Your files stay on your Mac.
Man pages are written in roff, a formatting language understood by terminal pagers but not by browsers or documentation sites. Converting to HTML turns each .man file into a self-contained webpage with headings, code blocks, and cross-reference links intact. Convertessa processes the roff source directly on your Mac — no upload, no server, no internet required.
Drag one or more .man, .1–.8, or other roff-formatted files onto Convertessa, or select a whole folder of man pages to process in one pass.
Pick HTML from the output format list. Convertessa reads the roff source and maps macros to semantic HTML elements — headings, paragraphs, code spans, and definition lists.
Click Convert. Each man page becomes a standalone .html file with the same base name, written next to the original. No network connection needed at any step.
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 handles the most common man page macro sets — man (AT&T) and mdoc (BSD). Directives like .TH, .SH, .B, and .I are all mapped to their HTML equivalents.
Yes. Drag a folder onto Convertessa or run convertessa ./man/ --to html in the terminal. Every roff file in the folder is converted in one pass and output files are written alongside the originals.
The generated HTML uses semantic elements — <h1>, <pre>, <code>, <dl> — so it picks up styling from any standard stylesheet. Convertessa does not embed inline styles, giving you full control over presentation.