Your files stay on your Mac.
Converting a .ipynb file to plain text pulls every cell — code, markdown, and captured output — into a single readable .txt file. The result is easy to diff, search, or share without a Jupyter environment. Files never leave your Mac.
Drag one .ipynb file or an entire folder of notebooks onto Convertessa. No upload, no account — everything stays on your Mac.
Choose Plain Text from the output list. Convertessa will extract all cell content, markdown, and outputs into a .txt file.
Click Convert. Each .ipynb becomes a .txt file in the same folder, ready to open in any text editor or pipe into other tools.
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.
Convertessa extracts all cell content — code cells, markdown cells, and their captured outputs such as print statements and text results. Notebook metadata, kernel info, and widget state are not carried over.
Yes. Drop a folder onto Convertessa or use the CLI: convertessa ./notebooks/ --to txt. Every .ipynb in the folder is converted in one pass.
Yes. The output is a standard UTF-8 .txt file with no Jupyter-specific structure, so it opens in any text editor, terminal pager, or code tool on any platform.