Your files stay on your Mac.
Convertessa reads Hasselblad FFF RAW files and writes each frame as a lossless PNG — no compression artefacts, no quality loss. EXIF and embedded metadata are stripped in the process. Everything runs locally; your proprietary RAW files never leave the Mac.
Drag a single .fff file or an entire folder of Hasselblad RAW files onto Convertessa. Batch conversion processes every file in one pass.
Choose PNG from the output format list. Convertessa writes a lossless PNG for each source file, preserving the full pixel resolution.
Click Convert. Each FFF file becomes a PNG in the same folder. No upload, no account — conversion runs entirely on your Mac.
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. Convertessa preserves the full pixel resolution of the Hasselblad RAW file. No resampling is applied.
No. Convertessa strips EXIF and embedded metadata from the output PNG. This is always the case for image conversions — there is no option to retain metadata.
Yes. Drop a folder onto Convertessa or run convertessa ./shots/ --to png from the command line. Every .fff file in the folder is converted in one pass.