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MP3 to MP4 Converter

Create an MP4 video from an MP3 audio file. Add an optional JPG, PNG or WebP cover image, or use a plain dark background. The image is fitted without cropping. Your audio and image are processed entirely on your device.

.mp3 · Up to 100 MB per file

    On first use, about 10 MB of conversion software downloads from this site. Your files stay local. Short clips work best; processing stops after ten minutes. Unsupported codecs, protected files, or insufficient memory can prevent conversion. Bitrate applies to lossy audio outputs; WAV and FLAC use lossless encoding. Extra tracks, subtitles and metadata are not preserved.

    How to use MP3 to MP4 Converter

    1. Choose your MP3 audio file.
    2. Optionally choose a cover image and select the output resolution.
    3. Create your MP4 locally using the audio and cover image or plain background.
    4. Preview and download the video.

    Frequently Asked Questions

    Clear answers regarding conversion, privacy, and technical capabilities.

    How can an audio file become a video?

    The tool creates a static picture track and combines it with your MP3 audio in an MP4 container. You can supply a cover image or use the default dark background.

    Will it create an animation or subtitles?

    No. This tool creates a still-image video with your audio. It does not generate visuals, transcriptions or subtitles.

    Are my audio and cover image uploaded?

    No. Both files are read into a local FFmpeg WebAssembly worker in your browser.

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