Audio Compressor
Shrink Audio File Size
Reduce audio file size by optimizing format, bitrate, channels, or sample rate while displaying estimated and final file sizes.
What is Audio Compressor?
Audio Compressor reduces the file size of MP3, WAV, FLAC, and M4A audio files so they load faster on websites, fit within email attachment limits, and use less mobile data. By adjusting sample rate, channel count (Stereo to Mono), bit depth, and target bitrate, you can shrink audio files by up to 80% while viewing exact original vs compressed file sizes and percentage saved.
How to Use Audio Compressor
Upload your audio file
Select the audio file you want to shrink, or click Load Sample Audio.
Choose a compression preset
Pick Web Optimal, Voice / Podcast Compact, Email / WhatsApp Ultra-Small, or customize settings.
Compare estimated size & preview
Check the live compressed size calculation and play the preview to verify audio quality.
Download compressed file
Save the smaller audio file directly to your device.
Key Features
Displays Original Size, Compressed Size, and exact Percentage Saved
One-click Mono conversion immediately reduces stereo file size by 50%
Sample rate optimization (44.1 kHz down to 22.05 kHz, 16 kHz, 11.025 kHz, or 8 kHz)
Compact 8-bit and 16-bit encoding options for voice notes and web assets
Real-time audio preview before downloading
Tips & Best Practices
- 1
For spoken-word podcasts and interviews, switching to Mono at 22.05 kHz cuts file size by 75% with minimal difference to human ears.
- 2
Use 44.1 kHz Stereo when compressing music tracks to preserve high-frequency cymbal sparkle.
Why Use Our Online Audio Compressor?
Audio Compressor processes and generates audio directly inside your browser using modern Web Audio and Speech APIs. Your text and voice recordings stay private on your device with zero server uploads required.
Frequently Asked Questions
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