Your files stay on your Mac.
Convertessa reads your .textile source files and packages them as valid EPUB ebooks, preserving headings, inline formatting, lists, and links. The conversion runs entirely on your Mac — no file is uploaded and no account is required. Convert a single document or a whole folder of Textile files in one pass.
Drag one or more .textile files into Convertessa, or select a folder to queue every Textile document inside it at once.
Choose EPUB from the output format list. Because EPUB can embed images at varying fidelity, you can set quality for any images included in your content.
Click Convert. Convertessa writes each EPUB to your chosen output folder. Your files never leave your Mac — no server is involved at any point.
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. Convertessa maps Textile block and inline elements — headings, bold, italic, lists, blockquotes, and links — to their EPUB equivalents so the ebook renders as intended.
Yes. Point Convertessa at a folder and it queues every .textile file inside. Each document becomes its own EPUB, written to your output folder in a single pass.
No. Convertessa runs fully offline on your Mac. Neither the source .textile files nor the output EPUBs are sent to any server.