Subscript Generator
A subscript generator converts plain letters and digits into small lowered Unicode characters — the style used in chemical formulas like H₂O and mathematical notation like xₙ. It works by swapping each supported character for its matching subscript code point; Unicode's subscript letter set is small, so this tool passes unsupported characters through unchanged instead of guessing at a substitute.
Type your text into the box above and this subscript generator lowers every supported character as you go — instantly, in your browser, with nothing uploaded or saved. There is no account to create and no limit on how many times you run text through this subscript generator.
Subscript coverage in Unicode is narrower than superscript's, which shapes what a subscript generator can reliably produce. All ten digits have a subscript form, and a handful of lowercase letters do too — enough for chemical formulas and simple math variables — but there are no subscript uppercase characters anywhere in the standard, and most lowercase characters were never given one either. This subscript generator is honest about that gap: unsupported characters stay exactly as typed rather than being dropped or swapped for something that does not match.
If you need the opposite effect, switch to the raised mode with the same style selector and this subscript generator turns into a raising tool instead, without losing what you already typed.
What subscript text is for
Subscript is the small, lowered style you see in chemical formulas (H₂O, CO₂) and mathematical notation (xₙ, aᵢ), where a digit or character sits slightly below the baseline of the one before it.
- Chemistry formulas typed in chat, notes, or plain-text documents.
- Indexed math variables (x₁, x₂, xₙ) outside a formula editor.
- Footnote or citation markers that sit below the line instead of above it.
Because a subscript generator outputs real Unicode characters, the lowered text pastes correctly anywhere plain text is accepted — no equation editor or special font required, and no separate step for math versus chemistry notation.
Why subscript coverage is limited — on purpose
Unlike the raised style, Unicode never built out a full subscript alphabet, so a subscript generator built on real code points is inherently more limited than one that could invent glyphs. Only a subset of characters have a subscript form, and there are zero subscript capital characters in the entire standard.
- All digits 0-9 convert to subscript.
- About sixteen lowercase characters convert (enough for common formulas and math notation).
- Characters like b, c, d, f, g, and every capital character have no subscript equivalent and stay unchanged.
This subscript generator treats that gap as a feature, not a bug: it never substitutes a mismatched lookalike character, so the parts of your text a subscript generator does convert stay accurate to formula and notation standards.
Subscript compared to the raised style, side by side
The lowered style sits below the line; the raised style sits above it — a water molecule is written with the lowered form (H₂O), while an exponent uses the raised one (x²). The same tool covers both — flip the style selector next to the input box any time without retyping your text, so you can compare the two styles on the same line before you copy either one.
Frequently Asked Questions
Updated August 2026How do I make subscript text?
Type your text into the box above. This subscript generator converts each supported digit or character into its small, lowered Unicode form as you type — copy the result with the button below the tool.
Why do some characters not convert to subscript?
Unicode only defines subscript versions for a small set of lowercase characters and no capital characters at all. This subscript generator leaves unsupported characters exactly as typed rather than replacing them with an unrelated one.
Can I type a chemistry formula like H2O?
Yes — type H2O into this subscript generator and the digit converts automatically, producing H₂O. A subscript generator handles digits in common formula positions like this reliably, since digits have full subscript coverage.
Does this subscript generator also make raised text?
Yes. Switch the style selector next to the input box and the same tool raises your text instead of lowering it, using the text you already typed — no separate page or retyping needed.