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MP4 to MP3

Save the audio from an MP4 video as an MP3 file. The video picture is left out; choose an audio bitrate and download the extracted soundtrack.

Audio and transcripts stay on your device. Processing runs in your browser.
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Choose a file

MP4. Up to 100 MiB per file (50 MiB on touch devices), 1800 seconds. Decoded audio memory limits also apply.

    Settings

    Bitrate applies to MP3 and AAC. WAV uses 16-bit PCM; FLAC is lossless. OGG uses quality-based encoding.

    Result

    Your result will appear here

    Add a file, pick your settings, then select Convert audio.

    No account or daily usage quota. File and device limits protect your browser from running out of memory.

    Processing audio

    Checking your settings…

    How to use MP4 to MP3

    1. Choose your MP4 file from your device. The page checks the extension, file header and readable duration.
    2. The output format is fixed to MP3 for this converter.
    3. Set the sample rate and mono or stereo channels. Set a bitrate for MP3 or M4A output.
    4. Press Convert audio. The processing engine loads only when needed.
    5. Play the result and download it when it suits your needs.

    What happens to the video track?

    The converter reads the first audio stream in your MP4 and encodes it as MP3. It does not turn video frames into audio or keep the picture. A silent MP4 has no soundtrack to extract.

    This is useful for a lecture, interview or recording you made when you need an audio-only copy. If the source has several language tracks, this tool uses the first audio track. Protected or encrypted media is unsupported.

    A practical workflow

    Choose a video you recorded, convert its soundtrack to MP3, and listen for speech, music and channel balance. The saved MP3 contains no picture.

    To remove an unwanted section from an MP3 copy, open MP3 Cutter. To reduce the bitrate of an existing MP3, use MP3 Compressor.

    Before you download

    • Only a readable, supported audio stream can be converted. Encrypted files and damaged media are unsupported.
    • Large files may exceed browser memory even when their compressed size fits the displayed limit.
    • Changing format does not guarantee a smaller file or better sound. Output tags and artwork may differ from the source.

    Frequently asked questions

    Does extracting MP3 keep the original audio quality?

    The audio is re-encoded to MP3, a lossy format. A higher bitrate retains more detail but cannot improve a low-quality source. The original MP4 stays unchanged.

    Is my MP4 file uploaded?

    No. The file is read and processed in your browser. The audio engine downloads from this site, but the selected media is not sent to a server.

    Can I choose mono output?

    Yes. Choose Mono under Channels. This downmixes the recording into one channel; it does not isolate a voice or remove background music.

    Why can a file fail below the size limit?

    Compressed size does not describe decoded memory use. Duration, sample rate, channels, codec support and available browser memory also affect whether processing succeeds.

    Often used together with MP4 to MP3.

    • Audio Converter

      Convert between common audio formats with bitrate and channel controls.

    • MP3 Compressor

      Reduce MP3 bitrate and compare the output size before downloading.

    • MP3 Cutter

      Trim MP3 audio with waveform positioning and exact time fields.