Your files stay on your Mac.
Converting iTunes M4V to AAC pulls the audio track out of the video container and writes it as a standalone AAC file. You set the quality level to balance fidelity against file size. Everything runs on your Mac — no upload, no account, no internet connection required.
Drag one M4V file or an entire folder into Convertessa. All files are queued and processed locally — nothing is sent anywhere.
Pick AAC from the output format list, then set your preferred quality level before converting.
Click Convert. Convertessa encodes the audio track and saves each AAC file alongside its source.
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.
Convertessa re-encodes the audio stream to AAC so you can control the output quality level. The video track is discarded entirely; only the audio is written to the output file.
Yes. Drop a folder onto Convertessa and every M4V inside is queued automatically. From the command line, run convertessa /path/to/folder --to aac to batch convert without opening the app.
Yes. Convertessa strips embedded metadata from the output AAC files, leaving clean audio without leftover tags carried over from the source M4V.