Your files stay on your Mac.
MXF is a broadcast container that bundles video, audio, and metadata tracks together. Converting to Apple M4A pulls the audio stream out and wraps it in an AAC-based file that plays natively on every Apple device and app. The conversion runs entirely on your Mac — files never leave your machine.
Drag one MXF file or an entire folder of MXF footage onto Convertessa. Batch mode processes every file in one pass.
Pick Apple M4A from the output format list. Because M4A uses lossy AAC encoding, you can set quality before converting.
Click Convert. Convertessa extracts the audio track and writes an M4A file alongside each original. Nothing is uploaded — everything happens offline on your Mac.
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 never leave your machine — no upload, no cloud processing, no account required.
Yes. Drop a folder onto Convertessa or run convertessa ./footage --to m4a in the terminal. Every MXF file in the folder is converted in one pass.
Because M4A uses lossy AAC encoding, Convertessa lets you set the quality level before converting. Higher quality produces a larger file; lower quality produces a smaller one.