Your files stay on your Mac.
TIFF files are lossless and large; JPG applies lossy compression that shrinks file size dramatically while keeping the image visually sharp. Convertessa decodes each TIFF locally, writes a JPG at the quality level you set, and strips EXIF metadata—all without uploading anything. Every conversion runs entirely on your Mac.
Drag one TIFF or an entire folder of TIFFs onto Convertessa. You can also use File → Open to pick individual files or a whole folder at once.
Choose JPG from the output format list. Set quality to control the trade-off between file size and visual fidelity before you convert.
Click Convert. Convertessa processes every file locally—nothing is uploaded—and saves the JPGs alongside your originals or to a destination folder you choose.
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 image data is discarded during compression. Convertessa lets you set the quality level before converting, giving you direct control over the size-versus-fidelity trade-off. Higher quality means larger files; lower quality means smaller files.
No. Convertessa strips EXIF and other embedded metadata from every output JPG. This removes location data, camera settings, and other personal information from the file automatically.
Yes. Drop a folder onto Convertessa or pass a folder path to the CLI: convertessa ./photos/ --to jpg. Every TIFF in the folder is converted in a single pass.