LinkedIn doesn't have a bold button. Open the post composer and you'll find a plain text box — no toolbar, no formatting menu, nothing. Yet you've definitely seen posts with bold headlines and italic emphasis stopping your scroll. Here's how they do it, and how you can too.
Why there's no formatting button
LinkedIn stores post text as plain text, so it can't remember "this word is bold" the way a Word document does. The trick people use isn't really formatting at all — it's Unicode.
Unicode (the global standard that defines every character your phone and computer can show) includes special alphabet ranges called Mathematical Alphanumeric Symbols. There's a full bold alphabet (𝐀 𝐁 𝐂…), an italic one (𝐴 𝐵 𝐶…), and a bold-italic one. They were designed for maths equations, but because they're real characters, you can paste them anywhere — including a LinkedIn post.
So when you see a "bold" LinkedIn post, you're not seeing formatted text. You're seeing different characters that happen to look bold.
The manual way (free, but fiddly)
- Write your post in a plain document.
- Open a Unicode text generator (search "LinkedIn bold text generator").
- Type or paste the words you want to emphasise.
- Copy the bold or italic version it produces.
- Paste it back into your LinkedIn post in the right spot.
It works, but it's slow — you're tabbing between your post and a converter, phrase by phrase, every time you write.
Three things to watch out for
- Don't overdo it. A bold headline and one or two emphasised phrases is plenty. A wall of bold text is harder to read, not easier.
- Accessibility. Screen readers often can't read Mathematical Unicode characters properly — they may skip them or read them out oddly. Never put essential information only in bold Unicode; keep your core message in normal text.
- Hashtags and mentions. Don't bold hashtags or @mentions — LinkedIn won't recognise the Unicode versions as real tags or links.
The faster way
If you post regularly, converting text by hand gets old fast. This is one of the small reasons we built Posts8: the editor has a bold (𝐁) and italic (𝐼) toggle built in. Select your text, click the button (or press Ctrl+B / Ctrl+I), and it swaps in the right Unicode characters instantly — and toggles them back off the same way. The character counter even counts by code points, so it matches LinkedIn's real limit instead of over-counting.
Posts8 is an AI-assisted social media manager that writes your posts, generates matching images, and adds LinkedIn-style bold and italic formatting in one click — so small teams can stay consistent on LinkedIn without an agency or a pile of browser tabs.
If staying consistent is the real battle, see how to post consistently on LinkedIn when you have no time and our roundup of the best AI tools for writing LinkedIn posts.
FAQ
Does bold text help LinkedIn posts perform better? Used sparingly, yes — a bold first line or key phrase improves scannability and can lift dwell time. Overused, it hurts readability and looks spammy.
Will bold Unicode break on mobile? No. Because these are standard Unicode characters, they render on virtually every modern phone and browser.
Can I bold text in LinkedIn comments and my headline too? Yes — the same Unicode characters work in comments, your headline, and your About section. The same accessibility caveat applies.
