Your files stay on your Mac.
Convertessa reads your .ipynb file and writes a JATS XML document structured for journal submission and archiving. Code cells, markdown narrative, and outputs are mapped to the appropriate JATS elements. Everything runs locally — your notebooks never leave your Mac.
Drag one .ipynb file or an entire folder of notebooks onto Convertessa. The app reads each file directly from disk — nothing is uploaded.
Choose JATS XML from the output list. Convertessa writes one .xml file per notebook, structured to the JATS article schema.
Click Convert. Your JATS XML files appear in the destination folder, ready for submission or archiving.
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 notebook sections to standard JATS article elements: markdown cells become <sec> and <p> blocks, code cells are wrapped in <code> elements, and top-level metadata is placed in the <article-meta> section.
Yes. Point Convertessa at a folder and it converts every .ipynb file inside, producing one JATS XML file per notebook. From the CLI: convertessa ./notebooks/ --to jats.
Yes. Convertessa strips embedded notebook metadata and kernel information from the output file, keeping only document content in the JATS structure.