X (Twitter) Font Generator

Why styled letters cost double on X

X weighs every character, and styled letters weigh 2. Its open-source twitter-text configuration gives code points 0 to 4,351 (plus 3 small punctuation ranges) a weight of 1 and everything else 2. Bold, italic and script letters come from Unicode's Mathematical Alphanumeric Symbols block (plus a few from Letterlike Symbols), far above that line.

So "Grand opening Friday" counts 20 toward the 280, and "𝐆𝐫𝐚𝐧𝐝 𝐨𝐩𝐞𝐧𝐢𝐧𝐠 𝐅𝐫𝐢𝐝𝐚𝐲" counts 38. A post written entirely in bold fits about 140 letters. Small capitals are the cheap exception: "Gʀᴀɴᴅ ᴏᴘᴇɴɪɴɢ Fʀɪᴅᴀʏ" counts 27, because some of those letters sit inside the low range. Links and emoji follow their own rules, so to check a whole post use the Twitter character counter.

Which X fields take styled text

Only the username is documented as plain text only. For posts, replies, the bio and the display name, X's help pages (checked October 2, 2026) say nothing either way, so people paste styled text there without a published rule behind it.

X words the username minimum two ways: one help page says a username "must be more than 4 characters long", while another, contrasting the display name with the username, says your name "can be longer (50 characters) or shorter than 4 characters", which implies usernames have a floor of 4. Here is what X's username rules make of a few examples (a 4-character handle passes, with a warning):

• @𝐛𝐫𝐚𝐧𝐝𝐧𝐚𝐦𝐞: Only letters (A–Z), numbers (0–9) and underscores (_). Remove any spaces, emoji, styled letters or other symbols.
• @shopadmin: X says usernames containing the word Admin cannot be claimed.
• @mytwitterbrand: Before the rebrand, X's help said usernames containing “Twitter” cannot be claimed. The current page no longer says so explicitly; expect it to be refused.
• @abcd: One X help page says usernames must be “more than 4 characters”; a 4-character handle may be refused.
• @brand_hq: fits the rules.

Need a plain handle? Try the X username generator.

How to use the X font generator

1. Type or paste your text. Already-styled text is turned back into plain letters first.
2. Choose where it goes on X. Post, reply, bio, display name or username: the count and the verdict switch to that field.
3. Compare the styles. Each row shows its output and what it costs; Preview puts it in the mock-up card.
4. Copy and paste it into X. Keep a plain version: "Convert back to plain text" gives you one.

What font does X (Twitter) use?

Chirp. Chirp is the typeface X (then Twitter) introduced in 2021 as its own custom typeface. Before Chirp, the company says it relied on others' typefaces: SF Pro and Roboto in the product, Helvetica Neue in the brand. That comes from a 2021 post by Derrit DeRouen introducing Chirp; X's accessibility account also posted about Chirp issues for Windows users that year.

A font generator does not change the typeface X uses. Styled letters are separate characters, so the reader's device draws them with whatever font it has that contains them.

Styled text, search and screen readers on X

Styled text is made of Unicode symbols, not fonts. Screen readers may read the symbols one by one or skip them, search may not match them, and some devices show them as empty boxes. Use them sparingly, and never for information people need.

On X, keep hashtags, @mentions, links and the words you want found in plain letters. An @mention only works with the real handle, which can never contain styled letters, and a styled keyword is a different string from the plain word people type into X search. Use a style for one word or a short hook, and write the rest of the post normally, since plain words are what X search and Google can find. Paste links in afterwards: a styled web address is no longer that address. Strikethrough and underline add a mark after every character, emoji included, which can split a flag or a multi-part emoji.