Lost Pixel is an open-source visual regression testing tool that integrates with GitHub to automate the detection of visual bugs in UI components. It enables developers to quickly set up tests using existing frameworks like Storybook and Playwright, ensuring consistent user interfaces before deployment.
Funding
Funding not disclosed
Founders
Product
Problem
Frontend teams need to ensure UI consistency across deployments, but manual visual inspection is time-consuming and prone to human error. Existing visual regression testing tools can be expensive and lack flexibility in integrating with existing development workflows.
Solution
Lost Pixel is an open-source visual regression testing platform that automates the detection of UI bugs directly within GitHub. By integrating with tools like Storybook and Playwright, Lost Pixel allows developers to define visual tests using their existing component libraries and end-to-end tests. The platform captures screenshots, compares them against baselines, and flags visual differences as part of the standard GitHub pull request workflow. This enables teams to catch visual regressions early, ensuring consistent user interfaces and reducing the risk of deploying broken UI.
Target Audience
Lost Pixel targets frontend developers, QA engineers, and design system teams who want to automate visual regression testing and ensure UI consistency across their web applications.
Features
- GitHub integration with automatic status checks on pull requests
- Support for Storybook, Next.js, and Playwright for visual test composition
- UI platform for reviewing, approving, and rejecting visual changes
- Element masking to ignore specific parts of the UI during comparisons
- Ability to execute custom browser code to adjust the page before taking screenshots
- Configurable thresholds for fine-grained control over visual difference detection
- Parallel test execution for faster feedback
- Support for multiple browsers and breakpoints