Your files stay on your Mac.
Matroska MKV bundles video, audio, and subtitle tracks into a single container file. Converting to Ogg Vorbis pulls out the audio track and re-encodes it using the open Vorbis codec — compatible with browsers, media players, and game engines that favour royalty-free formats. Set the quality level to control how aggressively Vorbis compresses the audio.
Drag one MKV file onto Convertessa, or drop an entire folder to queue every MKV inside it for batch conversion.
Choose Ogg Vorbis from the output list, then set the quality level to balance file size against audio fidelity.
Click Convert. Convertessa extracts the audio track and writes an .ogg file for each input — no upload, no server, nothing leaves 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.
Yes. Convertessa removes embedded tags and metadata from the output file, leaving a clean Ogg Vorbis audio file.
Yes. Drop a folder onto Convertessa and it queues every MKV inside. On the command line, run convertessa ./videos/ --to ogg to process the whole directory in one pass.
Completely. Convertessa runs entirely offline — your MKV files are processed on your Mac and never uploaded anywhere.