Your files stay on your Mac.
Minolta RAW (.mrw) is the proprietary camera raw format produced by Konica Minolta DSLRs, storing full-sensor image data at original capture fidelity. Convertessa reads .mrw files directly on your Mac and converts them to standard image formats—no cloud upload, no account required. Drop a single file or point the CLI at a folder to process an entire shoot at once.
Drag a .mrw file—or an entire folder of raw files—onto Convertessa. The app reads everything locally; nothing leaves your Mac.
Pick the output format from the list: AVIF, JPG, PNG, TIFF, or WebP. Convertessa preserves the full original resolution in every output.
Click Convert. Output files land in the folder you choose, with EXIF and metadata stripped from every image.
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.
Convertessa converts .mrw files to AVIF, JPG, PNG, TIFF, and WebP. Pick your target format in the app, or pass --to <format> on the command line.
No. Convertessa runs entirely on your Mac. Files are never uploaded, and no internet connection is needed at any point during conversion.
Yes. Drag a folder onto Convertessa to batch convert every .mrw file inside, or use convertessa ./folder/ --to jpg from the terminal to process the whole directory in one command.