Your files stay on your Mac.
iTunes M4V is a standard or DRM-wrapped MPEG-4 video container. Converting to Apple M4A extracts the audio track and packages it as a standalone MPEG-4 audio file — useful for music, audiobooks, or recorded performances stored inside a video file. Convertessa processes everything locally; your files never leave the Mac.
Drag one M4V file or an entire folder into Convertessa. The app queues every M4V it finds.
Choose Apple M4A from the output format list, then set quality to control how much detail the lossy encoding retains.
Click Convert. Each M4A file is written alongside its source; the original M4V is left untouched.
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.
Yes. Drop a folder onto Convertessa and it queues every M4V inside. From the command line, run convertessa ~/Movies/*.m4v --to m4a to batch-convert in one pass.
M4A uses lossy AAC encoding, so the quality slider controls how much audio detail is preserved. Higher settings produce larger files that stay closer to the original track; lower settings reduce file size at the cost of some fidelity.
No. Convertessa runs entirely on your Mac — all conversion happens locally and your files never leave the machine.