Lock black outline icon
Closed padlock with a round keyhole, drawn inside a circle outline
About the Lock black outline icon
A closed padlock sits inside a thin circular badge: a rounded shackle arches above a squared body whose lower edge curves, and a classic keyhole — a small circle over a tapering slot — is centered on the face. It signals protection, restricted access and confidentiality. Use it on login and password fields, privacy settings pages, HTTPS and encryption notices, locked content in apps, and security service presentations.
The shackle, body and keyhole share consistent stroke weight, and the enclosing ring makes the mark work as a round button or avatar-sized badge. It pairs naturally with unlock, key, shield and fingerprint icons in the library. Keep it at 24 px or above so the keyhole slot does not fill in.
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.
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.
