Your files stay on your Mac.
Convertessa reads each .odt file and writes a plain .md file, mapping headings, lists, bold, and italic to their Markdown equivalents. Formatting that has no Markdown counterpart is dropped cleanly. Every file is processed locally — nothing is uploaded to any server.
Drag one .odt file or an entire folder of them onto Convertessa. Batch mode processes every file in one pass.
Choose Markdown from the output format list. Convertessa targets the .md extension and maps ODT structure accordingly.
Click Convert. Each .odt file is written out as a .md file beside the original. No upload, no round-trip — done 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.
Headings (H1–H6), paragraphs, bold, italic, and ordered and unordered lists are mapped to their Markdown equivalents. Formatting that has no standard Markdown representation — such as page styles or complex tables — is omitted from the output.
Yes. Drop a folder onto Convertessa or pass a directory path in the CLI (convertessa ./folder/ --to md) and every .odt file inside is converted in a single batch. Output .md files are written alongside the originals.
No. Convertessa runs entirely offline. Your files are read and written locally; nothing is sent to a server or cloud service.