Your files stay on your Mac.
Convertessa reads MPEG video and audio files and writes the audio stream as Ogg Vorbis — an open, patent-free format supported across browsers and media players. Because Ogg Vorbis is a lossy codec, you can set the quality level before converting to balance file size and fidelity. Every step runs locally; no file ever leaves your Mac.
Drag one MPEG file or an entire folder onto Convertessa. Batch mode queues every MPEG it finds so you convert them all in one pass.
Choose Ogg Vorbis from the output format list. Use the quality slider to set the target quality level — higher values produce larger files with better fidelity.
Click Convert. Convertessa processes every file on your Mac and saves the Ogg Vorbis files alongside the originals. 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. Ogg Vorbis is a lossy format, so Convertessa lets you set a quality level before converting. A higher quality value preserves more detail at the cost of a larger file; a lower value shrinks the file at the cost of some fidelity.
No. Convertessa runs entirely on your Mac. Your MPEG files are read and written locally — nothing is sent to a server or cloud service at any point during conversion.
Yes. Drop a folder onto Convertessa and it queues every MPEG file inside. From the command line, point the CLI at a directory: convertessa /path/to/folder --to ogg.