Your files stay on your Mac.
Converting a Rich Text file to ICML packages your styled text as Adobe InCopy markup, ready to place in an InDesign layout. Convertessa maps RTF paragraph and character styles to their ICML equivalents and strips document metadata in the process. Everything runs locally on your Mac — no file is uploaded, no internet required.
Drag one .rtf file onto Convertessa, or point it at a folder to process an entire batch at once.
Choose ICML (InCopy) from the output format list. Convertessa queues each file for conversion at the quality level you set.
Convertessa writes one .icml file per source document. Open each directly in Adobe InCopy or place it into an InDesign layout.
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 maps named RTF paragraph styles and inline character styles to their ICML equivalents. Styles Convertessa cannot match are preserved as generic ICML character ranges so no text is dropped.
Yes — batch conversion is built in. Run convertessa ./folder --to icml and Convertessa writes one .icml file for every .rtf it finds in that folder.
Yes. Convertessa strips author, revision, and editor metadata embedded in the RTF before writing the ICML output. The conversion happens entirely on your Mac, so the metadata never leaves your machine in the first place.