Your files stay on your Mac.
Convertessa decodes each Windows Media Audio track and writes it as uncompressed PCM WAV. Every file stays on your Mac — nothing is uploaded and no internet connection is required. Drop a single track or an entire folder and get standard WAV files ready for any DAW, editor, or playback app.
Drag one WMA file or a whole folder onto Convertessa. The app lists every track so you can review or reorder the queue before conversion begins.
Choose WAV from the output format list. Convertessa will decode each WMA track to uncompressed PCM WAV — no additional settings are needed.
Click Convert. Convertessa processes every file locally and saves the WAV output alongside your originals. No internet connection is required at any point.
Images, audio, video, documents, archives and eBooks — all converted natively, right on your Mac.
Pick a format you have — see everything Convertessa can turn it into.
Convert hundreds of files at once with per-type group defaults and individual overrides.
First-class support for HEIC, AVIF and WebP — encode and decode, both ways. Read JPEG XL and a dozen more modern formats too.
Drop files anywhere on the window. Native, instant, and exactly what you’d expect on a Mac.
Dial in compression, resolution and bitrate. Keep originals pristine or shrink for sharing.
Never overwrite a file by accident. Convertessa appends safe suffixes automatically.
Every job is logged locally. Re-run a previous conversion or revisit recent outputs in a click.
Bundle your converted files straight into a single ZIP, TAR or 7z — packaged and ready to share the moment a job finishes.
Right-click any file in Finder and choose Convert. A Quick Action handles it on the spot — no need to open the app first.
Shrink Convertessa to a tidy mini window that tucks into a corner — just a drop zone and a format picker for quick, one-off conversions.
No cloud. No account. No upload. Every conversion happens entirely on-device, using the power already in your Mac. What you convert is nobody’s business but yours.
Script conversions, wire them into your build, or batch a folder from the terminal. The same engine, no GUI required.
Read the full CLI documentation →Shrink Convertessa down to a small, focused window — drop, convert, done, with your recent conversions one click away.
macOS 14+ · Apple Silicon & Intel
New formats, new features, and fixes — every release, on the record.
WAV stores audio as uncompressed PCM, so the output faithfully represents what is in the WMA file. WMA is a lossy format, meaning some audio data was discarded at encoding time — converting to WAV preserves the decoded audio exactly, but cannot recover what the original encoder removed.
Yes. Drop any folder onto Convertessa and every WMA file inside is queued automatically. From the command line, run convertessa /path/to/folder --to wav to process an entire directory without opening the app.
No. Convertessa runs entirely on your Mac. Your audio files never leave your machine and no internet connection is needed to convert WMA to WAV.