Your files stay on your Mac.
Convertessa reads your HTML file and maps its structure into JATS XML — the Journal Article Tag Suite format used by scientific publishers, institutional repositories, and PubMed Central. Headings, paragraphs, lists, and links are translated into the corresponding JATS elements. The conversion runs entirely on your Mac; files never leave your machine.
Drag one HTML file or an entire folder into Convertessa. Batch mode processes every file in a single pass.
Choose JATS XML from the output list. Convertessa maps the HTML structure to the corresponding JATS elements automatically.
Click Convert. Your JATS XML files are saved alongside the originals — no upload, no account, no internet connection required.
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.
Convertessa maps standard HTML structural elements — headings, paragraphs, lists, links, tables, and inline emphasis — to their JATS XML equivalents. The output follows the Journal Article Tag Suite schema accepted by most publishers and submission systems.
Yes. Drop a folder onto Convertessa or run convertessa ./folder/ --to jats in the terminal. Every HTML file in the folder is converted in a single pass.
Yes. Convertessa removes embedded metadata from HTML documents during conversion, so the resulting JATS XML contains only the structured content of the article itself.