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CSS HTML Validator (previously named CSE HTML Validator) is an HTML editor and CSS editor for Microsoft Windows (and Linux and other Unix-like operating systems when used with Wine) that helps web developers create syntactically correct and accessible HTML/HTML5, XHTML, and CSS documents by locating errors, potential problems like browser compatibility issues, and common mistakes.
The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
Lighthouse audits performance, accessibility, and search engine optimization factors of web pages, [1] [2] [3] this is the major difference from Google PageSpeed, Lighthouse provides more detail information. It also includes the ability to test progressive web applications for compliance with standards and
W3Schools is a freemium educational website for learning coding online. [1] [2] Initially released in 1998, it derives its name from the World Wide Web but is not affiliated with the W3 Consortium. [3] [4] [unreliable source] W3Schools offers courses covering many aspects of web development. [5] W3Schools also publishes free HTML templates.
Link Sleuth runs on Microsoft Windows. Link verification is performed on links which appear in <a> tags, as well as images, frames, plug-ins, backgrounds, local image maps, style sheets, scripts, and Java applets. The program follows links to other pages, and checks the links on those pages also, so it is possible to check an entire site for ...
Therefore, when creating an external link, for optimal use of Linksearch, use a canonical form for the URL. In particular, if after following a link the address bar shows a modified URL, change the URL in the link to that. The list is alphabetic in the URL. Note that an underscore, unlike a blank space, is alphabetically positioned between "Z ...
When visiting a web page, the referrer or referring page is the URL of the previous web page from which a link was followed. More generally, a referrer is the URL of a previous item which led to this request. For example, the referrer for an image is generally the HTML page on which it is to be displayed.
Engine Status [a] Steward License Embedded in WebKit: Active Apple: GNU LGPL, BSD-style: Safari browser, plus all browsers for iOS; [3] GNOME Web, Konqueror, Orion: Blink: Active Google: GNU LGPL, BSD-style: Google Chrome and all other Chromium-based browsers including Microsoft Edge, Brave, Vivaldi, Huawei Browser, Samsung Browser, and Opera ...