Your files stay on your Mac.
WMA is a proprietary lossy format; converting to WavPack decodes the audio and stores every surviving sample in WavPack's open, lossless container. No further generation loss is introduced. Convertessa runs entirely on your Mac — your files never leave the machine.
Drag one file or an entire folder of .wma files onto Convertessa. Batch conversion processes every file in one pass.
Choose WavPack from the output format list. The target extension will be .wv.
Click Convert. Convertessa decodes each WMA file and writes a lossless .wv file beside the original. No upload, no cloud — everything stays on your Mac.
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.
No. WMA is a lossy format, so any audio data discarded during the original encoding cannot be recovered. WavPack preserves every sample that survived the WMA encoding without introducing additional loss.
WavPack is an open format with broad playback and archiving tool support, while WMA is proprietary to Microsoft. Converting lets you store audio in a vendor-neutral container with no further quality degradation.