Your files stay on your Mac.
PowerPoint 97–2003 (.ppt) is the legacy binary presentation format shipped with Microsoft Office up to 2003. Convertessa reads .ppt files entirely on your Mac and writes them to modern formats — no file ever leaves your machine. Batch-convert a whole folder of decks with a single command.
Drag a .ppt file onto Convertessa or pass it on the command line. The file is processed locally — nothing is uploaded.
Pick the target format from the output list. If your slides are image-heavy, set quality to tune the output size.
Convertessa writes the output file alongside the source. To convert a whole folder at once, use the batch command below.
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. Point Convertessa at a folder and every .ppt file inside is converted. Run convertessa ./decks/ --to pdf and all files are processed in one pass.
Never. Convertessa runs entirely offline — no upload, no cloud service, no internet connection required.
Convertessa converts .ppt to PDF, PPTX (modern PowerPoint), and ODP (OpenDocument Presentation). Choose the target from the output list before converting.