Audio Compress
Compress audio to a specified size or bitrate to reduce file size for easy sharing. All processing happens locally in your browser—no files are uploaded to servers, completely free.
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点击选择，或把音频拖到这里
压到指定大小或指定码率，减小音频体积 · 全程本地处理，不上传服务器
FAQ
Can I compress to a specific size?
Yes. Select "Compress to specific size" and enter the target MB/KB; the tool will estimate the appropriate bitrate based on duration. The result is approximate, so actual size may vary slightly.
How to choose bitrate?
64–96 kbps is sufficient for speech; music should be 128 kbps or higher. M4A (AAC) typically sounds clearer than MP3 at the same bitrate.
Will sound quality be lost?
Lossy compression removes some detail; lower bitrates mean smaller files but more quality loss. Balance based on your needs.
Are files uploaded?
No. All compression is done entirely in your browser—audio never leaves your device.
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