Your files stay on your Mac.
Convertessa reads the audio track from your iTunes M4V file and re-encodes it as TTA, a lossless format that stores every sample exactly as recorded. No audio data is discarded in the process. Everything runs locally — your files never leave your Mac.
Drag a single M4V file or an entire folder into Convertessa. Batch conversion processes all files in one pass.
Pick TTA from the output format list. Convertessa will extract the audio track and encode it as lossless TTA.
Click Convert. Your TTA files are written to the destination folder with the audio preserved sample-for-sample.
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. TTA is a lossless format, so every audio sample from the original M4V is preserved exactly. The output is bit-for-bit identical to the source audio.
Yes. Drop the folder into Convertessa or use the CLI batch form — convertessa /folder/*.m4v --to tta — and every M4V in the folder is converted in one run.
Convertessa strips embedded metadata during conversion, so the resulting TTA files contain only the audio stream without the original M4V tags.