Facebook is one of the most widely used social platforms, but when it comes to text formatting, it’s surprisingly limited.
Unlike bold or italic, Facebook has no native underline button for posts, comments, or bios.
The good news is that you can still underline text on Facebook using Unicode-based tricks.
This guide explains what’s possible today, how to generate underlined text step by step, and the best use cases for adding emphasis with this style.
🔍 Why Facebook Doesn’t Have an Underline Option
In most word processors, underlining is easy because it’s a styling command applied to text. But on Facebook, underline isn’t supported as a formatting feature.
- Bold and italic work via Unicode font substitutions.
- Underline, however, requires a combining character (a low line beneath each letter).
Since Facebook doesn’t offer native underline support, users rely on Unicode-based generators that simulate the effect.
✅ How to Underline Text on Facebook (Step-by-Step)
Step 1: Find an Underline Text Generator
Search for “underline text generator” or “Facebook text formatter.” Free online tools will instantly convert your input into Unicode underlined text.
In fact, our underline text tool is the easiest you can use out there.
Step 2: Type Your Text
Enter the word, phrase, or sentence you want to underline.
Example: typing Hello World will generate → H̲e̲l̲l̲o̲ W̲o̲r̲l̲d̲
Step 3: Copy the Formatted Version
Most generators provide multiple underline styles (solid, dotted, double). Click “Copy” to copy the underlined version to your clipboard.
Step 4: Paste into Facebook
Go to your post, comment, message, or bio, paste the underlined text, and publish. It will display correctly across most devices and browsers.
📌 When to Use Underlined Text on Facebook
- Highlight key phrases → Example: *The sale ends t̲h̲i̲s̲ ̲F̲r̲i̲d̲a̲y̲!
- Draw attention to calls-to-action → “Click below to join our group!”
- Create visual emphasis → Useful for standing out in long posts.
- Mimic links → While Facebook auto-underlines links, you can style regular words for humor or design purposes.
⚠️ Limitations of the Underline Trick
- Not true links → Underlined words won’t become clickable unless you attach a URL.
- Compatibility issues → Rarely, older browsers or devices may not display Unicode underlines correctly.
- Accessibility → Heavy underline usage may confuse screen readers or users who rely on accessibility tools.
✅ Final Thoughts
While Facebook doesn’t have a built-in underline feature, the Unicode workaround is a simple and effective solution.
By using an underline text generator, you can add visual emphasis, highlight important points, and make your Facebook posts more engaging.
❓ FAQ: Underline on Facebook
Can I underline text in Facebook posts?
Not natively. You need to use a Unicode underline generator and paste the styled text.
Does underline work in Facebook ads?
Not reliably. Facebook Ads Manager may strip unsupported Unicode. Stick with bold or emojis for ad copy.
Will everyone see the underline?
Yes, on most modern devices. A small number of older browsers may display the text incorrectly.
👉 Want to try it right now? Use a free Underline Text Generator and paste your styled text into Facebook to see the effect instantly.