M3U8 to MP4 / Video Converter
Convert any M3U8 stream to MP4, MKV, WEBM right in your browser
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Free Online M3U8 to MP4 Converter — Powered by ffmpeg.wasm in Browser
Convert M3U8 streams, TS files, or any supported media to MP4, MKV, or WEBM entirely in your browser using the industry-standard ffmpeg.wasm. No uploads, no waiting for server queues, complete privacy. Supports remux (fast) and re-encode modes. Automatically falls back to mux.js when SharedArrayBuffer is unavailable. Ideal for developers, editors, and users who need quick local conversions.
How to Convert M3U8 to MP4
Either paste a direct media URL (TS or MP4 segment list) or upload a local TS/MP4 file.
Choose output format (MP4 recommended for compatibility) and quality preset (Original/Remux is fastest).
For large files (>500MB), enable Large File Mode for chunked processing.
Click Convert. ffmpeg.wasm runs locally — watch real-time progress.
The converted file downloads automatically when complete. No data ever leaves your computer.
M3U8 Converter FAQ
Why is browser conversion slower than desktop ffmpeg?
ffmpeg.wasm runs in WebAssembly inside the browser sandbox. It is single-threaded in most configurations and has memory constraints. For best speed, use 'Original (remux)' mode when your input codecs are already compatible with the output container. Re-encoding is slower but gives more control over quality.
What is Large File Mode and when should I use it?
Large File Mode uses WORKERFS or chunked memory strategies to handle files over ~500MB without crashing the browser tab. Enable it for long VODs or high-bitrate streams. It trades some speed for stability.
What happens if my browser doesn't support SharedArrayBuffer?
The converter gracefully falls back to mux.js for simple TS→MP4 remuxing. Full ffmpeg.wasm features (re-encoding, other formats like MKV/WEBM) require COOP/COEP headers, which are enabled on this page. Most modern browsers support it.
Which output formats are best supported?
MP4 has the widest compatibility across devices and players. MKV is excellent for preserving multiple audio/subtitle tracks. WEBM is optimized for web delivery with VP9/AV1. Choose based on your target use case.
Is my video file private during conversion?
Completely. The entire conversion happens in your browser using WebAssembly. No file is uploaded to our servers. This is one of the key advantages of our client-side approach over cloud conversion services.