Letters

Number

Streamline 3.0

Ultimate

Core

Flex

Sharp

Plump

Micro

Freehand

Streamline Material

Nova

Cyber

Streamline Vault

Logos

Pixel

Google Material

Tabler

Remix

Feather

Iconoir

Carbon

Solar

Lucide

Brand Logos

Bootstrap

Atlas

Unicons

Ionic Icons

Phosphor

MingCute

Font Awesome

Majesticons

Mynaui

Radix

Heroicons

Flagpack

Clean line icon of a rounded capital O. Used for typography, alphabet labels, and text interfaces.

Sharp line icon of a large O with a smaller superscript 2. Used for oxygen, chemistry, and science.

Rounded line icon of a large O with a smaller 2 positioned at its lower right. Used for oxygen, chemistry, and science labels.

Blood Drop Type O

Power Outlet Type O

Opera Logo

Number Zero Square

Number Zero Circle

Rounded solid icon of a large O with a smaller subscript 2. Used for oxygen, chemistry, and science labels.

O2 Fill

Sharp solid icon of a large O with a smaller 2 at lower right. Used for chemistry, formulas, and science UI.

Clean solid icon of a large O with a smaller 2 set at the lower right. Used for oxygen, chemistry, and science.

Pollution O2

Pollution O 2

Kai OS Logo

Oxygen Tank O2 1

Oxygen Tank O2 2

Pollution O2 Message

Pollution O 2 Message

The O icon shows a rounded capital letter O with a simple open center. Drawn in the line style on a 24px grid with a 1px stroke for a clear, adaptable form. Use it for typography, alphabet labels, text interfaces, and character-based navigation. It belongs to Typeface - Free set in the Streamline Vault family.

<p>[Open-source] Typeface is a collection of basic letters and numbers that can be adapted to any project or integrated with most of our icon sets. It also allows you to customize the line thickness. All Typeface icons are designed on a 14px grid with a 1px default stroke. Licensed under the Creative Commons - CC BY 4.0</p>

Typeface - Free

<p>Streamline Vault holds hidden gems: Guidance for signage, Platinum for luxury ecommerce, Block for Bauhaus design, Stickies for fun, Kameleon for flat color, Nasty for… well, you’ll see… and more.</p>

Icons with creative styles

O is a line-style Icon from Typeface - Free set.