No Lock Sign black outline icon
Closed padlock behind a circle with a diagonal slash, meaning no lock
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About the No Lock Sign black outline icon
A closed padlock with a rounded shackle and a wide rectangular body sits behind a prohibition sign: a large circle with a diagonal bar running across it from upper left to lower right. Together they signal no lock, unsecured content, disabled protection or a blocked access rule. Use it for unencrypted connection warnings, disabled password fields, permission screens, device security dashboards, and IT policy slides.
The padlock is drawn low and wide so the slash cuts cleanly across its body without hiding the shackle, and the outer circle gives the whole mark a standard signage silhouette. It pairs naturally with the plain padlock, unlocked padlock and shield icons in the library. At small sizes drop the interior detail and keep the slash bold so the negation stays obvious.
This is the black outline version of the no lock sign 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.
