4,000 Free Streamline Core Icons — Best for UI Design

Over 4,000 free icon assets from Streamline’s Core Line icon set. The icons are grouped into sections like Interface Essentials, Arrows, and Shapes. An image link and name represent each icon. Clicking the image downloads a free PNG or SVG file of the icon. Core Line icons are designed for maximum legibility at a tiny 14px grid size. Users are free to use the icons with attribution to Streamline.