Emoji Rendering Test

In short An emoji that appears as an empty box is missing from your device's font, not broken on the page. Emoji are added to Unicode every year and fonts ship with the operating system, so a phone or computer that has not been updated recently simply has no picture for the newest ones — and a website cannot fix that, because the glyph is supplied by the platform rather than the page. The only real workaround is to avoid recent additions in anything that must render everywhere, or to use images instead of characters. The more surprising failure is an emoji splitting into several pictures. Many modern emoji are SEQUENCES: a family is several people joined by zero-width joiners, a flag is two regional indicator letters, and a skin-tone variant is a base emoji plus a modifier. When a device does not know the combination it falls back to drawing the parts, which is why you sometimes see a man, a woman and a child side by side instead of one family. Detection here compares rendered glyph widths, which is reliable in normal conditions but can be fooled by unusual font configurations, so treat a surprising result as worth a second look.