Type once and get every style, then paste it into a bio, username, caption or message. Every character here is checked against the Unicode database. Each one tells you where it works and where it breaks, because a name that arrives as empty boxes is worse than a plain one.
U+1D400 The Unicode codepoint the style's characters come from. Two styles can look almost identical and still be different characters with different device support. The codepoint is the only reliable way to tell which one you copied.
IGTTRB Platform support. Green renders reliably. Amber works, but breaks on some devices or in some fields. Struck through is filtered out or rejected by that platform.
IG Instagram · TT TikTok · DC Discord · WA WhatsApp · FB Facebook · X (Twitter) · RB Roblox
Or jump to every style, symbols or the bio builder.
Every style and symbol is generated from the Unicode database and checked as it is built. No unassigned characters, no near-duplicates, and no circled "1" that turns up as a "2". Each card shows its codepoint so you can look it up yourself.
Instagram rejects styled usernames. Roblox strips them from chat. Half the styles here have no digits at all. All of that is on the pages, because a tool that only tells you the good news is no help when your bio arrives broken.
Platform limits come from each platform's own documentation where it exists. Where sources disagree, the page says so rather than picking one and hoping. How we check facts.