How do you display emojis in HTML?

Displaying Emojis in HTML

Emojis can be displayed in HTML in several ways, either by using Unicode characters, HTML entities, or images.

Key Methods to Display Emojis

1
Use Unicode characters directly in the HTML. Modern browsers support most emoji characters. Example: 😃, ❤️, 🌟.
2
Use numeric character references with HTML entities. For example, 😀 renders 😃, ❤ renders ❤️.
3
Use emoji images via <img> tags, linking to emoji icons hosted locally or on a CDN.
4
CSS and JavaScript libraries can also be used to insert or style emojis dynamically.

Example Usage

In short: You can display emojis in HTML directly as Unicode characters, via numeric or named HTML entities, or by using images. Modern browsers render most emojis correctly without extra setup.

Difficulty: 6/10

Topics: Character Encoding, Web Accessibility, Cross-Platform Rendering

Scenario Questions

0-2 years experience

1
We have a landing page where we want to add a wave emoji next to 'Hello'. If you just paste the emoji directly into the HTML file, what meta tag do we need to ensure it doesn't render as gibberish on the user's screen?
2
A screen reader user visits our site and encounters a decorative emoji. How would you mark up that emoji in HTML so it's either read with a helpful description or skipped entirely by assistive technologies?

2-5 years experience

1
We're building a comment section. Users are pasting emojis, but on some older Windows machines, they are rendering as black-and-white outlines or empty boxes, while they look fine on macOS. How would you debug this, and what are our options to ensure a consistent visual experience?
2
We have a text input where users can type emojis. When we save this to our database and render it back on the page, some complex emojis (like a family emoji or a person with a specific skin tone) are breaking into multiple separate emojis. What's happening here and how do we fix it?

5-8 years experience

1
We are designing a rich-text editor for a collaborative document tool. We need to support custom brand emojis alongside native system emojis. What are the performance, accessibility, and rendering tradeoffs of using an SVG sprite sheet versus a custom icon font versus native Unicode characters?
2
We have a character-limit counter on a text area (e.g., max 280 characters). If a user inputs complex emojis with zero-width joiners (ZWJ) and skin tone modifiers, a single visible emoji might register as 7 or 8 characters. How would you handle this discrepancy in both the frontend UI and the backend validation?

8+ years experience

1
Imagine we are migrating a legacy enterprise chat application to support modern emoji reactions and custom emojis globally. Walk me through the architectural considerations, from database encoding migrations (like moving to utf8mb4) to CDN asset delivery strategies and maintaining cross-platform rendering consistency across web, desktop, and mobile clients.
2
Our design system team wants to standardize how we handle iconography and emojis across 50+ independent frontend micro-apps. How would you design a unified emoji/icon strategy that balances bundle size, performance, accessibility compliance (WCAG), and localizability?

Follow-up Questions

❓How does the browser determine which font to use when rendering a native emoji?
❓What happens to string length calculations in JavaScript when a user inputs an emoji with a skin tone modifier?
❓How would you configure a MySQL database to safely store emoji characters?