Combining Square Below

Combining Square Below is a combining diacritical mark, meaning it doesn't stand alone — it attaches to whichever character comes immediately before it in the text, visually merging to form an accented letter or annotated symbol.

Unicode block: Combining Diacritical Marks (U+0300–U+036F). Combining marks are "zero-width" characters that attach to the previous letter to add an accent, rather than existing as their own visible glyph — this is how Unicode builds accented letters that don't have a precomposed code point.

At Unicode code point U+033B (decimal 827), Combining Square Below is the 60th of 112 characters cataloged in this category on How To Type Any Symbol. In terms of typing methods, like most characters outside the 0–255 legacy codepage range, it has no dedicated Alt-code or single-key shortcut on Windows or Mac, so copy-paste is the standard, universal method for typing it. Regardless of platform, clicking the copy button above places the exact character on your clipboard, ready to paste into any application that accepts Unicode text.

💡 Good to know: This is the technique behind so-called "zalgo text" (glitchy, stacked-accent text) seen on social media — stacking many combining marks on one letter.