UniStyle

Convert plain text into 22 Unicode styles for Discord, Notion, X, Slack, and anywhere Unicode renders. Free. No signup, no tracking, no server.

Try it now

• Web app: unistyle.io - works in any modern browser, installable as a PWA on desktop and Android
• Chrome Extension: Coming soon to the Chrome Web Store

What it does

UniStyle generates real Unicode characters that look bold, italic, scripted, monospace, and more. Because the output is real Unicode (not Markdown), the formatting travels with the text - paste it into Discord usernames, X bios, Slack messages, LinkedIn headlines, anywhere a text field renders Unicode.

Type:

Hello World

Get back:

𝐇𝐞𝐥𝐥𝐨 𝐖𝐨𝐫𝐥𝐝     ← bold
𝐻𝑒𝑙𝑙𝑜 𝑊𝑜𝑟𝑙𝑑     ← italic
𝓗𝓮𝓵𝓵𝓸 𝓦𝓸𝓻𝓵𝓭     ← script
Ｈｅｌｌｏ Ｗｏｒｌｄ     ← fullwidth (vaporwave)

...and 18 more.

Features

• 22 Unicode styles: bold, italic, bold italic, sans-serif bold, sans-serif italic, sans-serif bold italic, underline, strikethrough, monospace, script, fraktur, double-struck, fullwidth, small caps, bubble, upside down, reverse, alternating case, zalgo, subscript, superscript, regional indicator (country flag codes)
• Style combiner: stack a modifier (strikethrough, underline, overline, reverse) on any base style
• Favorites: pin your most-used styles
• History: recent transformations are saved locally
• Special characters row: quick-insert for em dashes, ellipsis, smart quotes, etc.
• Cleanup transforms: Format Sentences, CAPS, lowercase, Title Case, Strip Unicode
• Keyboard shortcuts (extension): Ctrl+Shift+Y opens popup, Ctrl+Shift+U transforms selected text with last-used style, Ctrl+Shift+F opens inline panel
• Right-click context menu (extension): "Format with UniStyle" on any selected text
• PWA installable (web): works offline once installed

How it works

Plain text uses standard Unicode (U+0041 = "A"). UniStyle maps each character to its equivalent in another Unicode block - "Mathematical Alphanumeric Symbols" (U+1D400+) for bold/italic/script/fraktur, "Halfwidth and Fullwidth Forms" (U+FF21+) for fullwidth, "Combining Diacritical Marks" for zalgo, etc. The output is real Unicode that displays styled glyphs anywhere a font renders those code points.

This is different from Markdown formatting (which only works inside platforms that parse it). UniStyle output works in usernames, bios, status fields, third-party clients, and anywhere plain text is accepted.

Privacy

UniStyle runs entirely in your browser. Text typed into the tool is converted locally on your device using JavaScript - nothing is sent to a server, saved to a database, or logged. No analytics capture user input. The optional PWA stores recent inputs in localStorage (on your device only) so the History feature can show recent text; clear at any time via the Clear button.

Full privacy policy: unistyle.io/privacy

Local development

git clone https://github.com/buildwithbaker/unistyle.git
cd unistyle
# Serve over HTTP for the service worker to register correctly:
python3 -m http.server 8000
# Then open http://localhost:8000 in a browser

No build step. No dependencies. Edit index.html, engine.js, sw.js directly.

The Chrome extension lives in a separate folder structure (not in this repo - the extension is packaged from a parallel working tree). The shared engine.js is kept byte-identical between the web and extension copies.

Contributing

Issues and pull requests welcome. For larger changes please open an issue first to discuss.

Internals: see docs/internal/architecture.md for the full architecture reference — engine internals, the STYLES model, extension architecture, and gotchas.

When adding a new Unicode style:

1. Add the style definition to engine.js in the STYLES array
2. Include key, label, compat (Discord/Twitter/Notion/Slack support), tip (tooltip explaining the style)
3. Implement the transform function fn that maps input chars to the new Unicode range
4. For styles with partial alphabet coverage, document the gap in the tip

Support

If UniStyle saved you time, a coffee on Ko-fi keeps the builds coming. The tool is free and stays free either way.

License

MIT - see LICENSE for details.

Author

Built by Adam Baker - part of Build with Baker, a small-tool maker brand for things that make the web a little less annoying.

Other tools coming. Feel free to follow along.