Audio Compressor
Compress Audio Online Free. Reduce audio file size while maintaining quality. No upload required. Supports MP3, WAV, AAC, OGG, FLAC formats.
Drag & Drop Audio File
or click to browse
Supported: MP3, WAV, OGG, M4A, FLAC, AAC
How the Audio Compressor Works
This online audio compressor uses the same FFmpeg engine found in professional editing software, compiled to WebAssembly. Your audio is processed directly in your browser, so files never leave your device and stay 100% private.
1. Upload your audio file
Drag and drop any supported audio file or click the upload area to browse from your device. The tool instantly analyzes the duration, format, and original file size.
2. Choose compression settings
Select your preferred compression level, output format, sample rate, and channel layout. The estimated size reduction indicator helps you balance quality and file size.
3. Compress and download
Click Compress Audio to start processing. Once finished, you can instantly play a preview and download the optimized audio file to your computer or mobile device.
Key Features & Benefits
Reduce audio file size without installing software. Perfect for podcasts, voice recordings, music tracks, ringtones, and social media clips.
Private & secure
Compression happens entirely in your browser. No audio files are uploaded to a server, which keeps personal recordings and client work fully confidential.
Fast and responsive
Because there is no upload or download delay, even large audio files are compressed quickly, limited only by your device performance.
Control over quality
Fine-tune bitrate, sample rate, channels, and output format to keep speech clear or music rich while still shrinking the file size significantly.
Works on any platform
Use this audio compressor on Windows, macOS, Linux, Android, or iOS in any modern browser like Chrome, Firefox, Edge, or Safari.
Perfect for sharing
Create smaller audio files that upload faster to email, messaging apps, learning platforms, or social networks without hitting size limits.
Completely free
There are no sign-ups, watermarks, or usage caps. You can compress as many audio files as you want at no cost.
Frequently Asked Questions
Learn more about how this free audio compressor works and how to get the best results.
No. All encoding and compression steps happen locally in your browser using WebAssembly. The original and compressed audio files stay on your device.
You can upload popular formats like MP3, WAV, OGG, M4A, FLAC, and AAC. Output formats include MP3, OGG, M4A (AAC), and OPUS, which are widely supported on most devices and platforms.
Any lossy compression can affect quality, but choosing a moderate bitrate and keeping a reasonable sample rate usually gives transparent results for speech and casual listening. For critical music work, use the "Low" or "Medium" compression levels.
Yes. The tool runs in any modern mobile browser. For the best performance, keep other tabs closed and avoid compressing extremely large files on low-memory devices.
There are no usage limits. You can compress as many audio files as you like, as long as your browser has enough memory to handle the file size.
No installation is required. Open this page in your browser, load your audio file, and start compressing immediately. Everything you need is loaded with the page.