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Audio Compressor

Make audio files smaller for email, chats and uploads.

Compression

128 kbps: hard to tell from the original for most music.

More options

MP3, WAV, M4A, AAC, FLAC, OGG and Opus, many files at once

Drop more files anywhere on this page, or

    Runs on your device. No upload wait.

    What you get

    • Presets that make sense
    • Never bigger

    Questions

    How much smaller will my file get?

    It depends on where it starts. A WAV or FLAC shrinks to a tenth or less. An MP3 at 320 kbps drops to about 40% at the balanced setting, to 30% at the smaller one. A file already at 128 kbps or lower gains little.

    Which preset for podcasts and lectures?

    Voice: 64 kbps mono. Speech stays clear, and an hour takes about 28 MB. Music played this way loses its stereo width.

    What format do I get?

    The same as the original when possible: MP3 stays MP3, M4A stays M4A, Opus stays Opus. WAV and FLAC become MP3, since lossless formats can’t be made much smaller. You can choose MP3 or M4A for everything under Save as.

    Can I compress to an exact size?

    Not directly: audio size is bitrate times length. For a size limit, divide it by the length. For example, 10 MB for 10 minutes allows about 130 kbps, so the balanced preset (128 kbps) fits.

    Are my audio files uploaded anywhere?

    No. Your audio files are opened and processed on your device, and the results are saved straight back to it. Nothing is uploaded. How to check.

    Is it free? Do I need an account?

    It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.

    Missing something, or not working as it should? Tell us