Your files stay on your Mac.
DocBook stores technical documents as deeply nested XML, with hundreds of element types wrapping every heading, paragraph, and code block. Djot is a lightweight markup language that expresses the same structure in plain, human-readable text. Convertessa maps DocBook elements to their Djot equivalents and writes one .djot file per source document — no upload, no cloud service, no internet required.
Drag one or more .dbk files — or an entire documentation folder — into Convertessa. Every file stays on your Mac throughout the process.
Choose Djot from the output format list. Convertessa maps DocBook sections, lists, code blocks, admonitions, and inline markup to their Djot counterparts.
Click Convert. Convertessa writes one .djot file for each source document, preserving document structure and stripping XML metadata.
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. DocBook <section> and <chapter> nesting maps to Djot heading levels, so your document outline is intact in the output file.
Yes. Drop a folder onto Convertessa or run convertessa ./docs/ --to djot in the terminal. Every .dbk file in the folder is converted in one batch, and the output files are written alongside the originals.
Yes. DocBook document metadata embedded in XML attributes and processing instructions is removed during conversion. The resulting Djot files contain only the document content and structure.