Your files stay on your Mac.
GIF caps animation at 256 colors and grows large fast for anything longer than a few seconds. Converting to MP4 encodes your animation as H.264 video — full color depth, a fraction of the file size, and native playback in every modern browser, player, and platform. Convertessa runs the conversion locally on your Mac; your files never leave the device.
Drag one GIF or an entire folder into Convertessa. Batch mode processes every GIF in the folder in a single pass, with no file-count limit.
Choose MP4 from the output format list. Because MP4 uses lossy H.264 encoding, you can also set quality to balance visual fidelity against file size.
Click Convert. Convertessa encodes each GIF to MP4 offline, preserving the original resolution. No upload, no server round-trip — output lands in the same folder.
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.
GIF stores every frame as a separate indexed image, which adds up quickly. MP4 uses H.264 inter-frame compression — it encodes only what changes between frames — so the same animation is typically 5–20× smaller with no visible quality loss.
Convertessa preserves the animation timing from the source GIF. Whether the MP4 loops depends on the player: browsers loop a video element with the loop attribute, and most desktop players have a repeat option. The file itself contains the full animation sequence.
Yes. Any EXIF or embedded metadata present in the source GIF is stripped during conversion. The output MP4 contains only the encoded video stream.