Your files stay on your Mac.
CR3 is Canon's current RAW format — it stores full sensor data at the original resolution captured by the camera. Converting to JPG produces a compact, widely-compatible file ready to share, post, or archive. Convertessa decodes each CR3 directly on your Mac and writes a JPG at the quality level you choose, with no upload and no cloud processing.
Drag one CR3 or an entire folder of CR3 files onto Convertessa. Batch mode processes every file in the folder in a single pass.
Choose JPG from the output format list. Use the quality slider to balance file size against image detail — higher values stay closer to the source data.
Click Convert. Convertessa decodes each CR3 and writes a full-resolution JPG locally. No file ever leaves 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 removes all EXIF and embedded metadata from the output JPG. If you need to retain metadata, preserve it in your photo editor or DAM before converting.
Yes. Drop a folder onto Convertessa or run convertessa ./folder --to jpg in the terminal. Every CR3 in the folder is converted in one batch.
80–90 is a solid starting point for sharing and archiving. Lower values produce smaller files with more visible compression artefacts; higher values produce larger files that look closer to the source CR3.