Your files stay on your Mac.
Minolta RAW (.mrw) files capture the full sensor output from Minolta digital cameras, but they're large and unsupported by most web browsers and apps. Converting to WebP produces a compact, widely supported image format with modern lossy compression. Convertessa runs entirely on your Mac — your files never leave your device.
Drag one .mrw file or an entire folder into Convertessa. Batch mode finds and processes every Minolta RAW file in the folder in one pass.
Choose WebP from the output format list. Set quality to balance file size against image fidelity — WebP is a lossy format, so lower values produce smaller files while higher values stay closer to the source.
Click Convert. Convertessa decodes the raw sensor data, strips EXIF metadata, and writes WebP files alongside your originals. Resolution is preserved exactly.
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 converts files locally on your Mac. Your .mrw files never leave your device — no upload, no internet connection required.
Quality 80–90 is a solid starting point — noticeably smaller than the raw source while keeping the image visually clean. Use lower values for web thumbnails and higher values when you need near-lossless output.
No. Convertessa strips EXIF and metadata during conversion. The output WebP contains image data only — no camera model, GPS coordinates, or capture settings are embedded.