Your files stay on your Mac.
Convertessa reads your Ogg (.ogv) video files and re-encodes them as MPEG — a format accepted by a wide range of players, editors, and devices. The conversion runs entirely on your Mac; your footage never touches a server. Because MPEG is a lossy format, you can set quality to balance file size against visual fidelity before converting.
Drag one .ogv file or an entire folder into Convertessa. Batch mode processes every Ogg file in the folder in a single pass.
Pick MPEG from the output format list, then use the quality slider to set the output quality level that fits your needs.
Click Convert. Convertessa re-encodes each file locally — nothing is uploaded. Your MPEG files land in the same folder when done.
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.
MPEG is a lossy format, so some quality loss is inherent to the encoding. Convertessa lets you set the quality level before converting, giving you direct control over the trade-off between file size and visual fidelity.
Yes. Drop a folder onto Convertessa or run convertessa ./folder/ --to mpeg and every Ogg file inside is converted in one batch — no need to process files one by one.
No. Convertessa runs entirely offline on your Mac. Your Ogg files are never uploaded — conversion happens locally and your footage stays private.