Multi-Platform Social Media Text & Bio Font Formatter
Make text bold, italic, underlined, strikethrough or monospace for Instagram, Facebook, LinkedIn, X, Threads and TikTok. You get the same text in native *bold* markup for WhatsApp, Telegram, Discord and Slack. Each platform's real character limit is checked, and a style gallery lets you copy any of 17 styles. One click turns everything back into plain text.
Your text select words, then pick a style
Style gallery preview of your text
Ready for each platform
Text to copy
How it will look
Quick answer: Instagram, Facebook, LinkedIn, X, Threads and TikTok posts have no bold or italic buttons. To format text, you use Unicode look-alike letters (𝗯𝗼𝗹𝗱, 𝘪𝘵𝘢𝘭𝘪𝘤, u̲n̲d̲e̲r̲l̲i̲n̲e̲, s̶t̶r̶i̶k̶e̶) that you copy and paste. WhatsApp, Telegram, Discord and Slack have real formatting that uses symbols like *bold* or **bold**. The formatter above gives you the right version for each app.
How to Format Text for Social Media
- Type or paste your text: Write a caption, post, bio or message in the editor.
- Style the words that matter: Select a word or line and click Bold, Italic, Underline, Strikethrough or another style from the gallery.
- Pick the platform: Open the tab for Instagram, Facebook, LinkedIn, X, Threads, TikTok, WhatsApp, Telegram, Discord or Slack.
- Check length and warnings: Each tab shows the platform’s own character count, limit and hashtag rules.
- Copy and paste: Click Copy for that platform and paste into the app. Unicode styles are kept for social apps; chat apps get their native *bold* markup.
You can also write the way you would in a notes app, like **bold**, *italic*, ~~strike~~ and `code`, and click Convert **Markdown**. The markers become Unicode styles for social apps, and native markup is rebuilt automatically for chat apps.
How to Make Social Media Text Bold
| Platform | How bold works | What to do |
|---|---|---|
| Instagram, Facebook, LinkedIn, Threads, TikTok | No native bold in posts or captions | Use Unicode bold (𝗕𝗼𝗹𝗱) from the formatter |
| X | No bold in normal posts; X Premium adds bold and italic for longer posts | Unicode bold, keeping in mind each bold letter counts as 2 of the 280 characters |
Native: *text* | Copy from the WhatsApp tab | |
| Telegram | Native: **text** or the formatting menu | Copy from the Telegram tab |
| Discord | Markdown: **text** | Copy from the Discord tab |
| Slack | Markup: *text* | Copy from the Slack tab |
The sans-serif bold style (𝗕𝗼𝗹𝗱) blends in best with the fonts most apps use. Serif bold (𝐁𝐨𝐥𝐝) looks more formal. Both are in the gallery.
How to Make Social Media Text Italic
Select the words and click 𝘐. The formatter uses sans-serif italic (𝘪𝘵𝘢𝘭𝘪𝘤) by default; the gallery also has serif italic (𝑖𝑡𝑎𝑙𝑖𝑐). Serif italic has a gap in Unicode: there is no italic "h" in the math block, so the formatter uses the Planck constant symbol ℎ, which looks the same. Cheaper tools leave an empty box there. In chat apps, italic is native: _text_ in WhatsApp and Slack, __text__ in Telegram, and *text* in Discord.
How to Add Strikethrough Text to Social Posts
Strikethrough is made by adding the combining character U+0336 after every letter (s̶t̶r̶i̶k̶e̶), which draws a line through it. It's popular for before-and-after prices ($̶4̶9̶ $29) and self-corrections. Native options: ~text~ in WhatsApp and Slack, and ~~text~~ in Telegram and Discord.
How to Add Underlined Text to Social Media
Underline uses the combining low line U+0332 after each letter (u̲n̲d̲e̲r̲l̲i̲n̲e̲). On some fonts, the line breaks between letters or sits a little low. Of the chat apps, only Discord has native underline (__text__). Telegram supports it from the formatting menu, and WhatsApp and Slack have none, so the formatter leaves underline off for those.
How to Add Line Breaks to Social Media Posts
- Instagram, Facebook, LinkedIn, Threads: press Enter for each new line. If blank lines disappear after posting, tick Lock blank lines. It puts an invisible Braille-blank character (⠀, U+2800) on each empty line, which the apps don't remove.
