Audio Extractor
Drop your file here
or click to browse
MP4 · WebM · MOV · MKV · MP3 · M4A · OGG · WAV
What Is This Tool?
Audio Extractor is a free, browser-based tool that pulls the sound track out of a video file and saves it as a standalone audio file. Drop in an MP4, WebM, MOV or MKV video, see the details of its audio track, pick an output format — MP3, M4A, OGG or WAV — and download the result. Everything happens locally on your device; the video is never uploaded.
Creators run into this need constantly: keeping the voiceover from a recording, saving the music bed of a clip for editing, turning a talking-head video into a podcast episode, or archiving the audio of a long recording at a fraction of the size. This tool makes that a drag-and-drop job with no editor timeline involved.
Why Use This Tool?
Online "video to MP3" converters typically require you to upload the whole video to a server, wait in a queue, and trust the operator with your footage — uncomfortable for client work, unreleased content or anything personal. Desktop converters avoid that, but installing a full video suite just to strip an audio track is overkill.
This tool reads the video directly in your browser. Because no upload is involved, extraction starts immediately, works with files of any size your device can handle, and keeps private footage private. When the source codec already matches your chosen output, the audio data is copied over without re-encoding, which is both instant and lossless.
How It Works
The tool uses a browser-native media pipeline to demux your video file: it opens the container, finds the primary audio track and reads its codec, channel count, sample rate and duration. When you convert, the audio packets are written into a new audio-only file in the format you picked.
If the source codec matches the target — for example an AAC track inside an MP4 going out as M4A — the compressed audio is copied packet by packet with zero quality loss. When a different format is needed, such as MP3 from a WebM file, the audio is decoded and re-encoded locally using your browser's media engine. Either way, the video stream is discarded and never decoded, which keeps the process fast even for long recordings.
How to Use
Follow these steps to extract audio:
- Drop a video file onto the upload area, or click to browse — MP4, WebM, MOV and MKV are supported, as well as audio files you want to convert.
- Wait a moment while the tool reads the audio track and shows its codec, duration, channels and sample rate.
- Choose an output format: MP3 for maximum compatibility, M4A for efficiency, OGG for open formats, or WAV for lossless editing.
- Press the extract button and watch the progress bar.
- Download the audio file, or press reset to process another video.
If you plan to edit the audio afterwards, choose WAV to avoid generation loss; for sharing and playback, MP3 or M4A keeps files small.
Features
- Extract audio from MP4, WebM, MOV and MKV videos.
- Also converts standalone audio files between formats.
- Output as MP3, M4A (AAC), OGG (Opus) or WAV.
- Lossless stream copy when the source codec matches the output format.
- Track info display: source codec, duration, channels and sample rate.
- Live progress during conversion.
- No uploads, no queue, no file-size surprises — everything runs locally.
Frequently Asked Questions
Is my video uploaded anywhere?
No. The file is opened and processed entirely in your browser. Nothing is sent over the network, so extraction works for confidential or unreleased footage.
Which output format should I choose?
MP3 plays on virtually every device and app. M4A (AAC) gives similar quality at a smaller size and is well supported on modern devices. WAV is uncompressed and best when you will edit the audio further. OGG (Opus) is efficient and open, but less universally supported.
Is the extraction lossless?
When the source codec matches the output format — for example, an AAC track exported as M4A — the audio is copied without re-encoding, so it is bit-for-bit identical. Converting to a different codec requires re-encoding, which involves a small quality trade-off at typical bitrates.
Why is MP3 greyed out for my file?
The tool checks your browser's encoders at runtime. If a format is unavailable on your browser, it is marked as unsupported — choosing M4A or WAV instead usually works everywhere.
What video formats are supported?
MP4, WebM, MOV and MKV containers, plus common audio files (MP3, M4A, AAC, OGG, WAV, FLAC) if you simply want to convert audio between formats.
Is there a file size limit?
There is no fixed limit — processing happens on your device, so the practical ceiling is your available memory. Long recordings take proportionally longer to convert, but copying without re-encoding is fast even for large files.