Your files stay on your Mac.
Convertessa reads each Jupyter Notebook file and writes it out as a roff-formatted Man Page document. Notebook cells, markdown, and code blocks are mapped to roff macros so the result renders cleanly in any man viewer. Everything runs locally — your .ipynb files never touch a server.
Drag one .ipynb file or an entire folder of notebooks onto Convertessa. The CLI accepts a directory too, converting every notebook in one pass.
Choose Man Page (roff) from the output format list. Convertessa will apply the roff macros required for standard man page rendering.
Click Convert. Each .man file is written alongside the original, folder structure intact. No upload, no cloud dependency, 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.
No. Convertessa runs entirely on your Mac. Your .ipynb files are read and written locally — nothing is sent to a server or cloud service.
Yes. Drop a folder onto Convertessa or run convertessa ./folder --to man. Every .ipynb file in the folder is converted in one pass, with the original structure preserved.
No. Convertessa strips embedded metadata from the output. The resulting .man file contains only the document content mapped to roff macros — kernel info, execution counts, and notebook-level metadata are not carried over.