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    Convertly Converter

    Convert MP4 to MP3 online

    Convert MP4 files to MP3 online.

    Accepted source formats

    MP4

    Available output formats

    MP3

    How it works

    1

    Upload

    Drag and drop or select your MP4 file from your device

    2

    Convert

    Click "Convert" and wait a few seconds

    3

    Download

    Get your converted MP3 file instantly

    Common mistakes

    • Using a source file of poor quality.
    • Publishing without checking the final result.
    • Confusing file size, dimensions and quality.
    • Overwriting the original file without keeping a copy.

    Pro tips

    • Always keep an original version.
    • Test several settings before downloading.
    • Use WebP for the web when possible.
    • Choose descriptive file names for SEO.

    Privacy and file handling

    File handling depends on the selected tool and format. For sensitive files, review the tool information before starting the operation.

    Keep the sound, drop the picture

    Extracting audio from an MP4 is about isolating what actually matters: a lecture, a filmed podcast, a screen recording’s narration, an interview, or a music video’s soundtrack. The resulting MP3 is a fraction of the original video’s size and plays on any audio player — no need to keep the whole video around for a purely audio use case.

    Audio quality depends on the source track

    The resulting MP3 inherits the quality of the audio track encoded in the MP4: a video shot with a phone’s built-in mic will give a decent but not studio-grade MP3; a video with a professional audio track will convert cleanly. The conversion can’t improve a poor source recording. Convert MP4 files to MP3 online.

    Handy for turning a meeting or lecture recording into audio

    Many video-call tools only export video. Converting that recording to MP3 lets you replay it in the background, on a commute, or offline, without the storage footprint of a video file. A quick check can prevent problems later. The result depends on what the MP4 and MP3 formats can preserve.

    Discover all our tools

    Convert, compress, merge and edit your files in a few clicks.

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    Complementary tools

    PDF → PNGJPG → PDFMP3 → WAVZIP → PDF

    Guides and tutorials

    Learn how to use our tools with our detailed guides.

    Blog — Convert Video

    Frequently asked questions

    The MP3 keeps the MP4’s audio track as-is: its quality depends on the original recording, not on the conversion itself.

    No, only the audio track is extracted; the video itself isn’t included in the resulting MP3 file.

    It depends on the file’s length and your device’s power; a one-hour video usually takes a few minutes, processed directly in your browser.

    The video’s main audio track is used for the MP3 conversion.