Your files stay on your Mac.
Convertessa reads your Djot source files and writes JATS XML documents, mapping headings, paragraphs, lists, and inline markup to standard JATS publishing elements. The result is structured XML suited to journal submission workflows and scholarly publishing pipelines. Every file is processed locally — nothing leaves your Mac.
Drag one .djot file or an entire folder onto Convertessa. Batch mode processes any number of documents in a single pass.
Pick JATS XML from the output list. Convertessa targets the JATS publishing tag set recognised by scholarly journals and submission portals.
Click Convert. Convertessa writes one .xml file per source document, preserving your document structure with no server round-trip.
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 embedded metadata from the source file during conversion so the output contains only document content, not authoring-tool artefacts.
Yes. Pass a folder path — convertessa ./docs/ --to jats — and Convertessa converts every .djot file it finds, writing a matching .xml file alongside each source.
No. Convertessa runs entirely offline. Your Djot files never leave your Mac; conversion happens on-device with no upload required.