Your files stay on your Mac.
Converting WMA to FLAC decodes your Windows Media Audio files and re-encodes them into FLAC, a lossless open format. No further quality is lost beyond what the original WMA encoding introduced. Files never leave your Mac.
Drag one WMA file or an entire folder into Convertessa. Batch mode processes every WMA in the folder in one pass.
Pick FLAC from the output format list. Because FLAC is lossless, there are no quality trade-offs to configure.
Hit Convert. Convertessa writes FLAC files alongside your originals, preserving the source audio exactly as decoded. EXIF and embedded metadata are stripped from the output.
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 — and that's the honest answer. FLAC is lossless, but the WMA source is already lossy. Convertessa decodes the WMA faithfully and stores it in FLAC without adding any further loss, so what you get is a bit-perfect capture of whatever quality the WMA contained.
Yes. Point Convertessa at a folder and it will convert every WMA file inside in a single batch. Use convertessa ./folder --to flac from the command line, or drag the folder into the app.
No. Conversion runs entirely on your Mac. Your WMA files never leave your machine.