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Extract audio from any video instantly in your browser - no upload needed

Convert MP4 to MP3 Online, Free

Extract audio from any video directly in your browser. Works with MP4, MOV, MKV, WebM and more, and outputs to MP3, AAC, WAV, FLAC or OGG. Your files never leave your device, so nothing is uploaded and your content stays completely private.

Drop your video here

or click to select a file

Works with MP4, MOV, MKV, WebM and more

🔒 Your files never leave your device - 100% private & secure

🔒 100% Private
No Upload
🌐 Works Offline
🆓 Completely Free

How to Extract Audio from Video Online

  1. Select your video

    Drop a video file onto the page or click Select Video. MP4, MOV, MKV, WebM and other formats are accepted.

  2. Choose format and quality

    Pick an output format - MP3, AAC, WAV, FLAC or OGG. Then select audio quality: Match Source attempts to copy the original audio without re-encoding when the output format is compatible with the source codec, or choose 320, 192 or 128 kbps for a specific bitrate.

  3. Extract and download

    Click Extract Audio. Processing runs entirely in your browser with no upload. When it finishes, download your audio file.

Audio Format Comparison

MP3 is the most widely compatible audio format and works on virtually every device and player - ideal for music, podcasts and general sharing. AAC offers better quality than MP3 at the same bitrate and is the default format on Apple devices. WAV is uncompressed and lossless, making it the best choice for professional editing where quality cannot be compromised, though files are much larger. FLAC provides lossless compression - the same quality as WAV in roughly half the file size - and is popular for archiving music collections. OGG (Vorbis) is an open-source format with quality comparable to AAC, commonly used in games and web applications.

Frequently Asked Questions

How do I convert MP4 to MP3 online for free?

Drop or select your video file on this page. Choose your output format and quality, then click Extract Audio. The conversion runs entirely in your browser - no upload, no signup, no cost. When it finishes, click Download to save your audio file.

Can I convert MOV, MKV or WebM files to MP3 too?

Yes. Despite the page name, this tool accepts all common video formats including MP4, MOV, MKV, WebM, OGV, and MPEG-TS. The audio track will be extracted regardless of the video container format.

Will the audio quality be reduced when converting?

It depends on your settings. If you select "Match source" and the source audio codec matches your chosen output format, the audio is copied directly with no quality loss. Otherwise, the audio is re-encoded at your chosen bitrate. Higher bitrates like 320 kbps preserve more detail.

How do I extract audio from a video without software?

This tool runs entirely in your web browser - no software installation needed. Open this page in Chrome or Edge, drop your video file, and click Extract Audio. The processing happens on your device using WebAssembly and WebCodecs technology.

What is the difference between MP3, AAC, and WAV?

MP3 is the most widely compatible compressed audio format - great for music and podcasts. AAC offers better quality at the same bitrate and is used by Apple devices. WAV is uncompressed lossless audio - perfect quality but much larger files. FLAC is compressed but lossless, offering a good balance of quality and size.

How long does it take to convert MP4 to MP3?

Speed depends on your device and file size. If the source audio matches your chosen format and you select "Match source" quality, the extraction is near-instant since no re-encoding is needed. Full transcodes typically process faster than real-time on modern devices.

Is there a file size limit for conversion?

There is no hard limit. The practical limit depends on your device's available memory. Since only the audio track is extracted, even large video files produce relatively small audio outputs. Most modern devices handle files up to several gigabytes without issues.

Are my files private and secure?

Yes. Your files never leave your device. VidShift has no backend servers that receive or store your media. All processing runs locally in your browser using WebAssembly, ensuring complete privacy. The tool even works offline after your first visit.

Can I use this as an audio extractor for any video format?

Yes - while this page is named MP4 to MP3, it works as a full audio extractor for any video format including MOV, MKV, WebM, AVI and more. Simply drop your video file and choose your preferred audio output format from the selector.

Can I extract audio as WAV or FLAC instead of MP3?

Absolutely. Use the format selector to choose WAV (lossless, large file), FLAC (lossless, compressed), AAC (smaller than MP3, great quality), or OGG. MP3 is selected by default as it is the most universally compatible.

What's the difference between MP3 and AAC for extracted audio?

AAC generally produces better audio quality than MP3 at the same file size, and is the default format on iPhones and Apple devices. MP3 is more universally supported across all devices and players. For most uses, either is fine - choose MP3 for maximum compatibility or AAC for slightly better quality.