Your files stay on your Mac.
A DVD VOB file bundles video, audio, and subtitle streams into a single container. Converting to Apple M4A extracts the audio track and encodes it as AAC inside an M4A wrapper. Convertessa handles every step locally — nothing leaves your Mac.
Drag one or more VOB files into Convertessa, or add an entire VIDEO_TS folder to process a full disc in one pass.
Select Apple M4A from the output list. Because M4A is a lossy format, you can also set quality to control the balance between file size and audio fidelity.
Convertessa extracts and encodes the audio track on your Mac. Output files appear in seconds — no upload, no waiting on a server.
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. Point Convertessa at a VIDEO_TS folder and it batch-converts every VOB file inside, producing one M4A per VOB.
Yes. M4A uses lossy AAC encoding, so you can set the quality level before converting to trade file size against audio fidelity.
No. Convertessa strips metadata during conversion — the output M4A contains only the raw audio stream.