Subscript Generator
Convert characters into Unicode subscript for formulas and notes.
Generators Runs in your browser
What is a subscript generator?
Unicode gives every digit a subscript form (₀–₉, U+2080 onward) but only a scattered set of letters, mostly ones phoneticians needed, like ₐ, ₑ, ₓ and ₙ. A subscript converter swaps in those characters where they exist and leaves the rest alone. That is enough for H₂O, CO₂ and index notation like x₁, and the result works in plain-text fields where a word processor’s subscript button means nothing.
How to use the Subscript
- 1 Key in a formula such as H2O or x1.
- 2 Digits and supported letters sink into subscript.
- 3 Grab the output with the Copy button.
- 4 Use it in notes, messages or a forum post.
What you can use it for
- Writing chemical formulas in plain text.
- Adding mathematical indices like x₁ or aₙ.
- Posting footnote-style markers in chat.
- Labelling variables in code comments.
Frequently asked questions
Which characters can become subscript?
All ten digits (₀–₉), the signs +, −, = and parentheses, and a limited letter set: a, e, o, x, h, k, l, m, n, p, s, t, plus i, r, u, v and j from the phonetic blocks. Everything else passes through unchanged.
Why won’t the letter b convert?
There is no subscript b anywhere in Unicode, and the tool refuses to fake one with a different glyph. Missing letters stay full-size so your formula remains honest and legible.
Will H₂O display correctly on phones?
Yes. The subscript digits date back to Unicode 1.1 and ship in every mainstream system font, so formulas render fine on iOS, Android and desktop chat apps alike.
Related tools
More Generators
More tools like this:
All Generators