Audio Compressor
Use this to fit big WAV files into email, cut disk usage on a podcast archive, or shrink recordings before uploading them to a transcription service.
Free to download, install and update. No signup; all 76 tools are free within daily limits, Pro only lifts the limits.
What it does
Use this to fit big WAV files into email, cut disk usage on a podcast archive, or shrink recordings before uploading them to a transcription service.
How to use it
- 1Drag audio files into the list.
- 2Pick an Optimization Profile (easiest path).
- 3Or set Target Bitrate and Sample Rate manually.
- 4Click Run.
Use cases
Archive a podcast
Add stereo podcasts, Balanced profile, run. Files drop by around 60%.
Email a big WAV
Add the WAV, Aggressive profile, run. Output is very small.
Shrink recordings for transcription
Add the recordings, manual Bitrate 64, Sample Rate 16000, run. Tiny files, still enough for AI transcription.
Trim down a music collection
Add the MP3s, Bitrate 192, Sample Rate 44100, run.
Frequently asked questions
Is Audio Compressor free?
Yes. Downloading, installing and updating BulkPro is free and requires no signup. All 76 tools work for free within daily usage limits; Pro plans only lift the daily limits of the modules you pick.
Local processing
Runs on your CPU/GPU. No file leaves your machine.
Batch ready
Process dozens or thousands of files in one run.
Part of BulkPro
Bundled with 76 tools across 7 modules: one install, one app.
Full UI reference, step-by-step workflows, edge cases
Every input, button, and behavior documented for advanced users.