Online Audio Compressor — Shrink MP3, WAV & FLAC Files
Professional-grade audio compression that happens entirely in your browser. Choose your target bitrate. Your files never leave your device.
Drop files here
Max 15 MB
First use requires a one-time setup to enable private, local processing. Your files never leave your device.
How to Compress Audio Online Free
Compress MP3, WAV, and OGG audio files free in your browser. Choose your target bitrate to control the size-quality tradeoff. Uses FFmpeg WebAssembly — processing is local, files never leave your device. Free, no signup, no file limits.
Upload audio file
Select your MP3, WAV, or OGG file to start the local compression process.
Pick a bitrate
Choose from standard presets to balance file size and sound fidelity.
Save your file
Download the compressed audio file immediately after processing.
100% Private
Files never leave your device or browser. 100% data security.
Instant Processing
No upload wait. Compression happens in seconds on your device.
Free Forever
No account, no limits, no cost. Simple and direct audio tools.
How It Works
Upload
Drag & drop or browse your file. It stays in your browser — nothing is uploaded.
Compress
Our local algorithms process your file at your chosen quality setting.
Download
Save your optimized file instantly. No waiting, no server queues.
Supported Formats
Why Simple Compressor?
100% Private
Files are processed locally on your device. Nothing is ever uploaded to a server.
Instant Speed
No upload or download wait. Speed is limited only by your hardware, not your internet.
No Quality Loss
Smart algorithms target invisible data, preserving visual and auditory fidelity.
No Signup Required
No account, no limits, no watermarks. Just a clean utility tool.
Any Device
Works in any modern browser on desktop, tablet, or mobile.