Bluesky Text Formatter: Bold & Italic Text

Bluesky has no bold button and doesn't read markdown. This Bluesky bold text formatter turns your words into Unicode bold, italic and strikethrough that paste into posts, replies, your bio and your display name, with a live preview and a counter that counts the way Bluesky does.

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Formats inside the bsky.app composer. Also works on LinkedIn, X, Facebook, Threads & YouTube.

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Graphemes used of Bluesky's 300 per post: 0 / 300

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Alex Morgan@alexmorgan.bsky.social· 1h

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Graphemes used of Bluesky's 300 per post: 0 / 300

Short version · Updated October 2026

Bluesky has no native bold or italic. Its rich text only covers mentions, links and hashtags, and markdown like **bold** posts as typed. To bold text on Bluesky, paste Unicode characters such as 𝗯𝗼𝗹𝗱 or 𝘪𝘵𝘢𝘭𝘪𝘤, which the formatter above makes.

Each styled letter counts as 1 of the 300 graphemes a post allows, the same as a plain letter. Styles also work in your display name (64 graphemes) and bio (256), but not in your handle.

What you can format on Bluesky, and the limits

Every limit below comes from the AT Protocol lexicons, the schema Bluesky's servers check posts and profiles against. Each text field has two caps: graphemes (the characters a reader sees) and UTF-8 bytes.

Field	Native formatting	Graphemes	Bytes	Unicode styles
Post, reply, quote post	None (only mentions, links, hashtags)	300	3,000	Work
Display name	None	64	640	Work
Bio (description)	None	256	2,560	Work
Pronouns	None	20	200	Work
Handle	None	A domain name	n/a	Don’t work: plain letters, digits, hyphens only

Source: AT Protocol lexicons app.bsky.feed.post, app.bsky.actor.profile and app.bsky.richtext.facet in the current @atproto/api package. Checked 15 October 2026.

How Bluesky counts bold and italic characters

Bluesky's composer counts graphemes, not code points or bytes. That's good news for styled text: a bold letter is one grapheme, and so is a struck-through letter even though it's two code points. Unlike X, where a styled letter counts as 2 of 280, on Bluesky it's 1 of 300. Measured from this tool's output:

Style	Example	Code points per letter	Graphemes per letter	UTF-8 bytes per letter
Plain	Bluesky	1	1	1
Bold	𝗕𝗹𝘂𝗲𝘀𝗸𝘆	1	1	4
Italic	𝘉𝘭𝘶𝘦𝘴𝘬𝘺	1	1	4
Bold italic	𝘽𝙡𝙪𝙚𝙨𝙠𝙮	1	1	4
Strikethrough	B̶l̶u̶e̶s̶k̶y̶	2	1	3
Underline	B͟l͟u͟e͟s͟k͟y̲	2	1	3
Small caps	ʙʟᴜᴇꜱᴋʏ	1	1	3
Monospace	𝙱𝚕𝚞𝚎𝚜𝚔𝚢	1	1	4

300 graphemes of the heaviest style here take 1,200 bytes, well under the 3,000-byte cap, so with styled text the grapheme limit is always the one you reach. Emoji are where bytes matter: the family emoji 👨‍👩‍👧 is one grapheme but 18 bytes.

Why markdown and asterisks don’t work on Bluesky

A Bluesky post is stored as plain text plus a list of facets: byte ranges that say "this part is a mention", "this part is a link" or "this part is a hashtag". Those three are the only facet types the protocol defines. There's no facet for bold, italic or headings, so the official app has nothing to render them with, and **bold** or _italic_ stay as typed.

Unicode styling doesn't need the app's help, because the letters are different characters. That's also why it carries over when you cross-post the same text to Threads or X.

How to Bold Text on Bluesky

There's nothing to switch on in Bluesky: the styling is in the characters themselves. Write the post here, style the words that matter and paste the result into the composer.

Type or paste

Write the post, reply or bio in the editor above.

Select text

Highlight the words to style, or leave nothing selected to style it all.

Pick a style

Bold, Italic, Strikethrough, Underline or a font from the menu.

Copy & paste

Click Copy and paste into bsky.app or the Bluesky app.

The counter under the editor shows graphemes out of 300, the unit Bluesky's own composer counts. Bold and italic come from the Mathematical Alphanumeric Symbols block (U+1D400 to U+1D7FF), strikethrough adds U+0336 after each letter. It's plain text, so other Bluesky apps show it too, as long as the device's font has the glyphs.

Single styles:

Bold text generator Italic text generator Strikethrough generator

Bluesky Font Styles

8 styles in this free formatter. The Chrome extension has 20+ more.

