Your files stay on your Mac.
A .cur file stores one or more cursor bitmaps at fixed sizes. Convertessa reads each embedded bitmap and writes it out as a WebP image—entirely on your Mac, nothing uploaded. Because WebP is lossy, you can set quality before exporting to balance sharpness against file size.
Drag a single .cur file or an entire folder onto Convertessa. The app reads every cursor bitmap inside each file and queues them for conversion.
Choose WebP from the output list. Because WebP is a lossy format, a quality slider appears—raise it to preserve fine cursor detail, lower it to reduce file size.
Click Convert. Every file is processed locally on your Mac—originals are untouched and nothing leaves your machine.
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. WebP supports an alpha channel, so transparent regions in your .cur bitmap are carried over to the output file.
WebP encodes lossy data, so a higher quality value retains more detail at a larger file size while a lower value shrinks the file at the cost of some sharpness. The default strikes a good balance for most cursor images.
Yes. Drop a folder onto Convertessa and it processes every .cur file inside in one pass. From the terminal: convertessa ./cursors/ --to webp.