Your files stay on your Mac.
Convertessa reads each GIF and writes a HEIC file at the quality level you choose. HEIC — Apple's High Efficiency Image Container — stores full-colour image data far beyond GIF's 256-colour palette. Every file is processed locally; nothing is uploaded to a server.
Drag one GIF or an entire folder into Convertessa. Static and animated GIFs are both accepted.
Choose HEIC from the output format list, then set quality to balance visual fidelity against file size.
Click Convert. Convertessa writes a HEIC file for each input GIF, preserving resolution and stripping embedded metadata.
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. Convertessa strips embedded metadata from every output HEIC file, so no hidden image data from the original GIF carries over.
Yes. Drop a folder into Convertessa or run convertessa *.gif --to heic in the terminal to batch-convert every GIF in a directory in one pass.
HEIC is lossy, so a higher quality setting preserves more detail at the cost of a larger file. For most GIF-sourced images, a quality of 80–90 is a good starting point.