Your files stay on your Mac.
JATS XML encodes scientific articles as structured elements — authors, abstracts, sections, references, and figures. Convertessa reads those elements and writes a Typst source file with headings, author blocks, body text, and bibliography entries mapped to Typst markup. The output is ready to open, edit, or compile in any Typst environment.
Drag one file or an entire folder of .jats documents onto Convertessa. Files never leave your Mac — no account, no upload, no size limit imposed by a server.
Choose Typst from the output format list. Convertessa maps each JATS element — article metadata, section hierarchy, inline markup, and reference lists — to its Typst equivalent.
Click Convert. Convertessa writes a .typ file alongside each source. Open it in Typst directly or drop it into your existing document project.
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 the most common article-level fields — title, authors, affiliations, abstract, and publication date — to Typst's document metadata block. Body sections, figures, tables, and <ref-list> entries are also converted; any element Convertessa cannot map is preserved as a comment in the output so nothing is silently dropped.
Yes. Run convertessa ./articles/ --to typ and Convertessa processes every .jats file in the folder, writing a matching .typ file next to each one. No file ever leaves your Mac during batch conversion.
For document formats Convertessa can remove embedded metadata on request, but for JATS-to-Typst the article metadata (authors, DOI, journal info) is intentionally written into the Typst output rather than stripped, because it is part of the document content rather than hidden file properties.