Your files stay on your Mac.
AIFF and WAV both store uncompressed PCM audio — converting between them rewrites the file container without touching the audio data. The resulting WAV files work with Windows software, DAWs, and hardware that expects Microsoft's format. Because no encoding step is involved, there is no quality loss.
Drag a single file or an entire folder into Convertessa. Batch mode queues every AIFF file at once so you don't process them one by one.
Choose WAV from the output format list. Because AIFF and WAV are both lossless PCM containers, no additional settings are needed.
Convertessa rewrites each container on your Mac — nothing is uploaded to any server. Your WAV files are ready in seconds, resolution preserved.
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. AIFF and WAV both store uncompressed PCM audio data. Converting between them changes the container only — the audio samples are bit-for-bit identical in the output.
No. Convertessa runs entirely on your Mac. Your AIFF files never leave your device at any point during the conversion.
Yes. Drop a folder onto Convertessa or pass the folder path with --to wav in the CLI. Every AIFF file inside is converted in one pass.