Your files stay on your Mac.
Phase One IIQ files store full-sensor data captured by Phase One and Mamiya medium-format cameras. Convertessa decodes the raw sensor information and writes a standard JPG, letting you set quality to balance file size against image detail. Resolution is preserved, and EXIF metadata is stripped on export.
Drag one IIQ file or an entire shoot folder onto Convertessa. Files never leave your Mac — all decoding runs offline.
Pick JPG from the output format list, then set quality to control the balance between file size and image detail.
Click Convert. Convertessa decodes every IIQ file and writes JPGs at the quality you chose, preserving resolution and stripping EXIF metadata from each output file.
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.
Yes. Pass the folder path to the CLI — convertessa ./shots/ --to jpg — or drag the folder onto the app. Convertessa processes every IIQ file inside and writes the JPGs alongside the originals.
Yes. Convertessa preserves the full resolution decoded from the IIQ data when writing the JPG. No alteration to the pixel count occurs during conversion.
Yes. Convertessa strips EXIF and other embedded metadata from every output JPG, so camera model, GPS coordinates, and shooting parameters are not carried over.