Your files stay on your Mac.
OGV is Ogg's video container, bundling video and audio streams in the open Ogg format. Converting to AAC extracts the audio track and re-encodes it as a standalone AAC file — broadly compatible with Apple devices, web players, and media libraries. Convertessa does all of this locally on your Mac; your files never leave the machine.
Drag one OGV file or an entire folder into Convertessa. The app queues every Ogg file in the batch without uploading anything to the internet.
Pick AAC from the output format list. Use the quality slider to set the AAC encoding quality before you convert.
Click Convert. Convertessa processes every file locally and saves the AAC output alongside the originals — or to any folder you choose.
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 OGV files are never sent to a server or cloud service — the conversion happens locally every time.
Yes. Because AAC is a lossy format, Convertessa lets you set quality before converting. Higher quality produces a larger file; lower quality reduces file size at the cost of some fidelity.
Yes. Drop a folder onto Convertessa or pass a directory with convertessa /path/to/folder --to aac on the command line. Every OGV file in the folder is converted in one batch.