How Can I Convert Web Fonts to Base64 Without Affecting Their Appearance?

Convert and Render Web Fonts to Base64 Without Compromising Authenticity

With deferred font loading techniques gaining popularity, converting web fonts to base64 has become essential. However, direct conversion often results in noticeable differences in font appearance. This issue stems from the alteration of TrueType instructions (hints) during the conversion process.

To preserve the original font fidelity, ensure the 'TrueType Hinting' option in Font Squirrel Expert is set to 'Keep Existing'. This option maintains the existing hints, preventing font modifications that could affect its rendering.

Alternatively, if the font rendering directly from Google Web Fonts is acceptable, you can extract the font file and perform the base64 encoding yourself. In OS X or Linux, use the base64 command:

$ base64 -i myfont.ttf -o fontbase64.txt

For Windows, download a base64 encoding tool. Convert the raw font file to base64 and apply it in your CSS using a slightly different syntax:

@font-face {
    font-family: 'myfont';
    src: url(data:font/truetype;charset=utf-8;base64,<<copied base64 string>>) format('truetype');
    font-weight: normal;
    font-style: normal;
}

Remember to modify the @font-face parameters to match your specific font data. By following these methods, you can successfully convert web fonts to base64 while ensuring their appearance remains identical to the original files.

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