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Want the song from a concert clip, the talk from a webinar recording or the sound effects from a video? Drop in the file, choose a format and, if you like, a part of the timeline, and save the audio on its own, processed entirely on your device.
Processing locally on your device
Overview
A video file is a container holding separate streams: usually one video track and one or more audio tracks. Extracting audio means reading the first audio track and saving it on its own, either copied exactly as it is or converted to another format. Phone videos and most MP4 files carry AAC audio, screen recordings and WebM files often use Opus, and MKV files may contain AC-3 or other surround formats.
Five output formats cover most needs. MP3 plays everywhere; choose LAME’s VBR V0 or V2 for music, or a constant 96–320 kbps. M4A holds AAC audio for Apple devices, and when the video’s sound is already AAC it is copied without re-encoding, which is instant and lossless. WAV is uncompressed 16-bit PCM for editing apps (about 10 MB per stereo minute at 44.1 kHz). FLAC is lossless at roughly half the size of WAV. OGG Opus gives the best quality per megabyte, with 64 kbps fine for speech.
Turn on Extract only part to pick a range on a thumbnail timeline: drag the handles, set them from the playhead, or type exact times. Only that section is decoded and saved, which is quicker than extracting everything and cutting it afterwards. WAV and FLAC keep the original sample rate and channels, including surround; MP3 and Opus are mixed down to stereo or mono where needed.
Extraction runs in FFmpeg compiled to WebAssembly, so the file never leaves your computer. Audio-only work is light: a long video usually finishes in seconds to a minute. The first run downloads the video engine (about 31 MB, cached afterwards), and the tool checks that the video actually has sound, with a clear message if it does not.
| Format | Typical size | Quality | Best for |
|---|---|---|---|
| MP3 VBR V2 | ~1.4 MB | Very good | Listening anywhere |
| M4A (AAC 192 kbps) | ~1.4 MB | Very good | Apple devices, phones |
| OGG Opus 96 kbps | ~0.7 MB | Very good | Small files, speech |
| FLAC | ~5 MB | Lossless | Archiving |
| WAV 16-bit 44.1 kHz | ~10 MB | Lossless, uncompressed | Editing |
Drop in a video file.
Choose MP3, M4A, WAV, FLAC or OGG Opus, and the quality where offered.
Optionally turn on Extract only part and set the range on the timeline.
Click Extract.
Play the result in the page and download it.
Use cases
Save a recital, concert or rehearsal clip as MP3 or FLAC to listen on your phone or share with the band.
Turn a recorded webinar, interview or class into an audio file for listening on the go. Opus at 64 kbps keeps an hour of speech under 30 MB.
Export WAV for a DAW or audio editor, or a small MP3 for a transcription service, without exporting the video.
Pick just the two seconds you need from a clip with the range option, and save them as WAV for a project.
Pro tips
Answers to common questions about the audio extractor.
MP3 for maximum compatibility, M4A for Apple devices and lossless copying of AAC sources, WAV for editing software, FLAC for lossless archiving at a smaller size, and Opus for the smallest files at good quality.
Copying to M4A from an AAC source is bit-exact, and WAV and FLAC are lossless. MP3 and Opus re-encode the sound, which at the default settings is not audible for most listeners.
The file contains no audio stream. That is common for screen recordings made without a microphone, GIF-style clips and some exported animations. There is nothing to extract from those.
WAV and FLAC keep all channels, such as 5.1 from an MKV movie file. MP3 and Opus are mixed down to stereo; M4A conversion keeps the channel layout.
The first audio track is extracted. For movies with multiple languages, that is normally the default language.
No. ToolEnhancer processes files on your own device inside the browser. They are never sent to, stored on or seen by our servers.
Yes. The audio extractor is free to use with no sign-up, no watermarks and no daily limits.