Your files stay on your Mac.
Convertessa decodes each WebP image and re-encodes it as a standard JPEG. Set quality to control output fidelity, and EXIF metadata is stripped from every result. All processing happens locally — files never leave your Mac.
Drag one WebP image or an entire folder into Convertessa. The app reads each file locally — no upload, no internet connection needed.
Choose JPG from the output format list. Adjust quality to balance file size against image fidelity before converting.
Click Convert. Convertessa processes every file and saves the JPGs alongside the originals. EXIF metadata is stripped from each output image.
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. Convertessa preserves the original resolution. Each WebP file's full pixel count is carried through to the JPG output unchanged.
Yes. Drop a folder onto Convertessa or run convertessa ./folder/ --to jpg in the terminal. Every WebP file in the folder is converted in one pass.
No. Convertessa strips EXIF metadata from every output image, so location tags, camera model, and other embedded data are removed.