Your files stay on your Mac.
MXF is a professional broadcast container used by Sony, Panasonic, and Avid workflows — iTunes and Apple TV won't open it directly. Convertessa rewraps the video and audio streams into an M4V container that iTunes, Apple TV, iPhone, and iPad recognise natively. Your source footage stays on your Mac the entire time; nothing is uploaded.
Drag one MXF clip or an entire production folder onto Convertessa. The app queues every .mxf file it finds, including nested subfolders.
Choose iTunes M4V from the output format list. Because M4V uses lossy compression, you can set quality before converting — drag the slider or type a value to balance file size against visual fidelity.
Click Convert. Convertessa processes all queued files locally, preserving the original resolution of each clip. When it finishes, your M4V files are ready to import into iTunes or copy to any Apple device.
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. Convertessa runs entirely offline on your Mac. Your MXF files are read from disk, converted locally, and written back to disk — they never leave your machine.
Yes. M4V uses lossy compression, so Convertessa exposes a quality setting before you convert. A higher value preserves more detail at the cost of a larger file; a lower value shrinks the file at the cost of some fidelity.
Yes. Drop a folder onto Convertessa or pass a directory path with convertessa ./footage/ --to m4v and every MXF file inside — including subfolders — is queued and converted in one batch.