A community-driven website quality score
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Pioneering easy #opensource #webstandards for a better, safer, more accessible internet, with our all-in-1 web security, performance, mobile & SEO test suite. media 3

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Passmarked is THE tool I've been looking for to check the quality of websites (mine & clients'). The open source list of tests makes it incredibly useful and flexible for integrating into the development workflow. It's only just been launched but there's already a tremendous amount of coverage that will only get better as more people contribute.