Your files stay on your Mac.
Convertessa reads each .ipynb file—code cells, markdown, and embedded outputs—and writes a .docx you can open in Microsoft Word or any compatible editor. The conversion runs entirely on your Mac; no file ever leaves your machine. Drop a single notebook or a whole folder of them.
Drag one or more .ipynb files into Convertessa, or point it at a folder to convert an entire project in one pass.
Choose Word from the output format list to set .docx as the target.
Convertessa processes each notebook locally and writes a .docx alongside the original. No upload, no account, no internet 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 each code cell and its rendered output into the Word document. Markdown headings, paragraphs, and inline formatting are preserved as styled Word content.
Yes. Point Convertessa at a directory and it converts every .ipynb file it finds, writing one .docx per notebook alongside the originals.
No. Convertessa runs entirely on your Mac. Your .ipynb files never leave your machine and no internet connection is required.