Lock

The lock icon represents security, authentication, and access control in digital interfaces. Featuring a classic padlock design, this symbol has become the universal indicator for secure connections, password protection, and privacy settings across all platforms.

In modern applications like LastPass or 1Password, you'll see this icon indicating secure credential storage and encrypted data. It appears in browsers like Chrome when showing HTTPS connections, or in mobile apps like Signal when displaying end-to-end encryption status. E-commerce platforms like Shopify prominently display lock icons during checkout to reassure customers about payment security.

From a security perspective, the lock communicates more than just restriction - it specifically indicates data protection, trust establishment, and the safeguarding of sensitive information. This visual cue helps users feel confident that their personal data and transactions are protected from unauthorized access.

Lock is one of 100 icons in Flat UI Icons, made by Designmodo, Inc. and released under MIT. It is drawn on a 88 × 99.998 grid.

Sign in (it's free), then open Get icon, Install with shadcn CLI, and pick your package manager to copy the command. It adds LockIcon to components/icons/flat-ui-lock.tsx: one file, a size prop (24 by default) and every SVG prop, with no icon package.

Copy it as React (from Get icon, or the Code section): a typed LockIcon component you paste into your project, with no package to install. Only the icons you import reach your bundle. It works in Next.js and any React app.

Open Get icon, then Copy as code, and pick Vue, Svelte, Angular, Solid or Preact; the Code section shows each one too. Every version is one self-contained component with the SVG inside, and SVG and data URL copies are there for plain HTML and CSS.

With Pro, the shadcn.io MCP server lets Claude Code, Cursor or any MCP client find the Lock icon, or any of 100 Flat UI Icons icons, and install it from a prompt.

It's multicolor, so it keeps its own colors.

Set width and height on the component, or a class like size-6. It's drawn on a 88 × 99.998 grid, so it stays sharp at any size. Customize also sets the size it exports at, its padding and rotation.

Yes. It keeps its own colors in light and dark mode, so check it against both backgrounds. The icon is a vector, so it needs no separate dark asset.

Next to a visible label it's decoration: add aria-hidden="true" so screen readers skip it. Standing alone, as in an icon button, give the button a name instead, like aria-label="Lock", so screen readers say what it does.

Yes. LockIcon passes every SVG prop to the svg element, so <LockIcon aria-hidden="true" /> works, and so do role="img" with aria-label, or a title child, when it carries meaning on its own.

Yes. Open Get icon, then Download file: SVG for code or design tools like Figma; PNG, WebP or JPEG at 512px; or an ICO favicon with 16, 32 and 48px inside. Each one uses what you set in Customize.

Yes. MIT allows commercial use; keep the license notice when you ship the icons' source files. The full terms are in the license, linked on this page.

No visible credit is required: MIT only asks that you keep the license notice if you ship the icons' source files. Icons installed with the shadcn CLI already start with a comment naming Flat UI Icons, Designmodo, Inc. and the license.

Yes. Copying and downloading it is free, and the shadcn CLI install only needs a free account.

8 other libraries draw an icon called Lock. The Other libraries section on this page shows each one, so you can compare them and open the one that fits your style.

Its tags are security, authentication, privacy, password, encryption and protected. Each tag page lists the icons that carry it from every library, which is the quickest way to find a match for Lock in another set.