Your files stay on your Mac.
TTA (True Audio) is a lossless codec with limited player and software support. Converting to FLAC gives you bit-perfect audio in a format recognized by virtually every media player, DAW, and device. Sample rate and bit depth are preserved — no re-encoding artifacts.
Drag one TTA file or an entire folder into Convertessa. Everything runs locally — your audio never leaves your Mac.
Choose FLAC from the output format list. Because FLAC is lossless, no quality setting is needed.
Click Convert. Convertessa processes each file on your Mac and writes FLAC output at the original sample rate and bit depth.
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 TTA and FLAC are lossless formats, so every sample is reproduced exactly. The decoded FLAC audio is bit-for-bit identical to the original TTA.
Yes. Drag the folder onto Convertessa, or run the batch CLI command, and every TTA file in the folder is converted to FLAC in one pass.
No. Convertessa converts entirely on your Mac — no upload, no network required.