Your files stay on your Mac.
Portable Pixmap (.ppm) is a minimal, uncompressed bitmap format used for tool interop — but it is large on disk and rarely accepted by publishing or archiving software. TIFF delivers the same lossless pixel fidelity with far wider application support, making it the standard for print workflows, professional imaging, and long-term archiving. Convertessa converts your .ppm files to .tiff entirely on your Mac; nothing is uploaded.
Drag one or more .ppm files — or an entire folder — onto Convertessa. All files are processed locally.
Pick TIFF from the output format list. Because TIFF is lossless, no quality setting is required.
Click Convert. Your .tiff files are written alongside the originals with resolution preserved and no data sent off your machine.
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. TIFF is a lossless format, so every pixel from your source .ppm is reproduced exactly. No image data is discarded during the conversion.
Yes. Drop a folder onto Convertessa or run convertessa ./photos/ --to tiff to batch-convert every .ppm inside it in a single pass.
Yes. Convertessa carries the resolution recorded in each source .ppm through to the output TIFF unchanged — nothing is resampled.