Lock black outline icon
Closed padlock with arched shackle and a keyhole in its rounded square body
About the Lock black outline icon
A padlock drawn straight on: a tall arched shackle rises from a rounded square body that carries a classic keyhole with a circular top and a tapered slot below. The closed shackle makes it read clearly as locked rather than open, so it works for login and password fields, HTTPS and privacy badges, protected content labels, account settings menus and security feature slides.
Proportions are generous - the body takes roughly half the height and the shackle arch matches its width - giving a stable, symmetrical silhouette. Pair it with unlock, key, shield and fingerprint icons from the same family. The keyhole is the first detail to blur, so keep the icon at 24 px or larger.
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.
