Your files stay on your Mac.
MXF is a professional container used by Sony, Canon, and Panasonic cameras — not accepted by most web players or editors. Converting to WebM gives you a browser-native file you can embed or share without sending footage to a server. Convertessa does the whole job on your Mac: no upload, no size limit, no waiting.
Drag one clip or an entire folder of MXF footage into Convertessa. You can mix clips from different cameras in a single batch.
Choose WebM from the output format list. Set quality to balance file size against visual fidelity — higher quality retains more detail, lower quality produces smaller files.
Click Convert. Convertessa processes every clip locally — files never leave your Mac — and saves the WebM files alongside 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.
WebM is a lossy format, so some quality is traded for smaller file sizes. Use the quality setting in Convertessa to control that tradeoff. For archival purposes, keep your original MXF files.
No. Convertessa preserves the original resolution of your MXF footage — only the container and codec change.
Yes. Drop a folder into Convertessa or run convertessa /path/to/folder --to webm in Terminal to batch-convert every MXF file in one pass.