Bold and italic text, one click from your menu bar.
LinkedIn, X and Slack don't have a bold button. Unicode Styler turns your text into Unicode bold, italic and sans-serif characters that keep their style wherever you paste them.
Free and open source. macOS 13 or later, Apple silicon and Intel. On Windows or Linux? Use the web version.
Unicode Styler
Type above and click any style to copy it. The Mac app does the same thing from your menu bar. On Windows or Linux, bookmark the full web version.
10text styles
1 clickto copy
Offlinenothing leaves your Mac
UniversalApple silicon and Intel
New in v1.1
Settings, and everything on one screen
The gear icon in the panel opens Settings. Your choices are saved and applied every time the app starts.
Light, Dark or System New
Pick an appearance for the panel.
System follows your macOS setting
Light and Dark override it for this app only
Start at login New
One switch adds Unicode Styler to your Mac's Login Items.
Uses the standard macOS Login Items
If macOS asks for approval, a button takes you there
No scrolling New
All 10 styles fit in the panel at once.
Long text is shortened on screen, with the full text on hover
Clicking always copies the full text
Everything the web tools do, without the browser tab
It does the same job as sites like YayText, from your menu bar.
Bold, italic and bold italic
In both serif and sans-serif, with bold digits where Unicode has them.
Four alternating patterns
Alternating Bold, Alternating Italic, Bold with Alternating Italic, and Italic Switch Serifs.
Lives in the menu bar
No Dock icon and no window to manage. Click the icon and the panel opens.
Live preview
Every style updates as you type, so you can see your text in all 10 before you pick one.
Click to copy
A checkmark confirms the copy. Paste and Clear buttons handle the round trip.
PowerShell version too
Convert-UnicodeStyle.ps1 does the same conversion from the terminal on macOS, Windows or Linux.
How it works
The styled text isn't formatting. These are different characters, so the style survives copy and paste into any app that takes text.
You typePlain textHello
Unicode StylerMaps each letterH → U+1D407
You pasteStyled text𝐇𝐞𝐥𝐥𝐨
Unicode's Mathematical Alphanumeric Symbols block (U+1D400 to U+1D7FF) has complete alphabets in bold, italic and sans-serif, made for writing math. Each one starts at a fixed code point, so converting a letter is one addition:
styled = start + (letter − 'A')
Italic h is somewhere else.Unicode already had ℎ as the Planck constant (U+210E), so the italic alphabet has a gap there. The app maps it separately.
Italic styles have no digits.Numbers stay plain in italic. Bold has its own 𝟎 to 𝟗.
Everything else passes through.Spaces, punctuation and emoji are left as they are.
A
Style
Starts at
𝐀
Bold
U+1D400
𝐴
Italic
U+1D434
𝑨
Bold italic
U+1D468
𝗔
Sans bold
U+1D5D4
𝘈
Sans italic
U+1D608
𝘼
Sans bold italic
U+1D63C
Use it for emphasis rather than whole posts. Screen readers may read these characters one at a time, and search won't match 𝐁𝐨𝐥𝐝 to Bold.
Private by design
It's a text converter. It doesn't need anything else.
Works offline
The app makes no network connections. The conversion happens on your Mac.
Nothing collected
No accounts, analytics or tracking. Your text is never saved.
Clipboard on request
It only reads your clipboard when you click Paste, and only writes to it when you click a style.
Open source
One Swift file you can read in a few minutes, and build yourself if you prefer.
Download
About a minute to install. The security step only happens the first time.
Double-click the zip and drag Unicode Styler into Applications.
Open it. macOS will say it can't verify the developer. Follow the steps below.
Click the B/I/U icon in your menu bar, type your text, and click a style.
The app isn't signed with an Apple Developer ID yet, so Gatekeeper blocks it the first time. It isn't damaged. Click Done, go to System Settings › Privacy & Security, and click Open Anyway. Or run this in Terminal:
The web version has all 10 styles, click to copy, keyboard shortcuts, and Light or Dark mode. Bookmark it, or install it from Edge or Chrome so it opens like an app. It works offline once loaded.