FLV to MP4 Converter (.flv to .mp4)

Convert Flash Video Container (.flv) files to MPEG-4 Part 14 Video Container (.mp4) directly on your device. FLV is commonly used for converting archived rtmp live streams and legacy `.flv` files into modern `.mp4`, while MP4 is ideal for web video streaming, social media uploads, screen recordings, and extracting audio tracks to mp3/wav. Every conversion runs locally in your browser with zero server uploads.

100% On-Device Processing • Files Never Leave Your Browser (0 KB Uploaded)

Why Convert FLV to MP4 Locally?

Remux multi-gigabyte stream archives locally on your drive. Unlike cloud converters that upload your .flv files to remote servers, Artoons processes your files directly on your device.

How to Convert FLV to MP4

  1. Download the free Artoons Desktop App to enable the native FLV conversion engine.
  2. Drop your .flv files or folders into the queue and select MP4 (.mp4).
  3. Click Convert to save your .mp4 files locally with no file size limits.

Frequently Asked Questions

Do my FLV files ever get uploaded anywhere?

Never — 100% of the conversion runs locally inside your own device memory with 0 KB sent over the network.

Will FLV to MP4 look or sound worse?

Both FLV and MP4 keep crisp detail when swapped locally on your own hardware. You can also tweak output quality in Preferences anytime.

How big of a .flv file can I convert here?

Converted at full speed with zero size limits using the free Artoons Desktop App.

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