---
title: "Lock Icon | Free Download PNG & SVG | Ultimate Duotone"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/lock--15799
canonical_url: "https://www.streamlinehq.com/icons/download/lock--15799"
summary: "Clean duotone icon of a padlock inside four corner brackets. Used for security, privacy, and access controls."
---

# Lock icon

The Lock icon shows a closed padlock with a rounded shackle and keyhole, centered inside four corner brackets. Drawn in the duotone style on a 24px grid with a 1px stroke so its color-separated fill and outline stay clear at small sizes. Use it for security settings, privacy controls, authentication screens, protected content, and access management. It belongs to Ultimate Duotone set in the Ultimate family.

## Preview

![Clean duotone icon of a padlock inside four corner brackets. Used for security, privacy, and access controls.](https://assets.streamlinehq.com/image/private/w_240,h_240,ar_1/f_auto/v1/icons/streamline-duotone/interface-essential/lock-unlock/lock-d1e0d1eeovfph8jxl7c42e.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Lock
- **Type**: Icon
- **Set**: [Ultimate Duotone](/icons/streamline-duotone.md) — Ultimate is the world’s largest icon family, designed by 8 expert designers. The Duotone style enhances visual depth by combining colored lines and filled shapes, perfect for matching brand or project colors. Key advantages: 1—Customizable colors. Apply up to four different colors to icon elements. 2— Adjustable stroke thickness. Create looks ranging from thin to bold for varied aesthetics.
- **Family**: [Ultimate](/icons/ultimate-sets.md) — The encyclopedia of icons
- **Style**: Duo, Stroke, Filled
- **Category**: Interface Essential › Lock Unlock
- **Default size**: 24px
- **Stroke width**: 1px
- **Pricing**: Pro
- **License**: [Commercial](https://home.streamlinehq.com/license-premium)
- **Author**: [Streamline](https://home.streamlinehq.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: secure, lock, locked, padlock, protection, privacy, encrypted, safety, confidential, safeguard, security, key, keyhole, lock unlock, identification, private, bracket

## Download

- [Download Lock on Streamline](https://www.streamlinehq.com/icons/download/lock--15799)

## Also available in other styles

- [Lock — Ultimate Colors](/icons/download/lock--19594.md) (Pro)
- [Lock — Ultimate Regular](/icons/download/lock--8995.md) (Pro)
- [Lock — Ultimate Bold](/icons/download/lock--7533.md) (Pro)
- [Lock — Ultimate Light](/icons/download/lock--8264.md) (Pro)

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