Your files stay on your Mac.
Converting MPEG to Matroska MKV places your video and audio streams inside the MKV container, which supports multiple tracks, embedded subtitles, and chapter markers. Convertessa runs entirely on your Mac — nothing is uploaded. You can set output quality and process whole folders in one pass.
Drag a single .mpeg file or an entire folder onto Convertessa. Batch mode picks up every MPEG in the folder automatically.
Choose Matroska MKV from the output format list. Set quality to dial in the balance between file size and visual fidelity.
Click Convert. Convertessa works locally — files never leave your Mac. The MKV output lands alongside your source files.
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 on your Mac. Your files are never sent to a server or third-party service.
Yes. Convertessa strips embedded metadata from the output file, so the resulting MKV is clean of unwanted tags.
Yes. Drag the folder onto Convertessa or run convertessa ./folder --to mkv in your terminal to process every MPEG file in one pass.