Your files stay on your Mac.
iTunes M4V is Apple's video container — structurally close to MP4 but tied to Apple's ecosystem and its players. Converting to MP4 produces a standard file any player, editor, or device can open without iTunes. Convertessa rewraps the video stream locally, preserving resolution and letting you set output quality.
Drag one file or an entire folder of M4V videos into Convertessa. Batch conversion processes every file in one pass.
Choose MP4 from the output format list. Set quality to balance file size against fidelity — useful when converting large libraries.
Convertessa converts entirely on your Mac. Files never leave your device and no internet connection is required.
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 converts the video stream as-is and does not bypass DRM. Non-DRM M4V files — such as those you ripped yourself or downloaded DRM-free — convert cleanly to MP4.
MP4 is a lossy format, so re-encoding involves some generation loss. Use the quality slider before converting — higher quality preserves more detail at the cost of a larger file.
Yes. Drop a folder into Convertessa or run convertessa /path/to/library --to mp4 in the terminal. Every M4V inside the folder is converted in one batch.