Your files stay on your Mac.
Ogg video (OGV) is an open-source container common in Linux and web workflows, but iTunes and Apple devices expect the M4V format. Convertessa re-encodes your OGV files into iTunes-compatible M4V so they play natively and sync without issues. Every step runs on your Mac — nothing is uploaded, and resolution is preserved exactly.
Drag one OGV file or an entire folder onto Convertessa. Batch mode processes every Ogg video in the folder in a single pass — no need to queue files one by one.
Select iTunes M4V from the output format list. Because M4V uses lossy compression, you can also set quality to balance playback fidelity against file size before converting.
Click Convert. Convertessa encodes locally with no internet connection required. Files never leave your Mac, and the output M4V lands in the same folder as your originals.
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. Convertessa runs entirely offline on your Mac. Your Ogg video files are never sent to a server or cloud service — conversion is local from start to finish.
Yes. Drop an entire folder onto Convertessa and it converts every Ogg video inside it to iTunes M4V in one batch. You can also use the CLI: convertessa /path/to/folder/ --to m4v.
Yes. Convertessa strips embedded metadata from the source file during conversion, so the output M4V contains no leftover EXIF or metadata from the original OGV.