Audio Converter
Use this to turn an iPhone voice memo (M4A) into MP3, convert a FLAC archive into MP3 for portable players, shrink WAV studio recordings as OPUS, or migrate old WMA files to modern formats.
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 turn an iPhone voice memo (M4A) into MP3, convert a FLAC archive into MP3 for portable players, shrink WAV studio recordings as OPUS, or migrate old WMA files to modern formats.
How to use it
- 1Drag audio files into the list.
- 2Pick a Target Format.
- 3Set Audio Quality, Sample Rate and Channels.
- 4Click Run.
Use cases
iPhone voice memos into MP3
Add the M4A files, Target MP3, 192k, Auto sample, Auto channels, run.
FLAC archive into phone-friendly MP3
Add the FLACs, Target MP3, 320k, run. High quality on the go.
Compress podcasts as OPUS
Add the podcasts, Target OPUS, 64k, Mono, run. Tiny files.
Old WMA music into FLAC
Add the WMAs, Target FLAC, Auto, run.
Frequently asked questions
Is Audio Converter 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.