Audio Compressor

Compress audio file size with optimized MP3 encoding and optional mono downmixing. See real before and after file sizes with exact percentage savings. Typical uses include compressing podcast episodes for sharing, reducing voice memo file size for email attachment, and downsizing large audio libraries.

Audio Compressor reads the supplied input in the current browser session and applies the selected operation locally. Its controls cover multiple compression presets (64k, 96k, 128k, 160k), optional stereo-to-mono downmixing for 50% extra size reduction, accurate before/after byte savings calculation, and fast client-side MP3 encoding.

Processing speed depends on your local device CPU and hardware acceleration. Operates within client browser memory with zero server uploads. Processing speed and format support depend on the browser, device memory, and source file. Keep the original material supplied to Audio Compressor until its compressed Audio has been checked for the intended use.