Audio Compressor

Speech uses 22.05 kHz mono at 16-bit, which keeps voices clear at a fraction of the size. Web uses 44.1 kHz stereo, the standard for music and general sharing. Game uses 48 kHz stereo, the usual rate for game engines and video. Archive uses 48 kHz at 24-bit for masters you want to keep.

Change the sample rate, channels or bit depth yourself and the preset switches to Custom. Reset in the Control Panel header puts everything back to the defaults.

When the goal is a number, an email attachment cap or an upload limit, turn on Aim for a target size and enter it in kilobytes. The compressor picks the bitrate to land near it.

The estimate in the Control Panel updates as you change settings, before anything is processed. The final size can differ slightly because every format adds a little overhead.

Select as many files as you like. They are listed in the Files card, each with its size before and after compression and the percentage saved, and the Control Panel totals the batch.

Download any file from its row, or all of them as one ZIP. Compression can be cancelled at any time.

Select a file and the preview plays it in the same player as ToolBuddy's other audio tools, with a waveform per channel, a level meter and a spectrum. After compressing, switch between Original and Result; the player stays at the same moment, so you hear exactly what changed.

Smaller always means less detail. Speech holds up well at low settings; for music, keep 128 kbps or higher, and use Archive or WAV when you will edit the audio again.

To change only the format without reducing quality, use the Audio Converter. To cut the file shorter first, use the Audio Trimmer or the Silence Remover.

To make a quiet recording louder before compressing it, use the Audio Normalizer, and to combine several clips into one file, use the Audio Joiner.