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Compress Audio Files

Shrink audio files for email, chat and uploads.

  • 100% Free
  • No Sign Up
  • Nothing Uploaded

Compress audio

Make audio files smaller by lowering the bitrate

Drag & drop an audio file

or click to browse. You can also paste.

MP3, WAV, M4A, FLAC, OGG or any audio, up to your device's memory.

Lower is smaller. 96 kbps suits speech; 128-192 suits music.

Result-

Processed on your device. Nothing is uploaded.

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How to use the compress audio

Three steps, all in your browser.

  1. 1

    Add your audio

    Drop or choose an audio file.

  2. 2

    Choose settings

    Pick the format and quality.

  3. 3

    Download

    Save the converted file.

Compress Audio Files: what to know

An audio file's size depends mainly on its bitrate and its length. Uncompressed WAV and lossless FLAC use far more data per second than a lossy format like MP3 needs, and many recorders and apps save MP3s at a higher bitrate than speech or casual listening requires.

This tool decodes your audio in the browser and re-encodes it as MP3 with LAME compiled to WebAssembly at the bitrate you choose. Lower bitrates give smaller files with less detail. Converting stereo speech to mono also helps, since a voice recording rarely benefits from two channels. Your files never leave your device.

Compression works best on WAV, FLAC and high-bitrate files. Re-encoding an MP3 at the same or a higher bitrate costs quality without saving space, so pick a bitrate below the original. Because MP3 is lossy, the detail removed can't be restored later, so keep the original if you might need it.

Popular uses

  • Fitting recordings under email attachment limits
  • Sending voice notes and interviews in chat apps
  • Meeting upload limits on course and job portals
  • Saving storage on phones and laptops

Tips for the best result

  • Use a low bitrate for speech and a higher one for music.
  • Trim silence and unneeded sections first; shorter files are smaller.
  • Listen to the result on headphones before sending it.
  • Convert stereo speech to mono where possible for a further saving without audible loss.

Read how JustYourConvert works and our privacy details. Keep your original files and check a converted file before you replace anything.

Frequently asked questions