- X: line breaks are kept, and each one counts as 1 character.
- WhatsApp, Telegram, Slack: use Shift+Enter on desktop so you don't send the message early.
- Discord: Shift+Enter for a new line. Blank lines are kept.
Use Tidy spacing to remove double spaces, trailing spaces and runs of more than one empty line before you copy.
How Unicode Text Formatting Works
Unicode is the standard list of every character computers can show. It includes a block called Mathematical Alphanumeric Symbols (U+1D400–U+1D7FF), originally for maths notation. It has complete alphabets in bold, italic, script, fraktur, double-struck and monospace. The formatter swaps each normal letter for its look-alike from that block:
| You type | Style | Becomes | Code point |
|---|---|---|---|
| A | Bold (sans) | 𝗔 | U+1D5D4 |
| a | Italic (sans) | 𝘢 | U+1D622 |
| R | Double-struck | ℝ | U+211D (a Letterlike Symbol, because the math block has a gap here) |
| 1 | Circled | ① | U+2460 |
| e | Underline | e̲ | U+0065 + U+0332 |
Because these are different characters, not a font setting, they survive copy and paste into any app that accepts text. The same fact causes the downsides: search, screen readers and translation don't treat them as normal letters.
How to Format the Same Text for Multiple Social Platforms
- Write and style the text once in the editor.
- Open each platform tab. The social apps keep the Unicode styles; WhatsApp, Telegram, Discord and Slack get native markup built from the same styles (bold →
*bold*or**bold**). - Check each tab's pill: character count, limit, and hashtag or mention warnings.
- Shorten the X version if it goes past 280 weighted characters. Styled letters and emojis count double there.
- Copy and post.
Social Media Text Formatting for LinkedIn, Instagram, Facebook and X
| Platform | Text limit | Native formatting | Tips |
|---|---|---|---|
| 3,000 characters per post | None in posts | Bold a hook line or key words; about 210 characters show before "see more" on desktop | |
| 2,200 characters per caption; 150 in bio; max 5 hashtags per post | None | Styled bio names look good, but people search your plain username | |
| 63,206 characters per post | None in normal posts | Long posts get cut off in the feed; lead with the key line | |
| X | 280 weighted characters (25,000 with Premium); 160 in bio | Bold and italic for Premium long posts | Styled letters, emojis and CJK count as 2; links count as 23 |
| Threads | 500 characters | None | Keep styling light; posts are short |
| TikTok | 4,000 characters per caption | None | Only the first line or two show over the video |
| Long messages allowed | *bold* _italic_ ~strike~ ```mono``` `code`, lists, > quote | Native markup is searchable and accessible | |
| Discord | 2,000 characters per message (more with Nitro) | Markdown, including __underline__ and ||spoiler|| | Use # Heading for headings |
Why Formatted Text May Look Different on Different Devices
- Fonts: each phone and computer draws the characters with its own fonts. Bold from Apple's font looks slightly different from Google's or Microsoft's.
- Missing characters: old Android versions, some smart TVs and some in-app browsers don't have fonts for every symbol and show boxes (□) or question marks.
- Emoji rendering: squared letters (🅰) can turn into coloured emoji on some systems.
- Combining marks: underline and strikethrough lines may break between letters or sit at different heights.
- App filters: some apps block special characters in names, usernames or ads. The text is removed or the field is rejected.
For important posts, stick to sans-serif bold and italic. They have the widest support.
