Extract Audio from Video
Extract the audio track from any video file and save it as MP3, WAV, AAC, OGG, FLAC, or OPUS — all inside your browser. Powered by FFmpeg.wasm. Nothing is uploaded to any server.
Ready.
How to Use
Alfreto's Extract Audio tool lets you pull the audio track out of any video file — completely free, and entirely in your browser. Click Choose Video or drag and drop a video file into the upload area. Supported input formats include MP4, WebM, MOV, MKV, and AVI. Once loaded, a source preview appears alongside the video's duration and file size.
Pick your preferred Output Format: MP3 for universal playback on any device; AAC for Apple and Android devices; WAV or FLAC for lossless quality; OGG for open-source and web use; or OPUS for an efficient modern codec. For lossy formats, choose a Bitrate — 192 kbps is a great default for music, while 64–96 kbps is ideal for voice or podcasts.
Click Extract Audio when ready. A progress bar tracks FFmpeg's real-time progress. When done, you can preview the audio directly in the browser, then click Download to save the file. All processing uses FFmpeg.wasm — everything stays on your device, nothing is sent to any server.
FAQ
Is my video uploaded to a server?
No. All processing happens locally in your browser using FFmpeg.wasm. Your video file never leaves your device at any point.
Which output format should I choose?
Choose MP3 for the widest compatibility — it plays on every device, car stereo, phone, and media app. Use AAC for Apple devices and iTunes. Use WAV or FLAC if you need lossless quality for editing or archiving. Use OGG for open-source platforms and OPUS for modern streaming or low-bandwidth use.
What bitrate should I use?
For music, 192–320 kbps gives excellent quality. For podcasts or voice recordings, 64–96 kbps is sufficient and keeps file sizes small. 128 kbps is a good all-round default for general use.
Why does it take time on first load?
FFmpeg.wasm (~10 MB) is downloaded from a CDN (jsDelivr) on first use. Subsequent uses within the same browser session are instant because the engine is cached.
Is there a file size limit?
There is no hard limit, but very large files (over 2 GB) may run into browser memory limits. For best results, process files under 1 GB.
Can I extract audio from an AVI or MKV file?
Yes. This tool supports MP4, WebM, MOV, MKV, and AVI as input. The audio track will be extracted and converted to your chosen output format regardless of the input container.