Your files stay on your Mac.
Convertessa reads each GIF — including animated ones — and re-encodes it as a WebP file using the lossy WebP codec. The output retains animation frames and transparency while letting you dial in the quality level you need. All processing runs on your Mac; no file is uploaded anywhere.
Drag one GIF or an entire folder into Convertessa. Static and animated GIFs are both supported.
Choose WebP from the output format list and set quality to balance file size against visual fidelity.
Click Convert. Convertessa processes every file locally, strips metadata, and saves the WebP output alongside the originals.
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.
Yes. Each frame from the source GIF is re-encoded into an animated WebP file. Frame count and timing are preserved.
Yes. Drag a folder into Convertessa or run convertessa /path/to/folder --to webp in the terminal. Every GIF in the folder is converted in one pass.
Yes. EXIF and other embedded metadata are stripped from the output WebP files by default.