What bitrate should I choose?

96-128 kbps is a good balance for speech and most music. Go lower only if file size matters more than quality.

Will low bitrate make speech hard to understand?

No, speech stays clear even at low bitrates like 64-96 kbps, it's music with a wide frequency range that suffers more from heavy compression.

Does it change the audio format?

The output is encoded as MP3 regardless of your input format.

Does Compress Audio upload my files to a server?

No. Compress Audio runs entirely in your browser using on-device processing, your files never leave your device.

Compress Audio

Reduce audio file size while keeping quality.

Runs in your browser

Drop an audio file here

Choose File

Runs entirely in your browser using an on-device audio engine. The engine downloads on first use, then it's cached.

About this tool

An audio file larger than it needs to be — for email, storage, or upload limits — can be shrunk through compression without noticeably hurting sound quality if it's done with the right settings. This tool reduces audio file size while keeping quality, giving you a lighter file that still sounds right.

Frequently asked questions

Audio Converter

Convert audio files between common formats.

Trim Audio

Cut an audio file down to a specific start and end time.

Text to Speech

Convert written text into natural-sounding speech.

Speech to Text

Transcribe your speech into text using your microphone.

Merge Audio

Combine multiple audio files into one.

Audio Volume Booster

Increase or decrease the volume of an audio file.

Audio Speed Changer

Speed up or slow down an audio file.

Vocal Remover

Remove or isolate center-panned vocals from a stereo song.

Silence Remover

Automatically cut silent gaps out of an audio file.

Ringtone Maker

Turn a song or audio clip into a ringtone for iPhone or Android.

Audio Splitter

Split an audio file into multiple equal-length segments.

Audio Looper

Repeat an audio clip multiple times in a row.

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