Your files stay on your Mac.
Convertessa reads your .muse source files and rewrites them as Textile markup. Headings, inline emphasis, hyperlinks, and list structure are translated into their Textile equivalents. Every file is processed locally — nothing is uploaded to any server.
Drag one .muse file or an entire folder into Convertessa. Batch mode processes every file in the folder in a single pass.
Pick Textile from the output format list. Convertessa targets the Textile spec and maps Muse markup constructs to their closest Textile equivalents.
Click Convert. Convertessa writes the .textile files alongside your originals. No upload, no round-trip — conversion runs entirely on your Mac.
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 headings, bold and italic emphasis, hyperlinks, unordered and ordered lists, and block-level preformatted text. Muse directives that have no Textile equivalent are dropped and do not appear in the output.
Yes. Point Convertessa at the folder and it converts every .muse file it finds, writing a matching .textile file next to each one. Use the CLI for scripted pipelines: convertessa ./docs/ --to textile.
No. Conversion runs entirely offline on your Mac. Your .muse files never leave your machine.