Your files stay on your Mac.
Converting an Excel 97–2003 workbook to PDF locks every cell, formula result, and grid line into a document anyone can open — no Excel required. The conversion runs entirely on your Mac; files never leave your machine. Metadata is stripped from the output by default.
Drag a single .xls file or an entire folder of workbooks onto Convertessa. The app reads each sheet and prepares it for PDF output.
Pick PDF from the output format list. Use the quality slider to control how embedded images are rendered — higher quality means larger output files.
Click Convert. Convertessa processes every workbook locally — no internet connection needed — and saves the PDFs 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.
Yes. Convertessa calculates each cell before export, so totals, lookups, and conditional values appear exactly as they would on screen in the finished PDF.
Yes. Drop a folder onto Convertessa and every .xls file inside is converted to PDF in one pass — no need to open files one by one.
No. Convertessa runs entirely on your Mac. Your files never leave the machine, so sensitive spreadsheet data stays private.