Your files stay on your Mac.
Both FLAC and TTA are lossless codecs, so every sample survives the conversion bit-for-bit. TTA uses adaptive linear prediction to store audio in a compact, seekable stream. Convertessa reads your FLAC files and writes TTA output entirely on your Mac — nothing is uploaded.
Drag one file or an entire folder of FLAC tracks into Convertessa. Batch mode processes all of them in one pass.
Pick TTA from the output format list. Convertessa targets the TTA lossless codec and writes one .tta file per input track.
Click Convert. Convertessa works locally — files never leave your Mac and metadata is stripped from the output files.
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. Both formats are lossless, so the conversion is mathematically exact. Every sample in the TTA output is identical to the original FLAC source.
Yes. Drop a folder onto Convertessa or run convertessa /your/album --to tta in the terminal. Every FLAC file in the folder is converted in a single batch.
No. Convertessa strips metadata from the output files during conversion.