Your files stay on your Mac.
Convertessa decodes each Opus file and re-encodes the PCM audio into WavPack's lossless container. No upload, no server—every file stays on your Mac. Drop a single track or an entire folder and convert in one pass.
Drag individual .opus files or a whole folder onto Convertessa. The app reads every file locally—nothing is uploaded.
Pick WavPack from the output list. Convertessa decodes each Opus stream and writes lossless .wv files, preserving the full decoded audio signal.
Click Convert. Convertessa processes every file in parallel and saves the .wv files alongside the originals or to a folder of your choice.
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. WavPack stores the decoded PCM data losslessly, so the .wv file is a bit-perfect capture of the Opus decode. Any reduction in quality from the original Opus encode is already in the signal and cannot be recovered.
Yes. Convertessa preserves the original sample rate and bit depth of the decoded Opus audio when writing WavPack output—no resampling or truncation occurs.
Yes. Drop a folder onto Convertessa or run convertessa /path/to/folder --to wv from the command line. Every .opus file in the folder is converted in one pass.