Your files stay on your Mac.
Convertessa reads every cell in your .ipynb file and writes it as reStructuredText markup: code cells become code-block directives, markdown cells become prose, and text outputs are included inline. The result is a self-contained .rst file ready for Sphinx, Read the Docs, or any RST toolchain. All processing happens on your Mac — your notebooks never leave your 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.
Pick reStructuredText from the output format list. Convertessa writes one .rst file per notebook, preserving cell order and code-block language tags.
Click Convert. Your .rst files appear alongside the originals — no upload, no account, and 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.
Each code cell is written as a .. code-block:: directive in the output .rst file, with the cell's language tag (e.g. python) preserved where available.
Text-based outputs — print statements, plain-text results, and tracebacks — are included inline in the converted .rst. Binary outputs such as embedded plots are omitted.
Yes. Drop a folder onto Convertessa or run convertessa ./notebooks/ --to rst to batch-convert every .ipynb file in one pass.