Your files stay on your Mac.
Convertessa decodes each AMR voice recording and re-encodes it as an AAC audio file. Everything runs locally — files never leave your Mac. You can set quality and process a whole folder at once.
Drag one AMR file or an entire folder into Convertessa. No upload required — conversion runs entirely on your Mac.
Pick AAC from the output format list. Set quality to control how the encoder balances fidelity and file size.
Click Convert. Convertessa decodes each AMR track and writes an AAC file alongside the original.
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. Convertessa converts entirely offline. Your voice recordings are never uploaded to any server.
Yes. Use the quality control before converting to adjust how the AAC encoder balances audio fidelity and file size.
Yes. Drop a folder onto Convertessa and it converts every AMR file inside to AAC in a single batch.