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Liveweave is a browser-based workspace for HTML, CSS, and JavaScript with a live preview and an AI coding assistant. It also offers a Python playground, an SVG graphics editor, and a color explorer. The site hosts a showcase of user-created experiments, such as templates and a 3D bowling game.
HTML-CSS-JS.com offers a free online HTML, CSS and JavaScript editor with instant preview. The site provides a collection of online tools related to HTML, CSS and JS, which are described as the client-side parts of websites.
HTML Reference is a free guide to HTML elements and attributes. The site organizes elements into collections including base elements, forms, lists, semantic elements and tables, and marks some entries as experimental. Each element entry lists attributes with meta, self-closing, inline and block annotations.
ResponsiveTestTool is a free web tool for previewing any website across mobile, tablet, desktop and TV screen sizes. Users paste a URL to see how the site renders on different devices without signing up.
Selenium is an umbrella project of tools and libraries for automating web browsers. It provides extensions to emulate user interaction and infrastructure for W3C WebDriver implementations, letting developers write interchangeable code for major browsers. It is primarily used for automating web applications for testing.
Mockend creates fake REST and GraphQL APIs from a mockend.yml file in a GitHub repository. It generates data with random generators and supports model relations. Writes are not persisted. The documented uses include working without a completed backend and building demos or prototypes. Pricing is per account, with Pro at $29 per month and Business at $99 per month after a 14-day free trial.
