Your files stay on your Mac.
TTA is a lossless audio codec; Apple CAF is the native container format for audio on macOS and iOS. Converting your TTA files to CAF makes them readable by Core Audio, QuickTime, and any Apple framework that expects a standard system format — no third-party codec required. Every sample is preserved exactly: lossless in, lossless out.
Drag one TTA file or an entire folder into Convertessa. The app reads TTA's lossless stream directly — no intermediate decode step needed.
Pick Apple CAF from the output list. Convertessa will wrap the lossless audio in a CAF container that macOS and iOS recognise natively.
Click Convert. Convertessa writes the CAF files beside your originals (or to a folder you choose). Processing happens entirely on your Mac — nothing is uploaded.
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.
No. TTA is a lossless codec, and CAF supports lossless audio. Convertessa moves the audio stream into the CAF container without re-encoding, so every sample is bit-for-bit identical to the source.
Apple's built-in frameworks — Core Audio, AVFoundation, QuickTime — natively read CAF files without any third-party codec. If you're working on macOS or iOS development, or using apps that rely on system decoders, CAF is the format those tools expect.
Yes. Drag the folder onto Convertessa or run convertessa ./folder --to caf from the terminal. All TTA files in the folder are converted in one batch; other file types are left untouched.