Why are some letters missing from the converter?

Unicode defines subscript equivalents for all ten digits and a limited set of lowercase letters (a, e, i, o, u, x, h, k, l, m, n, p, s, t). Letters not in the standard Unicode subscript range are passed through unchanged.

Are these real Unicode characters?

Yes. Every converted character is a genuine Unicode code point — not a font trick or HTML tag. They work in any app that supports Unicode text, including word processors, browsers, and messaging apps.

How is this different from using HTML subscript tags?

HTML tags only work in web pages and require markup. Unicode subscript characters are plain text and work everywhere: SMS, social media, spreadsheets, and code comments.

Can I use these in chemical formulas?

Yes. The subscript digits (₀–₉) are the most common characters used for chemical formulas such as H₂O, CO₂, and C₆H₁₂O₆. They paste directly into any Unicode-capable application.

What do the HTML entity columns show?

Where a numeric HTML entity is commonly used, it is listed. For all subscript characters you can use the form &#xXXXX; with the code point shown in the table.

Subscript Symbols

Type text to convert it to Unicode subscript characters in real time, or browse the full subscript symbol grid and click to copy.

Text to Subscript Converter

Input Text

Supported: 0–9, a e h i k l m n o p s t u x (lowercase), + - = ( )

Subscript Output

All Subscript Symbols

Click any card to copy

Reference Table

Original	Subscript	Unicode	HTML Entity	Name

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Summary

This tool offers two features: a real-time text converter that transforms normal digits and letters into their Unicode subscript equivalents, and a clickable symbol grid showing every available subscript character. Subscript characters are widely used in chemical formulas (H₂O, CO₂), mathematical notation, and plain-text environments where HTML tags are unavailable. Each card in the grid can be clicked to copy the character instantly.

How it works

Type or paste text in the converter input field.
The subscript output updates in real time as you type.
Click "Copy Result" to copy the converted subscript text.
Scroll down to the symbol grid to browse all available subscript characters.
Click any symbol card in the grid to copy that character.
Use the reference table to look up Unicode code points and HTML entities.

Use cases

Write chemical formulas such as H₂O and CO₂ in plain-text editors.
Format mathematical subscript variables like x₁, x₂ in documents.
Add subscript notation in social media posts or messaging apps.
Insert subscript characters where rich-text formatting is unavailable.
Find the correct Unicode code point for subscript characters when coding.
Copy HTML entities for subscript symbols in web development.
Annotate footnotes and bibliographic references in plain text.
Format ion charges and isotope numbers in science writing.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu