Your files stay on your Mac.
Converting DTS to AAC re-encodes the DTS bitstream into an AAC file that plays natively on Apple devices, streaming platforms, and standard media players. Because AAC is lossy, you set quality before converting to control the balance between file size and fidelity. Every file is processed locally — nothing leaves your Mac.
Drag a single DTS file or an entire folder of tracks into Convertessa. The app queues every DTS file it finds, ready to convert in one pass.
Pick AAC from the output format list. Set quality to dial in the fidelity-to-file-size balance that suits your project — higher quality means a larger but more faithful AAC encode.
Click Convert. Convertessa processes every file on your Mac — no internet connection required, no files uploaded. Converted AAC files appear 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.
Yes. Convertessa runs entirely offline. No audio data is sent to any server or cloud service — conversion happens on your Mac from start to finish.
Yes. Drop a folder onto Convertessa, choose AAC, and every DTS file inside is converted in one pass. From the command line, run convertessa /path/to/folder --to aac for the same result.
Use the quality slider before converting. A higher setting preserves more of the original DTS audio at the cost of a larger file; a lower setting reduces file size with some loss in fidelity. AAC is a lossy format, so this setting is the primary way to tune the output.