Your files stay on your Mac.
JATS XML encodes scientific articles as tagged markup — sections, figures, references, and metadata. Converting to Jupyter Notebook restructures that content into executable .ipynb cells, making the article navigable and runnable in any Jupyter environment. Convertessa does the conversion locally; your files never leave your Mac.
Drag a single .jats file or an entire folder of articles onto Convertessa. Batch conversion processes every file in one pass.
Select Jupyter Notebook (.ipynb) from the output list. Set quality for any embedded media before converting.
Click Convert. Convertessa writes the .ipynb files alongside your originals — no upload, 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.
Yes. Convertessa maps JATS sections, figures, tables, and references into corresponding notebook cells, preserving the document hierarchy present in the original XML.
Yes. Drop a folder onto Convertessa or pass the directory via the CLI (convertessa ./articles/ --to ipynb), and every .jats file inside is converted in one batch.
Yes. Convertessa strips JATS metadata embedded in the source file. The resulting .ipynb contains the article body content without embedded author or publisher metadata.