Recently I see someone asked about how to know if a font is webfont rip or original, I decided to write down what I know about this.
For definition of Webfont, Rip, see swit's post:
I rarely see people need the webfont (hereby denoted by WF) like eot and woff, so WF is not so popular here, but in most of font releases (even my posts), people use the keyword WF instead of Webfont Rip to indicate a ripped font, so please take note, and the reason is we posters want to save time.
Now here's the trick:
1. If you have a font and when you check its information from the foundry, they say there's no webfont version, your font is properly original.
2. For the case of font(s) from myfonts/youworkforthem:
On Myfonts you can check the file size and opentype features in the fontspec section by click on the font in the family, then navigate to Tech Spec tab, see image below:
If your font has exactly the same version + identical information in that tab, your font has high chance of being original.
On youworkforthem, if you can rip the webfont, when you open it in fontlab (for example), the copyright section is messed up with some strict conditions text etc. Some font rippers don't delete this line, so you can detect whether that font is original or not from that info.
For other foundry, you can check the total glyphs, because if a font is PDF ripped, normally there are some seldom-used glyphs will be missing.
3. Check the digital signature of the font (view 2nd reference link below). Normally in the fontviewer window, if there is Digitally Signed tag, the font has high chance of Original. See image below:
more info by samiartur on Digital Signature:
4. This reason might be ridiculous but if the font family is very well renamed, especially in font style, there's chance that they are webfont rip. I saw a lot of original fonts are badly named, while the webfont rip I get at printroot is perfectly renamed.The Digital signature table (DSIG).
An original good font has a valid DSIG.
You can check this with microsoft font validator (free)
To make a valid DSIG you need to pay.
take a look:
Personally I'm super fine with WF, since I can't see the difference and they just work perfectly, just some people die for the original though. (if they want that bad, just go buy them then), and as a poster, just give the correct info: WF or Original, I think other users will appreciate it.
If you want to read more please check Dj.Dance post:
And the question/answer thread:
If you're more professional + you know more than me + you see some mistakes, feel free to add more info, thank you very much!
And my English is not so good, apologize.