Your files stay on your Mac.
JPEG XL compresses beautifully, but support across browsers, apps, and devices is still limited. Convertessa reads your .jxl files locally and writes standard JPG that opens everywhere. Drag in a single file or an entire folder — nothing is uploaded.
Drag one .jxl file or a whole folder of them onto Convertessa. Every file is processed on your Mac; nothing leaves your machine.
Pick JPG from the output format list. Set quality to balance file size against image detail — higher keeps more; lower shrinks the file.
Click Convert. Convertessa writes your JPG files at full original resolution and strips EXIF metadata, leaving clean, portable images ready to share or upload.
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 every encode discards some data. Set quality to 90–95 and the difference is rarely visible; lower values shrink file size further at the cost of fine detail.
Yes. Drag the folder onto Convertessa, choose JPG, and every .jxl file inside is converted in one pass. The CLI also handles folders: convertessa ./photos/ --to jpg.
Yes — GPS coordinates, camera model, timestamps, and other embedded metadata are stripped during conversion, so the resulting JPG files contain no EXIF.