How to edit .woff font files offered by Google Webfonts?

Question

Is there any free or cheap editor for Windows, that would allow to edit files with .woff extension (I checked in css that the font file has woff extension). These are fonts offered by Google Webfonts and they are free to embed, modify etc. I'd like to only add diacritic accents to some letters for specific language and embed the font on a website.

Bareback

Answer 1

Convert the 'woff' webfont to a regular font (e.g. TTF) using a service such as Online Font Converter. Then edit the converted file with your favorite font editing software.

Specific 'woff' Editor:

http://www.high-logic.com/font-editor/fontcreator.html

Programming Tools:

http://www.freetype.org/

Alack

Google brought me here I suppose – Ornithopod

Google brought me here, (goes uses Google again, ends up here again). -_-" – Gustie

Answer 2

There's a free, cross-platform tool called FontForge, which can be used to create, edit, and view a wide array of font types.

Homepage: http://fontforge.org/
Github: https://github.com/fontforge/fontforge/

Here are some screenshots of it in action:

WOFF

WOFF2 ^{(added in 2018)}

Editing Characters

Penitential

Fontforge can't handle woff2 fonts. – Graniela

@Graniela this is no longer true. It seems to handle woff2 files just fine now – Aldridge

@Aldridge I am not sure what specific formats it can handle, but anything I throw at it in woff format won't even open, let alone be edited. – Galatia

@astralmaster, the latest version should handle .woff and .woff2 just fine. If you're having a specific issue, I'd open an issue on the github repo, but every file I've tested has worked so far. – Penitential

Can confirm, this software does not open my *.woff2, while a web tool like eg this one does so without complaining. – Jahdiel