Bold text generator for LinkedIn, Instagram and X, with italic and bold italic

How Unicode bold and italic text works

Most social networks strip formatting from posts. There is no bold button in a LinkedIn post or an Instagram caption, and pasted bold from Word or Google Docs turns back into plain text.

Unicode, the standard that defines every character your phone can show, includes a set called Mathematical Alphanumeric Symbols. It was added for math notation, and it holds separate letters that look bold, italic and bold italic. The generator replaces each letter you type with its twin from that set: A becomes 𝐀 in bold, 𝐴 in italic and 𝑨 in bold italic. Because the result is ordinary characters, not formatting, it survives copy and paste into any text box that accepts Unicode.

How to bold text on each platform, natively or with Unicode

Use native formatting where it exists. It is real bold, so screen readers and search handle it normally. Use Unicode only where there is no other way.

• LinkedIn posts and comments: no native bold, so Unicode is the only way. LinkedIn articles and newsletters have a full editor with bold and italic.
• Instagram captions, bios and comments: no native bold. Unicode works in captions, bios, the display name and comments, but not in the @username.
• X: Premium subscribers get bold and italic in the web composer for posts. Free accounts, bios and DMs need Unicode.
• Facebook: no bold in regular posts. Group admins get a rich-text editor with bold, italic and headings, and Messenger supports *bold* and _italic_. Elsewhere, use Unicode.
• TikTok and Threads: no native bold. Unicode shows in captions, bios and comments.
• WhatsApp: native. Type *bold*, _italic_ or ~strikethrough~. No generator needed.
• Discord, Slack and Telegram: native markdown. Discord and Telegram use **bold**, Slack uses *bold*.

Where Unicode bold breaks

The characters display on current iOS, Android, macOS and Windows, but the font on each device draws them, so the same text looks slightly different from phone to phone. Old devices and some smart TVs show empty boxes or question marks instead.

• Usernames and handles: most networks accept only plain letters, numbers and a few symbols there.
• Hashtags: #𝐜𝐨𝐟𝐟𝐞𝐞 is not the same tag as #coffee, so the post will not show under the plain tag.
• Search: people searching for the plain word may not find a styled one, on the network or on Google.
• Character limits: each styled letter is 2 characters on X, so a bold line uses the 280-character limit twice as fast.

Accessibility: screen readers and styled letters

A screen reader sees 𝐂𝐨𝐟𝐟𝐞𝐞 as six math symbols, not a word. Depending on the software, it reads each one out, often as something like "mathematical bold capital C", or it skips them. A whole post in bold becomes noise for a blind reader, and the same goes for a bold name in your bio.

Keep it short. Bold one word, a price or a short heading, and write the rest in plain text. Never put the only copy of important information, such as a date, a price or a link description, in styled letters alone. If a line must stand out for everyone, a line break, a capitalized word or an emoji at the start does the job without breaking screen readers.

Examples for a coffee roaster

Here is how the fictional roaster Acme Coffee could use the three styles, one short phrase at a time, with everything else plain.

• Instagram bio: 𝐀𝐜𝐦𝐞 𝐂𝐨𝐟𝐟𝐞𝐞 | Small-batch roaster on Main Street | Roasted Tuesday, shipped by Thursday
• LinkedIn post, first line: 𝐖𝐞 𝐬𝐭𝐨𝐩𝐩𝐞𝐝 𝐫𝐨𝐚𝐬𝐭𝐢𝐧𝐠 𝐭𝐨 𝐬𝐭𝐨𝐜𝐤. Every bag now ships within 48 hours of roasting.
• Instagram caption heading: 𝑻𝒂𝒔𝒕𝒊𝒏𝒈 𝒏𝒐𝒕𝒆𝒔: blueberry, jasmine, honey.
• X post: New Guji is in. 𝐿𝑖𝑚𝑖𝑡𝑒𝑑 to 200 bags, roasted Tuesday.
• Facebook post: 𝐍𝐨𝐰 𝐨𝐩𝐞𝐧 on Sundays at the Main Street café, 8 to 2.