Local · Private · Free

Video to MP3 / Audio

Pull the audio out of any video as MP3, WAV or M4A — or convert one audio file to another — all processed on your own device. Nothing uploads.

The page works offline. Your first conversion downloads a one-time audio engine (~25 MB) from a public CDN — after that it runs entirely on your device. The media itself is never uploaded.

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Drop a video or audio file
or click to browse — MP4, WebM, MOV, MP3, WAV, M4A & more

🔒 Your file never leaves your browser

Source

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Output format

Bitrate (quality) Higher = better sound but larger file. Applies to MP3 & M4A/AAC.

Copies the existing audio track out of the file without re-encoding — instant and lossless. The container is chosen automatically (usually .m4a). If the file has no separate audio track, pick MP3, WAV or M4A instead.

WAV is uncompressed 16-bit PCM — perfect quality, but larger files. Always works.

Result

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This browser can’t run the audio engine

The in-browser engine needs WebAssembly and modern JavaScript modules. Try the latest Chrome, Edge, or Firefox on a desktop.

Why convert audio in the browser?

Most free "video to MP3" sites upload your file to their servers. HeroTools runs a WebAssembly build of FFmpeg directly in your browser, so your media is processed on your own machine and never leaves it. The engine downloads once, then works offline. If MP3 is unavailable in your browser build, WAV and M4A always work — the tool will tell you and you can switch with one click.

About Video to MP3 / Audio

Video to MP3 / Audio is a free, private media tool that runs entirely in your web browser. Extract MP3/WAV audio from a video, or convert audio formats — in your browser (one-time engine download). Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for video to mp3, mp4 to mp3, extract audio, audio converter. Like every HeroTool by Digital Heroes, Video to MP3 / Audio is 100% free with no limits.

Frequently asked questions

Is Video to MP3 / Audio free?

Yes — Video to MP3 / Audio is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Video to MP3 / Audio runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page and the one-time audio engine have loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Video to MP3 / Audio do?

Extract MP3/WAV audio from a video, or convert audio formats — in your browser (one-time engine download).