Subscript Generator H₂O

It is a free tool that turns your normal text and numbers into small lowered characters — the kind that sit below the line, like the 2 in H₂O or the 1 in x₁. You type on the left, the lowered version appears instantly, and you copy it with one click. Because the result is made of real characters, you can paste it almost anywhere: Word, Google Docs, WhatsApp, Discord, YouTube comments and social bios.

Just type the formula the plain way — H2O, CO2 or C6H12O6 — and this subscript generator automatically lowers the numbers that belong to the formula while leaving the letters full size. So H2O becomes H₂O and C6H12O6 becomes C₆H₁₂O₆ with no settings to change. A leading number, like the 2 in "2H2O", stays full size because it is a coefficient, not part of the formula.

Wrap the part you want lowered in tildes. Type x~n~ to get xₙ, or a~i~ to get aᵢ. Everything between the tildes drops down; everything outside stays normal. This is handy for math variables and indices where the small part is a letter rather than a number.

Only some characters have a ready-made lowered version. Every digit 0–9 works, and 17 lowercase letters (a e h i j k l m n o p r s t u v x) work, but the rest — b, c, d, f, g, q, w, y, z and every capital letter — simply do not exist as lowered characters. When you type one of these, the tool leaves it as-is and tells you, instead of swapping in a look-alike that could confuse readers. A common workaround is to pair a normal letter with a lowered number, such as B₁ or Fₙ.

They lower or raise characters in opposite directions. Subscript sits below the line and is standard for chemistry formulas (H₂O, CO₂) and math indices (x₁, aₙ). Superscript sits above the line and is used for exponents and footnotes (x², E=mc², ¹). If you need raised text instead of lowered text, use a superscript generator.

Pick by where the text is going. Inside Word, Google Docs or PowerPoint, the built-in subscript button is best — it works for any character, including capitals, and stays perfectly aligned. Use the shortcut Ctrl+= (⌘+= on Mac) in Word and PowerPoint, or Ctrl+, (⌘+,) in Google Docs. But that formatting only survives inside the editor. For a plain box that has no formatting menu — a WhatsApp or Discord message, a YouTube comment, a social bio — copy the lowered characters from this tool instead.

Yes. None of them have a subscript button, but they all display lowered characters correctly on modern devices. Generate the lowered text here, copy it, and paste it straight into your message, comment or bio. A few apps that force their own font may show it slightly differently, so it is worth a quick test before you rely on it for something important.

It is completely free with no signup and no limits. Everything runs in your browser, your text is never uploaded or stored, and it works on both desktop and mobile.