Your files stay on your Mac.
Convertessa reads your Ogg audio and rewrites it as Apple CAF—Apple's Core Audio Format for macOS and iOS. Nothing is uploaded; every file stays on your Mac. Drop a single track or an entire folder and convert in one pass.
Drag one .ogv file into Convertessa or drop a whole folder to queue multiple files at once.
Choose Apple CAF from the output list. Convertessa will write a .caf file for each source track.
Click Convert. Convertessa processes every file locally—no internet connection required—and saves the .caf files alongside the originals.
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.
Apple CAF is a container that supports lossless audio, so the conversion preserves your audio data without introducing additional quality loss.
Yes. Drop a folder onto Convertessa or run convertessa *.ogv --to caf from the command line to convert every Ogg file in one pass.
No. Convertessa runs entirely on your Mac. Your Ogg files are never uploaded anywhere—conversion happens locally with no internet connection required.