Lock black outline icon
Outline icon of a closed padlock with a tall shackle and a keyhole
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About the Lock black outline icon
A square padlock body carries a circular keyhole with a tapered slot below it, under a tall arched shackle that is clearly shut against the case. It stands for security, restricted access and privacy, which makes it the natural mark for login and password fields, HTTPS and secure checkout indicators, privacy settings panels, locked content in a course platform and file encryption states.
The shackle is unusually tall relative to the body, giving the icon a slender upright silhouette that reads well in a form field or address bar. Corners are lightly rounded and strokes are uniform. It pairs with its open padlock, key and shield counterparts. The keyhole is small, so pair it with a label below 20 px.
This is the black outline version of the lock icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
