Your files stay on your Mac.
AMR (Adaptive Multi-Rate) is a compressed audio format designed for voice — the default recording codec on many mobile phones and VoIP apps. Convertessa reads .amr files locally and converts them to 14 audio formats, including MP3, AAC, FLAC, and WAV. Nothing is uploaded; the entire conversion runs on your Mac.
Drag a single .amr file into Convertessa, or drag a folder to queue every AMR file inside for batch conversion.
Choose MP3, AAC, WAV, FLAC, or any of the 14 supported targets from the output list. Because AMR is a lossy format, you can also set the output quality when converting to a lossy target such as MP3 or AAC.
Click Convert. Convertessa writes the output files to your Mac. No upload, no account, and no internet connection required.
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 reads standard AMR files regardless of which device created them. Drop the file in, choose a target format from the output list, and convert — no extra drivers or companion apps needed.
No. AMR is a lossy codec optimised for voice — quality discarded during the original recording cannot be restored. Converting to FLAC or WAV places the existing audio in a lossless container, which is useful for archiving or compatibility but does not improve fidelity.
Yes. Convertessa converts files entirely on your Mac. Your .amr files are never uploaded to a server, and no internet connection is needed at any point during conversion.