Your files stay on your Mac.
Convertessa reads your .muse files and produces valid JATS XML, the tag set used by scholarly journals and manuscript submission systems. Headings, paragraphs, lists, and inline markup are mapped to the corresponding JATS elements. The entire conversion runs on your Mac — no file is ever uploaded.
Drag one .muse file or an entire folder of files onto Convertessa. The app lists each document ready for conversion.
Choose JATS XML from the output format list. Convertessa maps each Muse document to well-formed JATS XML.
Click Convert. Convertessa writes a .xml file alongside each source document. Nothing 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. Drop a folder onto Convertessa or run convertessa ./folder/ --to jats on the command line. Every .muse file inside is converted in one pass, preserving the folder structure in the output.
No. Convertessa converts entirely on-device. No file is uploaded to any server at any point.
Headings, paragraphs, ordered and unordered lists, inline emphasis, and links are all mapped to their JATS equivalents. Elements without a direct JATS counterpart are carried through as generic <sec> or <p> content.