Your files stay on your Mac.
Convertessa pulls the audio track out of each iTunes M4V file and writes it as a lossless WavPack (.wv) file. Every audio sample is preserved exactly — nothing is re-encoded at lower fidelity. Your files never leave your Mac.
Drag one M4V file or an entire folder into Convertessa. Batch mode picks up every M4V in the folder and queues them all at once.
Pick WavPack from the output format list. Convertessa will extract the audio track from each video and write a lossless .wv file.
Click Convert. Convertessa runs entirely on your Mac — no internet connection required, no files uploaded, no waiting on a remote server.
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. WavPack is a lossless format. Convertessa preserves every audio sample from the original M4V exactly — nothing is discarded or re-encoded at lower fidelity.
Yes. Convertessa removes embedded metadata tags from the .wv output, leaving you a clean audio file without private or identifying information carried over from the original M4V.
Yes. Drop a folder into Convertessa or run the CLI batch command and every M4V file inside is converted to WavPack in a single pass — no need to process files one by one.