If you plan to use Heiders Sans R Bold on a website, you need to embed it properly. Avoid simply using it as a desktop font. Instead, convert your .ttf file to .woff and .woff2 formats using a free online converter. Then upload the files to your server and use the CSS @font-face rule:
Contrary to "free download" queries, Heiders Sans R Bold is a commercial typeface Heiders Sans R Bold Font Free Download