Your files stay on your Mac.
TTA stores audio losslessly, which keeps every sample intact but produces large files. Converting to Ogg Vorbis encodes the audio in an open, patent-free lossy format that plays natively in browsers, game engines, and Linux media players. Set quality to control the trade-off between file size and audio fidelity.
Drag one TTA file or an entire folder of tracks onto Convertessa. All processing happens locally — nothing is uploaded.
Choose Ogg Vorbis from the output format list, then set the quality level that suits your needs.
Click Convert. Convertessa encodes every file on your Mac and saves the Ogg Vorbis output 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.
Ogg Vorbis is a lossy format, so some audio information is discarded during encoding. The TTA source is lossless, meaning the encoder receives bit-perfect input. Set a higher quality value to retain more detail; lower values produce smaller files.
Yes. Drop a folder onto Convertessa or point the CLI at a directory and every TTA file inside converts in one pass. The folder structure is preserved in the output.
Ogg Vorbis is patent-free and supported natively in Firefox, Chromium, most Linux distributions, and many game engines — no licensing restrictions required. It delivers comparable audio at similar file sizes without the IP overhead of MP3.