Your files stay on your Mac.
Convertessa reads your .djot files and writes them out as .ipynb notebooks, mapping your structured Djot markup to notebook cells ready to open in JupyterLab or VS Code. Conversion runs entirely on your Mac — nothing is uploaded and no internet connection is required. Drop a single file or point Convertessa at a folder to process the whole batch at once.
Drag one or more .djot files into Convertessa, or select a whole folder to queue everything for batch conversion.
Pick Jupyter Notebook (.ipynb) from the output format list. Convertessa maps your Djot markup structure to notebook cells.
Click Convert. Convertessa writes each .ipynb file to your chosen destination — no upload, no account, no waiting.
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 runs entirely offline. Your .djot files are read and written locally — nothing is sent to a server or any third-party service.
Yes. Drag a folder into Convertessa or run convertessa ./folder/ --to ipynb to convert every .djot file in one pass.
Yes. Convertessa strips embedded metadata from your Djot source during conversion, so the resulting .ipynb contains only your document content.