Unicode Text vs. Normal Font Formatting
| Unicode styled text | Normal (native) formatting | |
|---|---|---|
| Where it works | Anywhere you can paste text | Only apps that support it (Word, WhatsApp, Discord…) |
| Searchable | No, it doesn't match normal words | Yes |
| Screen readers | Often read wrongly or skipped | Read normally |
| Character count | Often counts double (X) | Normal |
| Copy into another app | Stays styled | Style usually lost |
| Best for | A few highlighted words, headings, names in bios | Everything in apps that support it |
Common Social Media Text Formatting Problems
| Problem | Cause | Fix |
|---|---|---|
| Hashtag stops working | The hashtag was styled | Keep hashtags plain; the checker flags styled ones |
| @mention doesn't link | The mention was styled or pasted | Type @ and pick the person in the app |
| Some letters are boxes | Unicode gap or missing font | This formatter fills the known gaps (ℎ, ℝ, ℭ…); otherwise pick bold or italic |
| X says the post is too long | Styled letters and emojis count as 2 | Use the X tab's weighted count; style fewer words |
| Asterisks show in WhatsApp | A space right inside the markers (* bold*) | The WhatsApp tab places markers tight against the words |
| Blank lines vanish | The app collapses empty lines | Tick "Lock blank lines" |
| Text reads oddly aloud | Screen reader meets math symbols | Style less text; use native formatting where available |
How to Remove Unicode Formatting and Return to Plain Text
- Paste the styled text into the editor.
- Click Plain text (remove all styles), or select part of it and click Aa plain.
- Copy the result.
This reverses every style the formatter makes, including the Letterlike-symbol replacements, circled and squared letters, full-width text, small caps, and underline and strikethrough marks. Emojis, accents and other symbols are left untouched. It's handy for making a styled bio searchable again, or cleaning text copied from someone else's post.
Free Social Media Text Formatter FAQs
How do I make text bold on Instagram, Facebook, LinkedIn or X?
These apps have no bold button in posts, so the formatter swaps your letters for look-alike Unicode characters that display as bold, such as 𝗕𝗼𝗹𝗱. Type your text, select the words, click Bold, then copy it from the Instagram, Facebook, LinkedIn or X tab and paste it into the app.
Why doesn’t Unicode bold work the same in WhatsApp, Telegram, Discord or Slack?
Those apps have real formatting built in, using symbols. WhatsApp uses *bold*, _italic_ and ~strikethrough~, while Discord and Telegram use **bold**. The formatter converts your styled text into each app’s own markup, which is readable by screen readers and searchable.
Does formatted text count as more characters?
Often, yes. X counts every Unicode-styled letter and every emoji as 2 characters, so a 280-character limit fits only about 140 bold letters. Other apps store each styled letter as two code units. The tool shows each platform’s count and limit.
Why does my formatted text show boxes or question marks?
The device or app doesn’t have a font with that character. Math bold, italic and monospace work on almost all modern phones and computers. Rarer styles such as squared letters, some small caps and older Android versions are the most likely to show boxes. Stick to bold and italic for important posts.
Is Unicode text bad for accessibility and SEO?
Screen readers may read styled letters one by one, or as math symbols, and search features (including hashtag and profile search) won’t match them to normal words. Use styles for a few words at most, never for hashtags, names or keywords people search for. The checker warns you when too much text is styled.
How do I remove Unicode formatting?
Paste the styled text into the editor and click Plain text. Bold, italic, script, fraktur, double-struck, monospace, circled, squared, full-width, small caps, underline and strikethrough characters are all turned back into normal letters and numbers.
Can I underline or strike through text on social media?
Yes. Underline and strikethrough use combining characters (U+0332 and U+0336) placed after each letter. They work on most platforms but can look uneven on some fonts. WhatsApp, Discord, Telegram and Slack have native strikethrough, and Discord has native underline.
How many hashtags can I use on Instagram?
Instagram limits posts and Reels to 5 hashtags, a rule that rolled out in December 2025. The Instagram tab warns you if you use more. Captions can be up to 2,200 characters.
Is my text stored anywhere?
No. Everything runs in your browser. Your draft is kept only in your own browser so it is still there if you refresh the page.
Resources and Sources
- Unicode Mathematical Alphanumeric SymbolsThe official chart for bold, italic, script and other styled letters.
- X: Counting charactersWhy emojis and many symbols count as 2 of the 280 characters.
- X Premium featuresLonger posts and bold and italic for subscribers.
- Discord: Markdown Text 101Official Discord formatting syntax.
- WhatsApp: How to format your messagesOfficial WhatsApp formatting help.
- Instagram's 5-hashtag limitLater: the December 2025 hashtag cap.
- Social media post length by platformHootsuite: character limits for every major network.
- Why fake bold text breaks accessibilityHow screen readers and search handle Unicode styles.
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Last reviewed: September 2026.