Your files stay on your Mac.
MP4 is a video container that bundles audio and video into a single file. Converting to WavPack extracts the audio track and stores it in a lossless format—every sample preserved exactly, with zero quality loss. The conversion runs locally; your files never leave the Mac.
Drag one MP4 file or an entire folder into Convertessa. All queued files are processed in one pass.
Choose WavPack from the output format list. Because WavPack is a lossless format, no quality setting is required or shown.
Click Convert. Convertessa extracts each audio track and writes a .wv file alongside the original. Nothing is uploaded—everything runs on your Mac.
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.
Only the audio track is written to the output file. The video stream is discarded. This conversion is for when you need the audio content of an MP4 in a lossless, archivable format.
Yes. WavPack encodes every audio sample exactly as it appears in the source. There is no quality degradation relative to the original audio track.
Yes. Drop a folder onto Convertessa or run convertessa /path/to/folder --to wv in the terminal. Every MP4 in the folder is converted in a single pass.