Your files stay on your Mac.
TTC files bundle several font faces into a single collection; WOFF holds one face at a time, compressed for the web. Converting unpacks each face in your TTC into its own WOFF file, with the glyph outlines, hinting and kerning left exactly as they were. Nothing is redrawn — it's a lossless container change that runs entirely offline on your Mac.
Add a single TTC collection or point Convertessa at a whole folder of them — batch conversion works the same way, all processed locally on your Mac.
Choose WOFF from the output list once your TTC files are loaded, and Convertessa converts every face in the collection, keeping outlines, hinting and kerning intact.
Run the conversion from the app or the command line — Convertessa processes everything offline, so your font files never leave your Mac.
Images, audio, video, documents, archives, eBooks and fonts — 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.
A TTC collection can contain several distinct font faces in one file. Converting to WOFF unpacks each face into its own separate WOFF file, with the original glyph outlines, hinting and kerning left untouched.
No. This is a lossless container change — nothing about the glyph outlines is redrawn. Converting the format doesn't grant new redistribution or embedding rights; the original font's license or EULA still applies to the WOFF files you get.