Your files stay on your Mac.
Convertessa unpacks each WOFF font and writes its tables out as an XML TTX file — the format the fonttools toolchain reads and edits. Every glyph outline, hinting instruction and kerning pair carries over exactly as stored in the WOFF; nothing is redrawn or rasterized. The whole conversion runs offline, on your Mac, so the font file never leaves your machine.
Add a single WOFF file or a whole folder of them — Convertessa's batch mode queues every file for conversion at once.
Choose TTX from the output list. Convertessa never guesses the target format — you always pick it yourself.
Run the conversion from the CLI or the app. Each WOFF is unpacked locally and its tables written out as a TTX file, with outlines, hinting and kerning intact.
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.
No. TTX is a text/XML dump of the font's own tables, so glyph outlines stay as vector data — nothing is rendered to pixels.
Yes. TTX represents both glyf-flavored (TrueType) and CFF-flavored (PostScript) outline tables as XML, so either kind of WOFF converts cleanly.
No — converting the format doesn't change the license. Whatever redistribution or embedding rights came with the original WOFF file still apply to the TTX output.