𝗛𝗲𝗹𝗹𝗼 𝗪𝗼𝗿𝗹𝗱

Bold

The opening line of a post or the first post of a thread.

𝘏𝘦𝘭𝘭𝘰 𝘞𝘰𝘳𝘭𝘥

Italic

Book and film titles, quotes, a quiet aside.

𝙃𝙚𝙡𝙡𝙤 𝙒𝙤𝙧𝙡𝙙

Bold Italic

One phrase you want read first.

H̶e̶l̶l̶o̶ ̶W̶o̶r̶l̶d̶

Strikethrough

Corrections and jokes that need the crossed-out word.

H͟e͟l͟l͟o͟ ͟W͟o͟r͟l͟d̲

Underline

A label or a call to action.

𝙷𝚎𝚕𝚕𝚘 𝚆𝚘𝚛𝚕𝚍

Monospace

Commands, file names, a version number.

𝓱𝓮𝓵𝓵𝓸 𝔀𝓸𝓻𝓵𝓭

Script

A display name that looks hand-written.

ʜᴇʟʟᴏ ᴡᴏʀʟᴅ

Small Caps

Bio labels like ᴡʀɪᴛᴇʀ or ʙᴀꜱᴇᴅ ɪɴ.

Why Style Text on Bluesky?

Bluesky feeds are chronological and text-heavy. With 300 graphemes per post, a bold first line is how a skeet gets read instead of skimmed.

Thread openers

Bold the first post of a thread so readers know it continues.

Readable lists

A bold label per line turns a dense post into something scannable.

Display name and bio

64 and 256 graphemes, and Unicode styles work in both.

Same text elsewhere

Cross-post to Threads or Mastodon and the styling comes along.

Search

Styled letters are different characters, so a search for the plain word may not find them.

Screen readers

Some read Unicode bold letter by letter. Style a phrase, not the whole post.

Handles and hashtags

Keep @handles, links and #tags plain so they stay mentions, links and tags.

Style Posts Right in the Bluesky Composer

If you post on Bluesky every day, copy and paste gets old. The Post Formatter Chrome extension adds the toolbar to the composer on bsky.app. Bold, italic, strikethrough and underline are free; Pro adds the premium styles, a Bluesky post preview and Smart Paste.

Inline toolbar in the bsky.app composer
30+ styles, including the 8 on this page
Post preview with a Bluesky view

Shortcuts: Ctrl+B, Ctrl+I, Ctrl+U
Smart Paste keeps bold and italics from Google Docs or Word
Same toolbar on LinkedIn, X, Facebook, Threads, YouTube and Pinterest

Add to Chrome, It's Free

Bluesky Formatting FAQ

Updated October 2026

Can you bold text on Bluesky?

Not with a button: Bluesky has no bold, italic or underline option in posts. What works is Unicode text, letters from the Mathematical Alphanumeric Symbols block that look bold or italic. Style your text in the formatter above, copy it and paste it into the Bluesky composer.

Does Bluesky support markdown?

No. Typing **bold** or *italic* in the Bluesky app posts the asterisks as they are. A Bluesky post is plain text plus facets, byte ranges that mark mentions, links and hashtags, and the protocol defines no facet for bold or italic.

Do bold letters count more toward the 300 limit?

No. Bluesky counts graphemes, the characters a reader sees, so a bold letter counts as 1, the same as a plain one. Strikethrough letters are two code points each but still one grapheme. The second limit, 3,000 bytes, only matters for heavy emoji; 300 styled letters take at most 1,200 bytes.

Can I use bold or fancy fonts in my Bluesky display name and bio?

Yes. The display name allows 64 graphemes and the bio 256, and Unicode styles work in both. Your handle is different: it is a domain name like alex.bsky.social, which only takes plain letters, digits and hyphens, so it can’t be styled.

Will styled text show in other Bluesky apps?

Yes. The styling is stored in the post as ordinary Unicode text, so any app that reads Bluesky posts shows it, on the web, iOS and Android. The only exception is a device whose font lacks the glyphs, which then shows empty boxes.

Should I style hashtags and mentions?

No. A styled hashtag is made of different characters, so it no longer matches the plain tag people follow, and a styled @handle doesn’t resolve to an account. Style the words around them instead.

Is this Bluesky text formatter free?

Yes. No account, no limit, and the text never leaves your browser. In the Post Formatter Chrome extension, bold, italic, strikethrough and underline are free on all seven platforms; Pro adds the 20+ premium styles, post previews, Smart Paste and the AI features.