Free trialTry Starter or Influencer free for 2 days.Start free trial →

Twitter (X) Bold Text Generator

X has no bold button. Type your text here and copy it in bold, italic, strikethrough or underline. The styles are Unicode characters, so they paste into posts, replies, bios and display names.

  • Bold, italic, strike, underline
  • Shows the X character cost
  • Works in posts, bios and names
  • Nothing leaves your browser

How to write bold text on X

  1. Type or paste your text. Letters and digits are converted; punctuation, emoji and most accented letters stay as they are.
  2. Pick a style. Sans bold is the most readable on X. Serif bold and italic look more formal. Strikethrough and underline are combining marks, which render on nearly every device.
  3. Copy and paste into X. Paste into the compose box, your bio or your name. Keep bold to a few words; a whole post in bold reads as shouting and lowers replies.

Which bold works best on X?

StyleLooks likeBest for
Sans bold𝗕𝗼𝗹𝗱 𝘁𝗲𝘅𝘁Hooks, headings inside threads, key numbers. Matches X's own font.
Serif bold𝐁𝐨𝐥𝐝 𝐭𝐞𝐱𝐭Quotes, book or article titles.
Italic𝘐𝘵𝘢𝘭𝘪𝘤 𝘵𝘦𝘹𝘵Emphasis on a single word, asides.
Bold italic𝘽𝙤𝙡𝙙 𝙞𝙩𝙖𝙡𝙞𝙘Strong emphasis, one phrase per post at most.
StrikethroughS̶t̶r̶i̶k̶e̶Corrections, "before and after" jokes, price drops.
UnderlineU̲n̲d̲e̲r̲l̲i̲n̲e̲Rare on X; reads as a link, so use sparingly.

Three rules for formatted posts

  • One styled phrase per post. Bold works because it contrasts with plain text. A whole bold post has no contrast and reads as shouting.
  • Plain text for anything searchable. Names, hashtags, product names and keywords stay plain, or search and mentions will not match them.
  • Watch the count. Every styled letter costs two characters. A 140-character post becomes 280 in full bold. The counter on each card shows the cost.

Bold Text Generator: FAQ

How do you make text bold on Twitter?

X does not have formatting controls, so bold text is made with Unicode "Mathematical Bold" letters, which are separate characters that look like bold versions of A to Z and 0 to 9. Type your text in this tool, copy the bold line and paste it anywhere on X. X Premium added formatting for long posts, but the Unicode method works for everyone and in every field.

Does bold text count more characters?

Yes. X counts most characters above U+10FF as two, and the bold letters live in that range, so a bold word costs about twice its length. The counter next to each style shows the real cost against the 280 limit.

Is bold text bad for reach or accessibility?

Screen readers read many of these characters letter by letter or skip them, so keep bold to a short phrase and never the whole post. There is no evidence X penalises Unicode styling, but posts that are hard to read get fewer replies, which does affect distribution.

Why does the bold text show as boxes for some people?

Very old devices and some fonts do not include the Mathematical Alphanumeric block. Sans bold and serif bold have the widest support; small caps and the framed styles are the most likely to show boxes.

Can I use bold text in my X display name?

Yes, bold, italic and small caps all work in display names and bios, within the 50-character name limit. Underline and strikethrough use combining marks, which some name fields strip; test and save once to check.

Can I search for bold text on X?

No. X search treats bold letters as different characters from the plain ones, so a bold word will not match a search for the plain word. Keep keywords and hashtags in plain text.

More free X tools and guides