Your files stay on your Mac.
Convertessa reads your ODT file and maps its heading structure — Heading 1, Heading 2, Heading 3, and deeper — into nested OPML
Drag a single ODT file or an entire folder into Convertessa. Batch mode converts every ODT file in the folder in one pass, with no upload required.
Choose OPML from the output format list. Convertessa will map each heading level in the document to a corresponding nested
Click Convert. Your .opml files appear in the destination folder immediately, stripped of document metadata and ready to open in any OPML-compatible app.
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 extracts the document's heading hierarchy — Heading 1 through Heading 9 — and maps each level to a nested <outline> element. Body paragraphs, tables, and images are not included; the output is a pure structural outline.
Yes. Author name, creation date, revision history, and any embedded document properties are removed from the output. The .opml file contains only the outline structure derived from your headings.
Yes. Drag a folder onto Convertessa and every ODT file inside is converted to a separate .opml file in a single pass. From the command line: convertessa ./folder/ --to opml.