Your files stay on your Mac.
3FR is Hasselblad's proprietary RAW format, storing unprocessed sensor data at full bit depth. Converting to TIFF produces a lossless, widely-compatible raster file—no pixel data is discarded. Convertessa runs entirely on your Mac; nothing is uploaded.
Drag a single 3FR file or an entire folder into Convertessa. Batch mode processes every 3FR in the folder in one pass.
Select TIFF from the output format list. Because TIFF is lossless, every tonal value from the original RAW capture is retained exactly.
Click Convert. Convertessa writes TIFF files alongside the originals. No internet connection required—files never leave 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.
No. TIFF is a lossless format, so every pixel value from the original Hasselblad RAW file is preserved. Resolution is not changed.
Yes. Convertessa removes embedded EXIF and metadata during conversion, so the output TIFF contains no camera or location information.
Yes. Drop a folder onto Convertessa or run convertessa ./folder --to tiff in the terminal to batch-convert every 3FR file in one pass.