Your files stay on your Mac.
Convertessa reads each JPG and writes a TIFF with no additional compression pass. The pixel data is frozen at the quality captured in the source file. The entire conversion runs locally — no file is ever sent to a server.
Drag one file or an entire folder onto Convertessa. Batch mode processes every JPG in the folder in a single pass.
Choose TIFF from the output format list. Convertessa writes standard TIFF files compatible with Photoshop, Lightroom, and print workflows.
Click Convert. TIFF files appear alongside the originals. No upload, no account, no internet connection required.
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 lossless, so Convertessa writes the pixel data exactly as it exists in the JPG — no new compression is applied. If the source JPG has compression artifacts, they are preserved in the TIFF output.
Convertessa strips EXIF metadata from the output file. Pixel content is kept intact; only the embedded metadata is removed.
Yes. Drop a folder onto Convertessa or run convertessa /path/to/folder --to tiff in the terminal. Every JPG in the folder is converted in one pass.