Your files stay on your Mac.
Convertessa reads your PowerPoint presentations and writes them out as OpenDocument Slides (.odp) entirely on your Mac. No upload, no account — files never leave the machine. Drop a single deck or a whole folder and every .pptx is converted at once.
Drag one .pptx or an entire folder into Convertessa. The app reads every slide deck you drop, including files nested in subfolders.
Choose OpenDocument Slides from the output format list. Set quality to control how embedded images are encoded in the .odp output.
Click Convert. Convertessa writes .odp files alongside your originals — source files are never modified.
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. Convertessa runs entirely offline. Your .pptx files are read and written locally — nothing is uploaded to any server.
Yes. Drop a folder onto Convertessa and it converts every .pptx inside, including files in subfolders, producing a matching .odp for each one.
Yes. Convertessa removes embedded metadata from the .odp output, so author names, revision history, and other document properties from the original .pptx are not carried over.