Video ToolsFree

FLV to MP4

Convert old Flash FLV video files to MP4 format. Adobe Flash Player was discontinued in December 2020 — FLV files no longer play in browsers. Convert your FLV archive to MP4 for lasting playback on any modern device. No signup required.

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MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB

Ctrl+Vto paste a copied file

Frequently Asked Questions

Why can't I play FLV files anymore?▼
Adobe Flash Player was officially discontinued on December 31, 2020. All major browsers removed Flash support. FLV files require Flash Player to play, so they no longer work in Chrome, Firefox, Safari, or Edge.
Is video quality preserved converting FLV to MP4?▼
Yes. The video content is preserved during conversion. FLV typically uses H.263 or H.264 video with MP3 or AAC audio — all standard codecs that transfer cleanly to MP4.
Will the audio be preserved?▼
Yes. FLV audio (MP3 or AAC) is preserved in the MP4 output.
What about old YouTube FLV downloads?▼
FLV files downloaded from old YouTube videos (pre-2010) convert well. Most contain H.264 video and AAC audio.
Is the conversion done in the browser?▼
Yes. FFmpeg WebAssembly handles FLV to MP4 conversion locally. No file is uploaded.