Your files stay on your Mac.
HTML is the markup language of the web — every page, exported report, or email template you view in a browser is an .html document. Convertessa reads your HTML files locally and converts them into 23 formats: Markdown, DOCX, EPUB, PDF, RST, ODT, LaTeX, plain text, and more. Nothing is uploaded; all processing happens on your Mac.
Drop a .html file into Convertessa or pass it on the command line. You can also point at a whole folder to convert every file inside in one go.
Pick the output you need — Markdown, DOCX, EPUB, PDF, RST, ODT, LaTeX, plain text, or any of the 23 supported formats.
Convertessa processes the file locally and writes the converted output alongside the original. No upload, no internet connection required.
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.
No. Convertessa runs entirely on your Mac. Your .html files are read and converted locally — nothing is sent over the network.
Convertessa converts HTML to AsciiDoc, DocBook, Djot, DOCX, EPUB, ICML, Jupyter Notebook (.ipynb), JATS, man page, Markdown, Muse, ODT, OPML, Org-mode, PDF, reStructuredText, RTF, LaTeX, Texinfo, Textile, plain text, Typst, and MediaWiki — 23 targets in total.
Yes. Pass a folder path on the command line and Convertessa will process every .html file inside it, writing each result to your chosen target format.