Free Online Subscript Generator

Convert your text to subscript characters (H2O, CO2, x1) using Unicode. Perfect ...

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H₂O CO₂ ₓ₁ ₓ₂
ᴴ²ᴼ Cᴼ² ˣ¹ ˣ²

Quick Examples (click to use)

Numbers (All Supported)

0
₀
1
₁
2
₂
3
₃
4
₄
5
₅
6
₆
7
₇
8
₈
9
₉

Letters (Partial Support)

a
ₐ
e
ₑ
h
ₕ
i
ᵢ
j
ⱼ
k
ₖ
l
ₗ
m
ₘ
n
ₙ
o
ₒ
p
ₚ
r
ᵣ
s
ₛ
t
ₜ
u
ᵤ
v
ᵥ
x
ₓ

Common Uses

H₂O
Water formula
CO₂
Carbon dioxide
x₁
Math index
log₁₀
Logarithm base
SSL Secured
256-bit Encryption
Cloud Processing
Mobile Friendly

Subscript Generator Features

Full Number Support - All digits 0-9 are supported with proper subscript Unicode characters
Letter Support - 17 lowercase letters supported: a, e, h, i, j, k, l, m, n, o, p, r, s, t, u, v, x
Math Operators - Subscript versions of +, -, =, (, and ) for complete expressions
Bonus Superscript - Free superscript conversion alongside subscript output
Quick Examples - Click predefined examples like H2O, CO2, and math expressions
Browser-Based - 100% client-side processing, no data sent to servers

Why Use Free Online Subscript Generator?

Chemical Formulas

Instantly create proper chemical formulas like H2O, CO2, and H2SO4 with subscript numbers.

Math Notation

Write mathematical indices, sequences, and logarithm bases with proper subscript notation.

Bonus Superscript

Get a free superscript version of your text alongside the subscript conversion.

100% Private

All conversion happens in your browser. Your text is never sent to any server.

Real-Time Conversion

Text converts to subscript instantly as you type. No delays or button clicks needed.

Works Everywhere

Unicode subscript works on social media, messaging apps, documents, and websites.

Popular Use Cases for Subscript

Chemistry

Write chemical formulas like H2O, CO2, H2SO4, and NaCl with proper subscript notation.

Mathematics

Create variable indices (x1, x2, xn), sequence notation (a0 + a1), and logarithm bases.

Academic Writing

Add proper scientific notation to research papers, homework, and educational content.

Social Media

Share chemical formulas and math notation on Twitter, Instagram, and other platforms.

How It Works

1

Type Your Formula or Text

Enter text like "H2O" or "CO2" in the input box. Numbers and supported letters will be converted to subscript automatically.

2

See Instant Conversion

Your text is converted to subscript Unicode characters in real-time as you type. No waiting or button clicks needed!

3

Copy and Use Anywhere

Click Copy and paste your subscript text into social media, documents, messages, or anywhere Unicode is supported!

Tips & Information

Chemistry Formulas

Type the full formula normally (like H2SO4) and the numbers will automatically convert to subscript.

Quick Examples

Use the quick example buttons to try common formulas and see how they look in subscript.

Limited Letter Support

Only 17 lowercase letters have subscript versions in Unicode. Characters without subscript versions remain unchanged.

Frequently Asked Questions

Subscript text appears smaller and positioned below the baseline of normal text. It's commonly used for chemical formulas (H₂O, CO₂), mathematical indices (x₁, aₙ), and footnote markers. This tool uses Unicode subscript characters.
Unicode subscript text works on most platforms including social media (Twitter, Instagram, Facebook), messaging apps, emails, documents, and websites. It's perfect for scientific notation, chemical formulas, and mathematical expressions.
Unicode only has subscript versions for a limited set of characters. Mainly numbers (0-9) and some lowercase letters (a, e, h, i, j, k, l, m, n, o, p, r, s, t, u, v, x) are supported. Missing characters stay as originals.
Subscript appears below the text baseline (like H₂O), while superscript appears above it (like x²). Subscript is typically used for chemical formulas and indices, while superscript is used for exponents and ordinals.
Yes, completely free with no limits. All conversion happens in your browser - your text is never sent to any server. Use it as much as you like!

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