The subscript converter turns ordinary text into small, lowered Unicode characters that sit below the baseline — the style used for the 2 in H₂O. Because these are real Unicode code points rather than a font setting, you can paste the result into chemical formulas, notes, and bios on platforms that lack rich-text formatting.
How it works
Each character is looked up in a table of Unicode subscript code points. All digits convert cleanly: 0→₀ (U+2080), 1→₁ (U+2081), 2→₂, through 9→₉. Unicode also defines subscript forms for a limited set of lowercase letters, for example a→ₐ (U+2090), e→ₑ, o→ₒ, and x→ₓ. Uppercase letters are folded to lowercase before lookup. Any character without a subscript equivalent passes through unchanged, so unsupported letters and punctuation stay readable.
Example
The chemical formula H2O becomes H₂O: the digit 2 maps to the subscript ₂ while H and O have no subscript letter form and remain as typed. CO2 becomes CO₂. To raise characters above the baseline instead, use the superscript converter.