Subscript generator
Lower formula digits without changing element names.
Your text stays in this browser. No sign-up.
Tap a word to select it
9 characters · 9 UTF-16 units
Link protection & history
Links, mentions and hashtags are protected by default. History stays in this tab, up to thirty versions. Select a part of the editor or tap a word, then apply.
Numbers and operators — insert at the selection
Unmapped Latin letters in the editor: H O C. Capitals remain ordinary.
H₂O needs a lower digit, not a lowercase H
Choose a chemical sample to select the number automatically, or type a formula and select its numeric part. Lower all digits changes ordinary 0–9 throughout the editor while keeping letters alone. This is a typography tool, not a chemistry parser: it does not validate formulas, balance reactions or distinguish a coefficient from a formula index. In 2H2O, lower only the second 2.
Indices, labels and the incomplete letter set
Subscripts can label a variable such as x₁ or a sequence such as aₙ. The digit and operator sets are complete for 0–9 and + - = ( ). The letter set here is limited to a e h i j k l m n o p r s t u v x. It draws from Subscripts and Phonetic Extensions. Uppercase letters and the missing lowercase letters remain ordinary.
That last example is only possible because m, a and x all have mapped lowered forms. Do not assume any label can be lowered equally: the editor reports unmapped Latin letters below the operator palette.
When a document’s formatting is preferable
If you control the document, its subscript formatting works with a full font rather than a patchwork character table. For plain-text messages, these characters can be useful, but supply ordinary notation when legibility or accessibility matters. Some screen readers announce each substituted character separately.
Use superscript for exponents or raised charge digits. Undo an edit here to recover the exact original formula. The small-text comparison shows why lowered text is different from small capitals.
Frequently asked questions
Can I lower only numbers in a chemical formula?
Yes. Lower all digits leaves letters unchanged. It also lowers leading coefficients, so use a selection when a number belongs on the baseline, as in 2H₂O.
Does this produce a real mathematical formula?
It produces a plain-text string of characters. It has no equation layout, formula validation, automatic numbering or chemistry interpretation.