Audio Compressor Online

Reduce audio file size for sharing, messaging, or storage. Choose a format and quality level, then compress the file directly in your browser.

How to compress audio

Reduce an audio file in three steps

Choose a file, select a compression level, and save a smaller copy directly to your device.

  1. 01

    Choose an audio file

    Select a supported audio file from your device. The source file remains in your browser.

  2. 02

    Set the target size and quality

    Choose MP3, M4A, or OGG and lower the bitrate to reduce the estimated output size.

  3. 03

    Compress and download

    Compress the file locally and download the smaller audio file directly to your device.

Private audio compression

Make audio files smaller without uploading them

AudioTidy runs the compression engine in your browser, helping you prepare smaller audio files for email, messaging, storage, and sharing.

Estimate the output size

See an approximate file size and potential savings before starting the compression.

Choose the right balance

Use 64 or 96 kbps for speech and compact files, or 128 and 192 kbps when audio quality matters more.

Files stay on your device

Your source audio is compressed locally in your browser instead of being uploaded to a remote server.

Audio compressor FAQ

Frequently asked questions about compressing audio

Learn how bitrate, format, channels, and local browser processing affect your compressed audio.

How do I reduce the size of an audio file?

Choose an audio file, select a lower bitrate and output format, then select Compress audio. The smaller copy downloads directly to your device.

Is my audio uploaded to a server?

No. Your source file stays on your device and is processed locally in your browser.

Which compression level should I use?

128 kbps is a balanced default. Try 64 or 96 kbps for speech and smaller files, or 192 kbps when retaining more quality matters.

Will compression reduce audio quality?

Usually. Lower bitrates create smaller files by discarding more audio information. Start with 128 kbps and lower it only when you need a smaller file.

Should I choose mono or stereo?

Mono works well for many voice recordings. Keep stereo for music or recordings where left and right channel separation matters.

Why is the final size different from the estimate?

The estimate is based on duration and target bitrate. Container metadata and encoder behavior can make the downloaded file slightly larger or smaller.