Like when comparing Arial to Helvetica, it’s not always easy to catch the subtle differences between two different typefaces. This is why Tiff has our attention: it’s a simple Web app that lets you visually compare and contrast any two fonts on your computer or in the Google Fonts library.

To the untrained eye, the differences between Helvetica and Arial are tough to catch:

Screen Shot 2013 07 14 at 11.45.28 AM 730x186 This design tool lets you compare the differences between two fonts

Comparing Helvetica to Futura, however, reveals significant differences:

Screen Shot 2013 07 14 at 11.45.14 AM 730x187 This design tool lets you compare the differences between two fonts

Don’t get me started on Comic Sans and Didot:

Screen Shot 2013 07 14 at 11.45.51 AM 730x184 This design tool lets you compare the differences between two fontsTiff is both a light-weight tool for understanding design differences in typefaces, and a utility for comparing typefaces on the Web. Check it out via the link below, and let us know what you think in the comments!

➤ Tiff (via Sidebar)

Pro tip: Click a letter on Tiff to zoom in on the designs)

Image credit: Thinkstock