Your files stay on your Mac.
Convertessa reads your .adoc file, maps its headings, sections, and inline markup to EPUB 3 structure, and writes a valid .epub archive. The result opens in Apple Books, Calibre, or any e-reader app. Everything runs on your Mac — no file ever leaves the machine.
Drag one .adoc file or an entire folder into Convertessa. The app reads your document structure — headings, paragraphs, tables, and inline markup — without uploading anything.
Choose EPUB from the output format list. Set quality for any images embedded in your document if you want to tune file size.
Click Convert. Convertessa writes a valid EPUB 3 file alongside your original. Open it in any e-reader app or upload it directly to a publishing platform.
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 writes EPUB 3, the current standard supported by Apple Books, Kobo, Calibre, and all major publishing platforms.
Yes. Convertessa strips metadata from any images embedded in the EPUB, so no camera data, GPS coordinates, or authoring software tags travel with your ebook.
Yes — drop a folder into Convertessa or run convertessa ./docs/ --to epub from the command line. Each .adoc file is converted to its own .epub in one pass.