Your files stay on your Mac.
HTML is the markup language of the browser; AsciiDoc is the plain-text format built for technical documentation, books, and man pages. Converting HTML to AsciiDoc produces a version-control-friendly source file you can edit in any text editor, render with Asciidoctor, and publish to PDF, HTML, or DocBook. Convertessa maps headings, lists, links, and code blocks to their AsciiDoc equivalents, entirely on your Mac.
Drag one file or an entire folder of HTML pages into Convertessa. Batch mode processes every .html file in the folder in one pass.
Pick AsciiDoc from the output format list. Convertessa maps your HTML structure — headings, paragraphs, links, lists, and code blocks — to the equivalent AsciiDoc syntax.
Click Convert. Your .adoc files appear alongside the originals. No upload, no account, no internet connection needed.
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 maps the structural elements that matter for documentation: headings (h1–h6), paragraphs, ordered and unordered lists, hyperlinks, inline code, fenced code blocks, bold, italic, and blockquotes. Decorative or layout-only HTML is dropped cleanly.
Yes. Pass the folder to the CLI with convertessa ./folder --to adoc and Convertessa processes every .html file it finds, writing a matching .adoc file next to each source.
No. Convertessa runs entirely offline. Your HTML files are never uploaded to any server — the conversion happens locally in the app.