FLV to MP4 Converter

Convert your Flash Video files to modern MP4 format for universal playback. Free and secure.

Drag and drop your FLV video here

Max file size 500MB. Free, no registration required.

How to Use

1

Upload your FLV file by clicking the upload area or drag and drop

2

Select your preferred output quality (high, medium, or low)

3

Click 'Convert' to transform your FLV to MP4 format

4

Download your converted MP4 video file

Why choose our converter?

Quality, speed, and security for all your conversions.

High-quality conversion

Precise file conversion without any loss of quality.

100% browser-based

Files never leave your device. All processing happens locally.

Works on all devices

Computer, tablet, or smartphone — any browser works.

Fast processing

Convert files in seconds with our optimized engine.

No registration

Start converting immediately. No sign-up needed.

Batch conversion

Convert multiple files at once to save time.

About This Tool

FLV (Flash Video) was the dominant video format on the web during the Flash era, used by platforms like early YouTube, Newgrounds, and countless websites. Since Adobe Flash has been discontinued and is no longer supported by modern browsers, FLV files can no longer be played natively on the web. Converting FLV to MP4 brings your old Flash videos into the modern era, making them playable on any device, browser, or media player. This is essential for preserving video archives from the Flash era. All processing happens directly in your browser using WebAssembly technology for complete privacy.

Frequently Asked Questions

How do I convert FLV to MP4?
Upload your FLV file, select your preferred quality setting, click 'Convert', and download your MP4 file. The entire conversion happens in your browser.
Why can't I play FLV files anymore?
FLV files relied on Adobe Flash Player, which was officially discontinued in December 2020. Modern browsers no longer support Flash, so FLV files cannot be played natively. Converting to MP4 is the best way to make them playable again.
Will I lose quality when converting FLV to MP4?
With the 'High' quality setting, quality loss is minimal. In many cases, the MP4 output will look identical to the original FLV since MP4 uses more efficient H.264 encoding.
Can I convert old YouTube downloads in FLV format?
Yes! Many early YouTube videos were downloaded in FLV format. You can convert these legacy FLV files to MP4 for modern playback on any device.
Are my videos secure during conversion?
Yes! All conversion happens locally in your browser using FFmpeg WebAssembly. Your videos are never uploaded to any server, ensuring complete privacy.

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