Select your FLV file
Choose an FLV video from your computer, phone, or tablet, or drag it into the upload area.
Fast online video tool
FLV to MP4 Converter
Convert an FLV video to the widely supported MP4 format directly in your browser. No account needed; conversion runs in your browser when supported.
Drop your FLV video here
or choose a file from your device
Preparing converter...0%
Browser-based privacy
No watermark
No signup
How to Convert FLV to MP4
Turn your video into an MP4 file in three straightforward steps.
Start the conversion
Click “Convert to MP4.” The tool processes your video locally and shows real-time progress.
Download the MP4
Your converted MP4 downloads automatically and is ready to play, edit, or share.
A Private and Practical FLV Converter
FLV is an Adobe Flash video container that is no longer accepted by many modern players and platforms. MP4 offers much broader compatibility across browsers, phones, smart TVs, editing applications, and social media services.
This FLV to MP4 converter runs inside your web browser. Your source video stays on your device, which makes the process more private than traditional upload-based converters.
- Works in supported modern browsers when the video engine loads
- Creates a standard MP4 video without adding a watermark
- No registration, email address, or software installation required
FLV
MP4
Why Use This FLV to MP4 Converter?
Designed for a clean experience without unnecessary steps or confusing controls.
Browser-based processing
Conversion happens locally. Your video is not transferred to our server for processing.
Simple workflow
Select a file, start conversion, and download. There are no complicated settings to manage.
Broad compatibility
MP4 is supported by most modern devices, websites, media players, and video editors.
Frequently Asked Questions
Helpful answers about FLV files and MP4 conversion.
What is an FLV file?
FLV is an Adobe Flash Video container that can contain older video codecs as well as H.264 in some files. Compatibility varies by file.
Is this FLV to MP4 converter free?
Yes. You can use the converter without creating an account, paying a fee, or accepting a watermark on the output video.
Are my videos uploaded to a server?
No. The video is processed inside your browser and remains on your device. Closing or refreshing the tab clears the current conversion session.
Will converting FLV to MP4 reduce quality?
The converter first attempts a stream copy. If codecs are not compatible and browser FFmpeg supports the necessary encoders, it tries H.264/AAC re-encoding.
Why can a large video take longer?
Processing speed depends on the file size, codec, device performance, available memory, and browser. Keep the tab open until the MP4 download begins.
Which devices support the converter?
A modern desktop browser is recommended. Codec support and memory limits depend on the FFmpeg WebAssembly build and browser.