Your files stay on your Mac.
Converting an OpenDocument Sheet to Excel Workbook produces a .xlsx file that opens natively in Microsoft Excel, Google Sheets, and any OOXML-compatible application. Cell formulas, named ranges, and multi-sheet structure transfer intact. Conversion runs entirely on your Mac — nothing is uploaded.
Drag one .ods file or an entire folder into Convertessa. Every ODS file in the folder is queued automatically — no manual selection required.
Choose Excel Workbook (.xlsx) from the output format list. Convertessa maps each sheet, formula, and named range to its XLSX equivalent before writing the file.
Click Convert. Your .xlsx files appear alongside the originals — or in a destination folder you specify — ready to open in Excel or any OOXML-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.
Yes. Convertessa maps ODS cell formulas and named ranges to their XLSX equivalents. Standard spreadsheet functions are preserved; any ODS-specific extensions that have no direct XLSX counterpart are noted in the output log.
No. Conversion runs entirely on your Mac using local libraries. Your files never leave your machine, making it safe to convert confidential or sensitive spreadsheets.
Yes. Drag a folder onto Convertessa and every ODS file inside is converted in one pass. From the command line, run convertessa *.ods --to xlsx or point it at a directory to process all ODS files within it.