DNA black filled icon
Outline DNA double helix strand with four horizontal base-pair rungs between twisting strands
About the DNA black filled icon
Two curved strands twist around a shared vertical axis and cross at three points, with four straight rungs drawn as base-pair connectors inside the widest loops. The upright ladder shape reads instantly as genetics, heredity, molecular biology and DNA testing. Use it in lab and biotech websites, genealogy or ancestry apps, medical research dashboards, health-science presentations and pharmaceutical packaging where a scientific mark is needed.
The helix is taller than it is wide, with even spacing between crossings so the rungs stay legible when scaled down. Line weight matches other science icons such as microscope, test tube and molecule, making it easy to build a matching set. At 16-20 px, drop to two rungs or use the filled style to avoid the strands merging.
This is the solid black filled version of the dna 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.
