Your files stay on your Mac.
Convertessa reads each .gif frame by frame and encodes the sequence as an M4V video file that iTunes and Apple TV can play natively. Set quality to balance visual fidelity against file size. Processing runs entirely on your Mac — no upload, no internet required.
Drag one .gif or an entire folder onto Convertessa. Batch mode converts every GIF in the folder in a single pass.
Pick iTunes M4V from the output format list. Adjust the quality slider to control how tightly each frame is encoded before you convert.
Convertessa encodes each file locally and saves the M4V alongside the original. No internet connection needed.
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 reads every frame in the GIF and encodes them in sequence, so the resulting M4V plays the complete animation at the original frame timing.
Quality controls how tightly each video frame is compressed during encoding. Higher quality produces a larger file with more detail; lower quality shrinks the file at the cost of some sharpness.
Yes. Drop a folder onto Convertessa or run convertessa /path/to/folder --to m4v and every .gif inside is converted in one pass.