I needed to combine before/after screenshots for documentation and couldn't find a simple tool that just works. So I built this browser-based tool.<p>Try it: <a href="https://yani-.github.io/beforeafter/" rel="nofollow">https://yani-.github.io/beforeafter/</a><p>Source: <a href="https://github.com/yani-/beforeafter">https://github.com/yani-/beforeafter</a>