Compress MP3, WAV, FLAC, and AAC audio files with custom bitrate settings. Batch process multiple files instantly. 100% free, no signup, all processing happens in your browser.
Audio Compressor
Load the audio engine to start compressing audio files in your browser.
Compress MP3, WAV, FLAC, AAC, and OGG audio files
Reduce file size with custom bitrate selection
Batch compress multiple audio files at once
Choose from 64, 128, 192, 256, or 320 kbps bitrate
Drag and drop file upload
Download individual or all compressed files
See exact file size savings for each file
100% client-side processing with FFmpeg WebAssembly
No file upload to any server
Works offline after loading the audio engine
Reduce audio file size to fit within email attachment limits. Compress large recordings before sending.
Free up disk space by compressing your audio library. Reduce hundreds of files in batch.
Compress podcast episodes for faster downloads and lower hosting bandwidth costs.
Shrink audio files to share on WhatsApp and other messaging apps with file size limits.
Optimize audio files for web playback. Smaller files mean faster page loads and better user experience.
Compress audio before uploading to Google Drive, Dropbox, or other cloud storage to save space and upload time.
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The fastest, most private way to compress audio files online. Your files never leave your device.
Reduce audio file sizes by 50-90% depending on the source format and target bitrate.
Audio files never leave your device. All compression happens locally in your browser using WebAssembly.
Compress multiple audio files at once. No limits on the number of files you can process.
Choose from 5 bitrate options (64-320 kbps) to balance file size and audio quality.
Once the audio engine loads, compress files without an internet connection.
Download compressed audio files immediately. No waiting, no email required.
Choose the right bitrate for your use case
| Bitrate | Quality | Best For | Typical Reduction |
|---|---|---|---|
| 64 kbps | Low | Voice recordings, spoken word, podcasts with speech only | 70-90% |
| 128 kbps | Standard | General listening, background music, casual playback | 50-75% |
| 192 kbps | High | Music streaming quality, good balance of size and clarity | 40-60% |
| 256 kbps | Very High | High-fidelity music, professional presentations | 25-45% |
| 320 kbps | Best | Near-lossless quality, audiophile listening, archival | 10-30% |
More free audio tools
Audio compression is essential for managing storage, sharing files via email or messaging apps, and optimizing web content. Uncompressed formats like WAV can be 10-50x larger than compressed MP3 files. Our free audio compressor lets you reduce file sizes while maintaining acceptable listening quality.
Unlike cloud-based audio compressors that upload your files to remote servers, our tool processes everything locally in your browser using FFmpeg compiled to WebAssembly. Your audio files never leave your device, ensuring complete privacy for sensitive recordings, voice notes, and personal audio.
For voice recordings and podcasts, 64-96 kbps provides clear speech with minimal file size. For music, 128-192 kbps is the sweet spot for most listeners. Audiophiles and professionals should use 256-320 kbps for near-lossless quality. Lower bitrates mean smaller files but less detail.
Need to compress an entire music library or batch of podcast episodes? Our batch processing feature handles unlimited files with a single bitrate setting. Add all your files, choose your target bitrate, and download everything compressed at once. No limits, no signup, completely free.
Shrink MP3 files for email, WhatsApp and uploads without wrecking the sound — free, online, no signup.
Clean up hiss before compressing so you can go to an even lower bitrate without losing clarity.