Which bold to use
- Bold sans matches the system fonts on most apps, so it looks the most natural in posts and comments.
- Bold serif has a bookish, formal feel. It's good for a quote or a title.
- Bold italic adds urgency: deadlines, sales, warnings.
- Bold cursive and bold Old English are decorative. Keep them for names and short headers.
Bold text on LinkedIn, X and YouTube
LinkedIn posts, X posts and YouTube comments have no bold button, so styled Unicode is the usual workaround. Use it for a hook or a heading inside a longer post. On LinkedIn especially, a fully bold post is harder to read and can look like a gimmick.
AccessibilityUnicode bold letters are not real formatting. Screen readers may announce them oddly, and they won't match searches for the plain word. Bold a few words, never your whole message.
Questions
How do I make text bold on Instagram or Facebook?
Neither app has a bold button. Type your text above, copy the Bold sans line and paste it into your post, bio or comment.
Do bold numbers work?
Yes. Bold sans, bold serif and bold cursive styles include bold digits 0โ9.
Will bold text show on every phone?
Bold sans and bold serif are supported on nearly all modern phones and computers. Filled squares and bubbles are the least supported.