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12 free web validation tools in one place. Validate HTML, CSS, JSON, XML, check meta tags, Open Graph, accessibility and more. Get a quality score from 0 to 100 instantly. No signup, no limits. | CLI that replaces Ahrefs, Surfer, WordPress, Yoast, and Grammarly. 91 quality checks. Your AI agent runs it; you just set it up once. |
HTML Validator, HTML5 Validator, CSS Validator, JSON Validator, XML Validator | SEO automation |
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It is a generic test automation framework for acceptance testing and acceptance test-driven development. It has easy-to-use tabular test data syntax and it utilizes the keyword-driven testing approach. Its testing capabilities can be extended by test libraries implemented either with Python or Java, and users can create new higher-level keywords from existing ones using the same syntax that is used for creating test cases.

Combines API test-automation, mocks and performance-testing into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers. Besides powerful JSON & XML assertions, you can run tests in parallel for speed - which is critical for HTTP API testing.

Sanity is a headless, real-time CMS where the editor is an open source React-based construction kit and the backend is a graph-oriented cloud datastore with a globally distributed CDN.

With Contentful, you can bring your content anywhere using our APIs, completely customize your content structure all while using your preferred programming languages and frameworks.

Cucumber is a tool that supports Behaviour-Driven Development (BDD) - a software development process that aims to enhance software quality and reduce maintenance costs.

All your Apps have text and your developers don't want to manage it. Create and manage your text or assets with powerful editing tools and access it from anywhere with a GraphQL or REST API.

It is a pure node.js end-to-end solution for testing web apps. It takes care of all the stages: starting browsers, running tests, gathering test results and generating reports.

Prismic is a Content Management System, a tool for editing online content, also known as a headless CMS, an API CMS, a content platform, a disruptive content-as-a-service digital experience.

It is a testing and specification framework for Java and Groovy applications. What makes it stand out from the crowd is its beautiful and highly expressive specification language. It is compatible with most IDEs, build tools, and continuous integration servers.

An API-driven CMS without forcing you to make compromises in how you implement your site. The CMS for developers. Manage content like collections, regions, forms and galleries which you can reuse anywhere on your website.