How bold text gets into a Facebook post
Facebook strips formatting from statuses and comments. Paste a bold line from Word or Google Docs and the bold is gone before you hit Post. The letters on this page survive the paste because they carry no formatting at all. Each one is a separate character from Unicode's Mathematical Alphanumeric Symbols block, U+1D400 to U+1D7FF, added in Unicode 3.1 in 2001 for math notation. 𝐁 is code point U+1D401, a different character from B in the same way 7 differs from 8.
Load sample fills the box with a three-line Toolexe update. In Everything mode the whole post turns bold except toolexe.com/text and #TextTools, which stay plain so Facebook keeps them clickable. Switch Apply bold to First line and the preview drops back to a bold headline over plain body text, with the starred phrase still bold. Post the second version. A fully bold post reads like shouting and takes longer to scan.
Four bold styles, side by side
| Style | Looks like | Capital A starts at | Digits |
|---|---|---|---|
| Serif | 𝐁𝐨𝐥𝐝 𝟐𝟎𝟐𝟔 | U+1D400 | Bold serif |
| Sans | 𝗕𝗼𝗹𝗱 𝟮𝟬𝟮𝟲 | U+1D5D4 | Bold sans |
| Serif italic | 𝑩𝒐𝒍𝒅 𝟐𝟎𝟐𝟔 | U+1D468 | Upright bold serif |
| Sans italic | 𝘽𝙤𝙡𝙙 𝟮𝟬𝟮𝟲 | U+1D63C | Upright bold sans |
Facebook draws its interface in a sans-serif system font, so Sans blends into the feed and reads like part of the page. Serif stands out more against everything around the post. Unicode never encoded italic digits, so both italic styles borrow upright bold numbers, and a year inside an italic headline sits straight.
Pick how much turns bold
- Everything bolds every letter and digit. Fine for a one-line comment or a short Page bio. Wrong for a five-paragraph post.
- First line bolds the opening line and leaves the rest plain. Facebook cuts long posts behind a See more link, so the first line is the headline people read before deciding to tap.
- Starred words bolds only text wrapped in asterisks, the same rule WhatsApp uses. Type
Doors open at *7 pm*and only 7 pm turns bold. The asterisks drop out of the result. A star next to a space, as in5 * 3, is left alone.
Starred words work in every mode. In First line mode, a starred phrase further down the post still comes out bold.
Why links and hashtags stay plain
Facebook turns only plain-letter addresses, names and tags into links. 𝐭𝐨𝐨𝐥𝐞𝐱𝐞.𝐜𝐨𝐦 is not a web address to Facebook, @𝐒𝐚𝐫𝐚 tags nobody, and #𝐒𝐚𝐥𝐞 is a different hashtag from #Sale. With Keep links plain ticked, the converter skips anything starting with http, www, @ or #, plus words ending in a domain such as .com, .org or .io. Untick the box when you want a URL to look bold and don't need the link.
What bold letters cost you
- Screen readers. VoiceOver and NVDA often read 𝐒𝐚𝐥𝐞 as "mathematical bold capital S, mathematical bold small a" or skip the word. A post bold from top to bottom turns into noise for a blind reader. Keep bold to a headline and never put the one key detail, like a date or a price, in bold alone.
- Search. Facebook search and Ctrl+F treat 𝐒𝐚𝐥𝐞 and Sale as different words. A bold product name won't come up when someone searches for the plain name.
- Length. Each bold letter is one character to you and two UTF-16 units to software. Facebook's 63,206 character post limit leaves room, but X weighs each bold letter as two of your 280. The stats line under the preview shows both counts.
- Accents and other alphabets. Unicode has bold A to Z, a to z and 0 to 9 in these styles, nothing more. Café comes out as 𝐂𝐚𝐟é, and Cyrillic, Arabic or Hindi text stays plain. The stats line lists every letter left unconverted.
- Profile names. Facebook's name standards turn away symbols and mixed character styles, so a bold profile name usually fails at save. Put bold in posts, comments and a Page bio instead.
- Missing fonts. A phone or smart TV without a math font draws empty boxes in place of bold letters. Nothing in the post is broken. The reader's device lacks the glyphs.
Strip bold back out
Make plain turns bold text back into normal letters. Paste output from this page or from any bold, italic, script or double-struck generator and press the button. Under the hood the box runs Unicode NFKC normalization, which maps 𝐁, 𝘽 and 𝔅 back to B. Use Make plain before editing an old post, before pasting a bold headline into an email subject, or to get a searchable copy of a name. NFKC also flattens full-width letters such as A, splits ligatures such as fi, and turns ² into 2, so check the result if the text held any of those.
When native bold beats pasted bold
Use the app's own bold
WhatsApp and Slack bold *text* in single asterisks. Discord and Reddit bold **text** in double. Some Facebook Group post editors show a bold button when you highlight words. Real formatting reads correctly for screen readers and search, so pick native bold wherever the app offers a button or a syntax for one.
Paste bold from here
Facebook statuses, comments and Page bios. Instagram captions and bios. LinkedIn posts, which have no bold option outside articles. TikTok and YouTube descriptions. Any field with no formatting bar.