Your files stay on your Mac.
Convertessa reads each MP4 clip frame-by-frame and writes a looping GIF alongside the original. The source video is never modified. Everything runs locally — no file leaves your Mac.
Drag one clip or an entire folder of MP4 files onto Convertessa. Batch mode processes every file in one pass.
Pick GIF from the output format list. Convertessa will write one animated GIF for each MP4 it finds.
Click Convert. Your GIFs land next to the originals — your MP4 files are never uploaded or modified.
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 runs entirely on your Mac. MP4 files are read and written locally — nothing is sent to a server or third party.
Yes. Drop a folder onto Convertessa or run convertessa ./folder/ --to gif to convert every MP4 inside in a single pass.
No. Convertessa strips metadata during conversion, so the output GIF contains only image frames — no embedded video tags or EXIF data.