Skip to content
TextArray
100% local

Subscript generator

Convert text to small subscript characters for chemical formulas, math and citations.

Input
Output
Related tools
Superscript generatornewStylish text
Small caps converternewStylish text
Full-width text generatornewStylish text
Fancy text generatorStylish text
Bubble textnewStylish text
Strikethrough textnewStylish text
Subscript generator
Type or paste text and this tool rewrites it with tiny subscript characters — the small glyphs that sit below the baseline, like the 2 in H₂O or the numbers in footnote citations. The result is plain Unicode, not formatting, so you can paste it anywhere text is accepted: a comment, a message, an email, a social media caption or a spreadsheet cell.
Unicode provides subscript forms for a limited set of characters: all ten digits work, the signs + − = ( ) work, and seventeen lowercase letters have a raised-and-shrunk form. Those letters are a, e, h, i, j, k, l, m, n, o, p, r, s, t, u, v, and x — they cover many common uses like chemical formulas (H₂O, CO₂, Ca₃PO₄), mathematical subscripts and variable names like x₀ or aₙ. Uppercase letters and most other characters pass through unchanged, so you can mix plain text with subscript freely.
Typical uses are chemistry and chemical notation, mathematics and variable subscripts, element and atomic numbers, footnote references and technical writing. The character count shown under the output helps you see how the conversion worked.
Everything runs locally in your browser. Nothing you type is sent anywhere, so it is safe for private notes, drafts or client work. The subscript text survives copy and paste and renders correctly on every platform that supports Unicode.
FAQ
Which characters can be converted to subscript?
All digits 0–9, the signs + − = ( ), and these seventeen lowercase letters: a, e, h, i, j, k, l, m, n, o, p, r, s, t, u, v, x. Other characters pass through unchanged, so you can mix subscript and regular text.
Why are only some letters supported?
Unicode only defines subscript codepoints for a limited set of characters. There is no subscript form for most consonants (like b, c, d, f, g) or any uppercase letter, so those stay normal size.
Can I paste the result into documents and chats?
Yes. The output is genuine Unicode text, so it works in email, messaging apps, social media comments, documents, spreadsheets and anywhere else that accepts plain text.
What is subscript useful for?
Chemical formulas like H₂O and CO₂, mathematical notation like xₙ or aᵢ, element numbers and atomic subscripts, footnote citations, and anywhere you need small text positioned below the baseline.
Is my text uploaded anywhere?
No. The conversion happens entirely in your browser and your text never leaves your device.