Your files stay on your Mac.
Convertessa reads each .ipynb file — code cells, markdown narrative, and captured outputs — and writes an ODT document you can open in LibreOffice Writer or any OpenDocument-compatible word processor. Quality is adjustable before conversion. Everything runs locally on your Mac; no file leaves the machine.
Drag one .ipynb file or an entire folder of notebooks onto Convertessa. Batch mode processes every notebook in the folder in a single pass.
Choose OpenDocument Text from the output list. Adjust quality to taste, then confirm.
Convertessa writes each .odt file alongside the source notebook. Code cells, markdown, and outputs are carried over into the document structure.
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. Captured outputs — text results, displayed values, and tables — are written into the ODT document alongside the corresponding code and markdown cells.
No. Convertessa runs fully offline. Your notebooks are read and written locally; nothing is sent to a server or cloud service.
Yes. Drop a folder onto Convertessa, or run convertessa *.ipynb --to odt in the terminal to batch-convert every notebook in the current directory.