Your files stay on your Mac.
Convertessa decodes Kodak DC RAW (.kdc) files and writes lossless TIFF images, preserving every pixel at the camera's native resolution. The conversion runs entirely on your Mac — no upload, no account, no internet connection required. Batch-convert a whole folder of KDC files in a single pass.
Drag one KDC file or an entire folder onto Convertessa. The app reads Kodak's proprietary RAW sensor data directly, with no intermediate upload or cloud processing.
Choose TIFF from the output format list. TIFF stores decoded pixel data without lossy compression, making it the right target when you need a fully editable, lossless master file.
Click Convert. Convertessa processes every file locally and saves the TIFF images to the destination folder you specify, at the original capture resolution.
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. TIFF stores pixel data without lossy compression, so the output is a full-fidelity representation of the decoded RAW image at its original resolution.
Yes. Convertessa strips EXIF and other embedded metadata from the TIFF output, keeping the converted file clean of camera model, lens, and location data.
Yes. Pass the folder path to the CLI — convertessa ./photos/ --to tiff — or drop the folder onto the app window to batch-convert every KDC file inside in one go.