Your files stay on your Mac.
Convertessa decodes each Ogg Vorbis file to uncompressed PCM and writes a standard WAV — offline, with no upload. The original sample rate and channel layout are preserved. Run it on a single file or batch-process a whole folder at once.
Drag one .ogg file or an entire folder onto Convertessa. Mix as many files as you need — everything processes in one batch.
Choose WAV from the output format list. WAV is uncompressed, so there is no quality slider to adjust.
Click Convert. Convertessa decodes each file locally and saves a matching .wav beside the original. Nothing leaves 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.
No — WAV is uncompressed, so the output is exactly as clean as the Ogg source. What you gain is a universally supported container that every DAW, audio editor, and hardware player can open without an Ogg decoder.
Convertessa preserves the original sample rate and channel layout. A 48 kHz stereo Ogg file becomes a 48 kHz stereo WAV.
Yes. Drop a folder onto the app and every .ogg inside is converted in a single pass. From the command line: convertessa ./folder --to wav.