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🚨 FontPrep is no longer maintained and has been superceded by fontplop 🚨


The missing font generator for Mac OSX. Download here.


FontPrep takes your TTF and OTF font files and generates all of the respective font-formats for the web: WOFF, EOT, and SVG.

How it works

FontPrep uses a slightly modified version of cocoa-rack ( In essence, when you start FontPrep, you're starting a little Sinatra app on port 7500 then instantiating a webview pointing at that server.

Commands are sent from the webview back down to the Sinatra server as you interact with FontPrep, and commands are piped to stdout (be it FontForge, ttf2eot, etc.) to complete the given task. We use a little Applescript magic when necessary.

The main Sinatra logic lives inside of fontprep/server. The sinatra server is daemonized, meanings its process will persist across closing/opening of FontPrep. To kill FontPrep's server outright, visit in your browser.

Building FontPrep

Simply open up FontPrep.xcodeproj with the latest version of XCode, go to Product -> Clean then Product -> Run or Product -> Archive to create a binary.

Updating FontPrep

Be sure to increment the Version and Bundle inside XCode to update FontPrep correctly. Incrementing these values is what tells FontPrep to kill old daemonized server processes.

A word of caution

This code has not been incredibly well maintained over the years. Tread lightly and have fun breaking FontPrep.


Watch a demo here.


Brian Gonzalez
Matthew Gonzalez