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Audio Converter (MP4 to MP3 & more)

Extract audio from video or music files and convert it to MP3, WAV and other formats.

Files never leave your device · Processed in your browser

Output format

Trim (optional)

What is audio conversion?

Pulls just the sound out of a video or audio file and saves it as MP3, WAV, M4A, OGG or FLAC. For example, turn the voice track of a lecture or screen recording (MP4) into an MP3. Everything runs inside your browser.

How to use it

Pick or drop a file, choose an output format, optionally adjust bitrate, channels, sample rate or trim range, then press Convert. Progress is shown, you can cancel any time, and you can preview the result before saving.

Privacy & safety

Reading, decoding, encoding and saving all happen entirely in your browser — files are never uploaded or stored on a server.

Only convert files you own or have the right to use. Copyrighted music or video may be used only within what the rights holder allows.

Supported formats
  • Input: video or audio your browser can read (MP4, MOV, WebM, MP3, WAV, M4A, OGG, FLAC…). Only the sound of a video is used.
  • Output: MP3, WAV, FLAC (all browsers); M4A (AAC) and OGG (Opus) in recent Chrome, Edge, Safari and others that support WebCodecs.
  • Video-to-video conversion is not supported.

FAQ

Can I extract just the sound from an MP4 as MP3?
Yes. Upload a video such as MP4, MOV or WebM, choose MP3 as the output, and only the audio track is saved. Converting a video into another video format is not offered.
Which files can it read?
Anything your browser can play (decode). MP3, WAV, M4A, OGG, FLAC, MP4, MOV (AAC) and WebM usually work, but codecs the browser does not support, such as WMA, AVI or MKV, show a “cannot read this file” message. Try again in the latest Chrome or Edge.
Is my file uploaded to a server?
No. Reading, decoding, encoding, previewing and saving all happen in your browser only — nothing is sent or stored on a server. Closing the page discards all data.
Should I pick MP3, M4A, OGG or FLAC?
Choose MP3 for maximum compatibility, M4A (AAC) or OGG (Opus) for better quality at the same size, and lossless FLAC (or large WAV) to keep the original sound. For lossy formats, around 192 kbps is enough for most uses.
Can it convert long files?
Yes, but the whole sound is held in memory, so files longer than 60 minutes need a lot of time and memory. Files over 500 MB are not opened; for long files, use the trim option and convert in parts. Progress is shown and you can cancel any time.
The M4A or OGG option is disabled.
Those two formats use the browser's built-in audio encoder (WebCodecs), so support differs by browser. A disabled option means your browser cannot encode it; recent Chrome and Edge usually can. MP3, WAV and FLAC work in every browser.

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