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LiveStays on your deviceVideo & audio

Compress audio

Re-saves audio as a compact MP3. The defaults suit speech, so an hour-long meeting recording becomes small enough to send. This tool reads the file with your browser's own built-in media player. Chrome, Edge and Safari read MP4, MOV, M4A, MP3, WAV, OGG and WebM. If your browser cannot play a file, the tool tells you so rather than producing an empty result.

Choose your file

Drop your files here

MP3, WAV, M4A, AAC, OGG, OGA, OPUS, FLAC, WEBA files. Nothing is uploaded — your files stay on this device.

Settings

Halves the size. Right for speech and meeting recordings; avoid it for music.

Add a file to continue.

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About Compress audio

What does Compress audio do?
Re-saves audio as a compact MP3. The defaults suit speech, so an hour-long meeting recording becomes small enough to send. This tool reads the file with your browser's own built-in media player. Chrome, Edge and Safari read MP4, MOV, M4A, MP3, WAV, OGG and WebM. If your browser cannot play a file, the tool tells you so rather than producing an empty result.
Who is it for?
Creators preparing clips for a platform, teams that record meetings and need the content in writing, and anyone whose video file is too large to send.
Is it free?
Yes. Compress audio is free with no account, no watermark on your output, no daily cap and no trial period. Because it runs on your own device it costs us nothing to run, which is why there is no catch.
Is it safe to use with confidential files?
Yes, and not because we promise to behave. Compress audio never sends your file anywhere — the work happens in your browser. There is no upload, so there is no copy of your document in our systems at any point.
What file formats are supported?
Input: MP3, WAV, M4A, OGG. Output: MP3.
How small will it get?
At the default speech setting (64 kbps, mono) an hour of audio is about 29 MB. If your file was already compressed below that, it cannot get smaller, and the tool tells you rather than handing back a bigger file as if it had worked.

How to use it

  1. 1

    Add your file

    Drag it onto the box above, or use Browse files. On a phone you can also take a photo or pick from your camera roll.

  2. 2

    Check the settings

    Sensible defaults are already chosen. Most people never need to change them.

  3. 3

    Run it

    The progress bar shows real progress, not a decorative animation. Everything happens on your device.

  4. 4

    Preview the result

    Look at the output before you download. If it is not right, adjust a setting and run it again — nothing has been saved anywhere.

  5. 5

    Download

    Save the file. Closing this tab discards it from memory, so download anything you want to keep.