Your files stay on your Mac.
Flat ODF Text (.fodt) is LibreOffice's uncompressed, human-readable XML document format. Converting to DOCX rewrites it in Office Open XML so it opens natively in Microsoft Word, Google Docs, and any Office-compatible editor. Document metadata is stripped in the process.
Drag one .fodt file or an entire folder into Convertessa. Batch mode processes every Flat ODF Text document in the folder in a single pass.
Choose Word from the output format list. Convertessa targets the .docx spec and leaves your source files untouched.
Click Convert. Convertessa rewrites each file locally — nothing is uploaded, and the results land alongside the originals.
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. Conversion runs entirely on your Mac. Files never leave your machine — there is no upload step and no internet connection required.
Yes. Convertessa targets the standard .docx (Office Open XML) format, which Word, Google Docs, LibreOffice, and other Office-compatible editors open natively.
Yes. Drag the folder into Convertessa and every Flat ODF Text file inside is converted in one batch. From the terminal, run convertessa *.fodt --to docx to convert all files in the current directory.