Your files stay on your Mac.
Converting an Emacs Muse file to plain text removes all Muse markup directives and outputs the raw prose content as a .txt file. Convertessa runs entirely on your Mac — files are never uploaded. Convert a single file or drop a whole folder for batch output.
Drag one .muse file or an entire folder into Convertessa. Batch mode processes every Muse file in the folder in a single pass.
Pick Plain Text from the output format list. Convertessa will strip all Muse markup and write clean .txt files.
Click Convert. Your .txt files appear alongside the originals — no internet connection needed, nothing leaves your machine.
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. All Muse markup directives are stripped during conversion. The output .txt file contains only the prose content.
Yes. Drop the folder onto Convertessa and every .muse file inside is converted to .txt in one batch — no repeated clicks needed.
No. Convertessa strips embedded metadata from the file during conversion, leaving a clean plain text document.