Oxygen O2 Bubbles black filled icon
Outline large circle with a subscript 2 forming O2, with three small bubbles above
About the Oxygen O2 Bubbles black filled icon
One large circle carries a subscript 2 to spell the O2 formula, with three smaller bubbles rising above it. The mark communicates oxygen, breathable air and gas supply without showing a tank or mask. Use it on medical and respiratory device pages, air purifier product sheets, chemistry teaching slides, diving and fitness apps, and air quality dashboards.
The big circle anchors the composition while the three loose bubbles vary in size to suggest upward motion. Stroke weight matches the numeral, so neither element dominates. It pairs with lung, air filter and molecule icons. Keep it at 32 px or larger so the subscript stays legible.
This is the solid black filled version of the oxygen o2 bubbles icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
Download it free as a scalable SVG vector or transparent-background PNG in seven sizes (16 to 512px), copy the SVG code straight into your project, or open it in the free online editor to change colors, apply gold, silver, neon and gradient styles, animate it, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
