Your files stay on your Mac.
Convertessa rewraps your MP4 video into the M4V container Apple uses for iTunes and Apple TV. The video and audio streams are re-encoded so the file plays natively in iTunes, on Apple TV, iPhone, and iPad. Use the quality setting to balance visual fidelity against file size.
Drag one MP4 or an entire folder into Convertessa. Every file stays on your Mac — nothing is uploaded to any server.
Select iTunes M4V from the output format list. Optionally set quality to control how the video is re-encoded.
Click Convert. Convertessa processes each file and saves the M4V results alongside your originals.
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. M4V is the native video format iTunes and Apple TV expect. After conversion the file is ready to add to your iTunes library and sync to Apple devices.
The video is re-encoded, so quality depends on the setting you choose. Higher quality preserves more detail but produces a larger file; lower quality reduces file size at the cost of some fidelity.
Yes. Drop a folder onto Convertessa or run convertessa /path/to/folder/ --to m4v to batch-convert every MP4 in that folder in one pass.