About Audio Extractor
Audio Extractor pulls the audio track out of any video file and saves it as MP3, WAV, AAC or OGG. Pick an output format and bitrate; the conversion runs in your browser via ffmpeg.wasm — your video is never uploaded. When the source audio is already in the format you want, it's stream-copied for an instant lossless extract; otherwise it's transcoded. Useful for grabbing the audio from interviews, lectures, music videos and screen recordings.
- No uploads
- Browser-only
- Works offline
- 100% free
How it works
- 1
Drop a video
MP4, MOV, MKV, WebM. The detected audio codec, sample rate and channels are shown before you extract.
- 2
Pick format + bitrate
MP3 (universal), WAV (lossless), AAC (modern, smaller), or OGG (open-source). For lossy formats, choose a bitrate from 64 to 320 kbps.
- 3
Extract and download
If the source matches the output, ffmpeg.wasm stream-copies in seconds. Otherwise it transcodes; either way you get a downloadable file at the end.
Related tools
Browse allTrim and clip an audio file — drag the waveform handles.
Whisper speech-to-text running on-device. 15 languages, SRT/VTT subtitles. Audio never leaves your browser.
Cut a clip from any video in your browser. Fast stream-copy by default, frame-accurate re-encode if you need it.
Compress MP4/MOV/WebM videos with H.264 in your browser via ffmpeg.wasm. Configurable quality + resolution. Nothing uploaded.
Frequently asked questions
Are my files uploaded to a server?
No. Every tool on SnapToolz runs entirely inside your browser using JavaScript and WebAssembly. Your file is read locally, processed in memory, and the result is offered as a download. Nothing is sent to a server — there isn't one to send to.
Will the audio quality degrade?
If you choose WAV, or pick a format that matches the source (e.g. AAC from an MP4, MP3 from an MP3 stream), the audio is stream-copied — bit-for-bit identical to the source. Transcoding to a different lossy format always loses a small amount of quality; for music, prefer WAV or a high bitrate (192+ kbps).
What bitrate should I pick?
128 kbps MP3 is the classic 'sounds fine for speech and most music' choice. 192 kbps is a comfortable upgrade for music. 320 kbps is the highest MP3 and effectively transparent. For voice memos and podcasts, 96 kbps is plenty.
Why is WAV so much larger?
WAV is uncompressed — one second of CD-quality stereo is about 170 KB, so a 30-minute extract is over 300 MB. It's the right choice when you need to edit further without quality loss; otherwise MP3 or AAC is much smaller for the same listening experience.
Does it work offline?
Yes. SnapToolz is a Progressive Web App. After your first visit, the app is cached on your device and every tool keeps working without an internet connection.
Is SnapToolz free?
Yes — every tool is 100% free with no sign-up, no watermark, no hidden tier. The whole platform is open source and we have no plan to gate features.