Your files stay on your Mac.
Portable Pixmap stores every pixel uncompressed, so PPM files are faithful but large and awkward to share. Converting to JPG applies lossy compression at a quality level you control, producing a compact image that opens in every browser, app, and device. Convertessa runs entirely on your Mac — files never leave your machine.
Drag one PPM file or an entire folder into Convertessa. Batch mode processes every .ppm file in the folder in a single pass.
Choose JPG from the output format list, then set quality to dial in the balance between file size and image fidelity.
Hit Convert. Convertessa writes the JPG files alongside the originals, preserves resolution, and strips embedded metadata from the output.
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.
JPG is a lossy format, so some data is discarded to achieve a smaller file. Convertessa lets you set quality before converting, so you control exactly how much fidelity is traded for file size.
Yes. Drop a folder onto Convertessa and it converts every .ppm file inside to JPG in one pass. From the command line, run convertessa ./folder --to jpg.
Yes. Convertessa strips EXIF and other embedded metadata from every JPG it writes, so no hidden location, camera, or author data travels with the shared file.