Your files stay on your Mac.
Leica RAW (.rwl) is the proprietary unprocessed sensor format produced by Leica digital cameras, preserving full tonal and color data straight from the sensor. Convertessa reads your .rwl files and converts them to AVIF, JPG, PNG, TIFF, or WebP directly on your Mac — no upload, no internet connection required. Drop a single file or an entire folder to process a whole shoot in one pass.
Drag a .rwl file — or a folder of Leica RAW files — into Convertessa. Batch mode processes every .rwl in the folder in a single pass, preserving the original resolution of each file.
Choose the output format from the list: AVIF, JPG, PNG, TIFF, or WebP. Each converted file is written alongside its original.
Hit Convert. Convertessa processes your files locally with no upload and no account required. EXIF metadata is stripped from every 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.
No. Convertessa runs entirely on your Mac. Your .rwl files are never uploaded to any server — conversion happens locally with no network access required.
Convertessa converts .rwl files to AVIF, JPG, PNG, TIFF, and WebP. Choose the target format from the output list before you convert.
Yes. Drop a folder into Convertessa and every .rwl file inside is converted in one batch — no need to add files one by one. Use convertessa ./folder/ --to jpg from the command line for the same result.