Here is the thing nobody tells you before you open LinkedIn's post box and hunt for a bold button: there isn't one. The same is true on Instagram captions, X, and Facebook. Those boxes are plain text. So when you see a post with bold intros or italic asides, the author didn't format it — they pasted in characters that only look formatted. A small industry of free web tools exists to generate those characters, and this is an honest map of the good ones.
There are two different worlds, and conflating them wastes your time.
The first world is plain-text platforms: LinkedIn, Instagram, X, Facebook. No formatting toolbar, no markdown. The only way to get visible bold or italics is to swap your letters for Unicode look-alikes — characters from the math-alphabet blocks that resemble styled letters. That swap is what every "text formatter" below does.
The second world is native-markdown platforms: WhatsApp, Discord, Slack, Telegram. These read real syntax — though it varies by app (WhatsApp and Slack use *bold* and _italic_; Discord uses **bold** and *italic*). There you should type the markdown directly and skip generators entirely. Using Unicode tricks there is worse, not better.
This post is about the first world, because that's where people get stuck.
When you type "Hello" into one of these tools and pick "bold," it does not bold anything. It replaces each letter with a different Unicode code point that happens to be drawn in a bold style — your normal "H" becomes a separate "math bold capital H" character. You copy the result and paste it anywhere that accepts Unicode, which is almost everywhere.
That's clever, and it's also the source of every caveat:
- Screen readers frequently skip or mangle these characters, because to assistive tech they aren't the letter "H" — they're an obscure math symbol. A "bold" headline can read as silence or gibberish.
- Search and platform algorithms may not register styled characters as the real word, so a hashtag or keyword in fancy font can become invisible.
- Some apps render them inconsistently across devices, and a few strip them entirely.
The practical rule: style for emphasis and personality, but keep anything load-bearing — links, dates, prices, @handles, hashtags — in normal text. Our accessibility guide goes deeper on the screen-reader trade-offs.
The honest comparison
All five run in a browser. None is an app, extension, or download — if a roundup tells you to "install" one, it's wrong.
| Tool | Bold / italic | Fancy fonts | Line breaks | Char counting | Platform focus |
|---|
| BoldlyType | Yes | Yes | Yes | Yes | Per-platform (LinkedIn, IG, X) |
| YayText | Yes | Many | No | No | Generic, lots of styles |
| LingoJam | Limited | Huge variety | No | No | Novelty fonts |
| Cool Symbol | Partial | Symbols-first | No | No | Emoji/symbols |
| FancyText | Yes | Many | No | No | Generic font gallery |
The split is simple. LingoJam and Cool Symbol lean toward novelty: dozens of decorative alphabets and symbol pickers, great for a one-off aesthetic caption, thin on practical extras. YayText and FancyText are solid generic galleries — pick a style, copy, done — but they don't help with line breaks (which LinkedIn and Instagram silently collapse) or counting against character limits. BoldlyType (full disclosure: this is our site) is organized by platform and bundles the boring-but-useful tools — line-break insertion, a character counter, per-network presets — into the same flow.
Use what fits the job. For a quirky bio, a novelty generator is perfect. For a LinkedIn post you'll publish weekly, the practical extras save more time.
Ignore the branding and check these:
- Range. Does it do more than bold? You'll eventually want italic, a fancy font, and structure. A bold-only tool runs out fast.
- Platform fit. Does it handle the platform's quirks — line breaks that collapse, character limits that cut you off mid-sentence?
- Copy reliability. One clean copy button beats fiddly text selection, especially on mobile.
- Honesty about caveats. A tool that warns you about screen readers and SEO is one that understands what it's actually doing.
- No install. It should run in the browser. Anything asking you to download something for plain Unicode output is overkill.
- Writing a LinkedIn post with bold hooks and clean spacing — a per-platform formatter handles the line-break collapse. See the LinkedIn text formatter.
- Styling an Instagram caption or bio where line breaks vanish on save — use the Instagram text formatter.
- Just need bold, fast for any plain-text box — a focused bold text generator is the quickest path.
- Browsing every available style before you commit — an all-styles text generator or a font gallery lets you compare.
- Curious which fonts exist and how they render — the fonts overview explains the Unicode families behind the look.
The honest summary: these tools are interchangeable in the one thing they all do — swapping letters for Unicode look-alikes. They differ in range, platform polish, and whether they tell you the truth about the accessibility cost. Pick the one that covers the styles you'll actually use, fits the network you post to, and doesn't pretend Unicode is real formatting. It isn't — but used with restraint, it still makes a flat post easier to read.
