Your files stay on your Mac.
MXF is a professional broadcast container that packages video and audio tracks into a single file used in cameras and editing suites. Converting to Opus extracts the audio stream and encodes it to the open Opus format, giving you a compact file you can use anywhere Opus is supported. Convertessa reads the MXF container directly on your Mac — no upload, no internet connection required.
Drag one MXF file or an entire folder of MXF files onto Convertessa. Batch mode processes every file in the folder in one pass.
Choose Opus from the output format list. Set quality to control the balance between file size and audio fidelity — useful when you need to hit a specific size target.
Click Convert. Convertessa reads each MXF container, extracts the audio, and writes an Opus file beside the original. Resolution and timing are preserved exactly as recorded.
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. Convertessa removes embedded metadata — including camera and location tags — from the output Opus file during conversion.
Yes. Pass the folder path to Convertessa and every MXF file inside is converted to Opus in a single batch run, either in the app or via convertessa /path/to/folder/ --to opus in the terminal.
Convertessa converts the primary audio track from each MXF file. Multi-track mixing and track selection are not currently supported.