Audio Compressor
Compress audio files to reduce size by up to 90% using preset or custom settings. Adjust bitrate, sample rate, and mono/stereo channels with real-time size estimates. All processing happens in your browser -- no uploads, completely private.
Drop audio file here or click to upload
Supported formats: .mp3, .wav, .ogg, .aac, .m4a, .flac, .webm
All processing happens in your browser. Your audio never leaves your device.
How to Use Audio Compressor
- Upload your audio file (MP3, WAV, OGG, FLAC, AAC, M4A up to 500MB) by dragging and dropping or clicking the upload area
- Choose a compression preset (High Quality, Medium, Small Size, Minimum Size) or select Custom to configure bitrate, sample rate, and channels manually
- Review the estimated compressed file size and compression ratio before processing, so you can adjust settings to meet your target size
- Click 'Compress Audio' to process entirely in your browser, then compare original and compressed sizes and download the optimized file
Tips
- • Use 'High Quality' preset for music that needs to sound good
- • Use 'Minimum Size' for voice recordings or podcasts
- • Lower bitrate = smaller file but reduced quality
- • Mono audio is half the size of stereo
Frequently Asked Questions
Yes, EZ2Conv's Audio Compressor is 100% free with no hidden fees, no usage limits, and no premium tiers. Compress unlimited audio files using four quality presets or fully custom settings with adjustable bitrate, sample rate, channels, and optional normalization -- all without any restrictions or account.
Absolutely. All decoding, compression, and MP3 encoding run entirely in your browser using the Web Audio API and a client-side encoder. Your audio files are never uploaded to any server at any stage. Both original and compressed files remain on your device throughout the process.
No registration or login required. Instantly access four compression presets, custom bitrate/sample rate/channel settings, real-time size estimation, and optional audio normalization. No account, no email -- just upload, compress, and download.
File size reduction depends on your settings and original file quality. With the 'Minimum Size' preset, you can achieve up to 90% reduction. Using mono audio instead of stereo halves the file size. Lower bitrates (64-96 kbps) are ideal for voice recordings, while 128-192 kbps works well for music.
Compression involves a trade-off between file size and quality. The 'High Quality' preset (192 kbps) preserves excellent audio fidelity for music. For voice recordings and podcasts, even lower bitrates sound great. Use the preset that matches your content type for the best results.