Subscript Generator
Convert text and numbers to subscript online. Copy and paste ₛᵤᵦₛcᵣᵢₚₜ characters for chemical formulas like H₂O and CO₂.
Example — type your own text above to convert it.
A subscript generator lowers characters below the baseline at a smaller size, producing text such as H₂O and CO₂. Unicode assigned only ten digits and seventeen letters a subscript form, so most letters pass through unchanged.
Examples
| Input | Output |
|---|---|
| H2O | H₂O |
| CO2 | CO₂ |
When to use the Subscript Generator
Subscripts exist in Unicode almost entirely to serve chemistry and mathematics. The digits are complete and universally supported, which is why H₂O, CO₂, and CH₄ paste correctly into any field — a chat message, a filename, a spreadsheet header.
The letters are a much thinner set. Only seventeen exist: a, e, h, i, j, k, l, m, n, o, p, r, s, t, u, v, and x. There is no subscript b, c, d, f, g, q, w, y, or z. This tool leaves the missing ones as ordinary letters rather than substituting an unrelated lookalike, which means a word like "subscript" comes out partly lowered and partly not.
For chemical formulas, that limitation does not matter — the digits are what you need, and they all work.
Frequently asked questions
Why are most letters not converted to subscript?
Unicode only ever assigned subscript forms to seventeen letters, mostly for mathematical notation. The rest do not exist, so they pass through unchanged.
Can I write chemical formulas like H2O with this?
Yes. All ten subscript digits exist and are widely supported, so H₂O, CO₂, and CH₄ render correctly nearly everywhere.
Do subscript numbers count as numbers?
No. A subscript digit is a separate character from the ordinary digit, so a spreadsheet treats it as text and will not calculate with it.