Your files stay on your Mac.
Convertessa reads each Markdown file and rewrites it as AsciiDoc syntax — headings, ordered and unordered lists, fenced code blocks, inline formatting, and links all map to their AsciiDoc equivalents. The result works directly with Asciidoctor and DocBook toolchains. Conversion runs entirely on your Mac; nothing is uploaded.
Drag one .md file or an entire folder of Markdown documents onto Convertessa. Batch mode processes every file in the folder in one pass.
Pick AsciiDoc from the output list. Convertessa maps Markdown headings, lists, code fences, links, bold, and italic to their AsciiDoc equivalents.
Click Convert. Each .md file becomes a .adoc file beside the original — ready for Asciidoctor, Antora, or any DocBook pipeline.
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. Pass a folder path to Convertessa and it converts every .md file inside. Output .adoc files land beside their originals, preserving the directory layout.
YAML or TOML front matter blocks are passed through as-is so downstream tooling can handle them. No content is silently dropped.
The output follows standard AsciiDoc syntax and works with Asciidoctor, Antora, and any processor that targets DocBook or HTML via AsciiDoc.