Your files stay on your Mac.
Convertessa decodes each MPEG audio stream and re-encodes it into WavPack's lossless container, preserving the decoded audio exactly — no further quality loss after the initial decode. Whole folders convert in one pass. Files never leave your Mac.
Drag a single MPEG file or an entire folder onto Convertessa. Batch mode queues every MPEG file in the folder automatically.
Choose WavPack from the output format list. Convertessa will decode the MPEG stream and write each track into a lossless WavPack file.
Click Convert. WavPack files appear in the output folder — audio preserved at the decoded quality, metadata stripped, nothing uploaded.
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 is lossless, so it preserves the decoded MPEG audio exactly with no additional degradation. Quality is bounded by the original MPEG encoding; the conversion does not restore information already discarded during MPEG compression.
Yes. Convertessa strips embedded metadata from the output file during conversion, retaining only the raw audio stream.
Yes. Drop a folder onto Convertessa or use the CLI: convertessa /path/to/folder --to wv. Every MPEG file in the folder is converted in one pass.