside the message box, or drop the file into the chat. No account is needed to start.

  2. 2

    Ask for MP4

    Type what you need, such as “Convert this to MP4”. Add a resolution, frame rate or bitrate if you have a target in mind.

  3. 3

    Download the MP4

    The result appears as a card in the chat with a download button. Your FLV stays as it was.

Why convert FLV to MP4?

FLV was made for Flash Player, which browsers no longer run, so old downloads and stream recordings in FLV need converting before most devices will play them. Converting cannot add detail that a low-resolution FLV never had, so expect the MP4 to look the same, not sharper.

How ToolGPT converts FLV to MP4

The conversion runs in your browser. ToolGPT uses the browser's own video encoders where they can do the job and a WebAssembly build of FFmpeg where they cannot, so the video is not uploaded to a server to be converted. The assistant sees only the facts it needs to choose settings, such as the file's length, size and dimensions.

Because your own device does the work, a long or high-resolution video takes longer on an older computer or phone. A progress bar shows how far the job has got, and you can keep chatting while it runs.

About FLV

FLV, or Flash Video, is the container Adobe Flash Player used to stream video on websites. It usually carries H.264 or an older Flash codec, with MP3 or AAC sound. Since Flash was retired, browsers and most devices no longer play FLV, so old files usually need converting before anyone can watch them.

About MP4

MP4 is the standard MPEG-4 video container, used by phones, cameras, streaming sites and editing apps. It usually holds H.264 or HEVC video with AAC sound. Its strength is that it plays almost everywhere; its weakness is that the video is compressed with loss, so each re-encode costs a little quality.

Frequently asked questions

Is my FLV file uploaded?

No. The conversion runs in your browser. Your messages go to the AI assistant, but the video itself is processed on your device.

Can I change the resolution or the file size?

Yes. Ask in the same message, for example “Convert this to MP4 at 720p”. Without a request, ToolGPT keeps the video's own resolution.

Can I convert several FLV files at once?

Yes. Attach them together and ask for MP4. ToolGPT shows one plan for all of them with a Start button, and each file gets its own result.

Try it with your own file

Open ToolGPT, attach a file, and type what you want done.

Open ToolGPT

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