The W3C Markup Validation Service
https://validator.w3.org/
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. As an alternative you can also try our non-DTD-based validator.
Validator.nu (X) HTML5 Validator
https://html5.validator.nu/
Validator.nu (X)HTML5 Validator (Living Validator). Validator Input. Address File Upload Text Field. Show Image Report.
validator - npm
https://www.npmjs.com/package/validator
validator.js. A library of string validators and sanitizers. If no_colons is true, the validator will allow MAC addresses without the colons. Also, it allows the use of hyphens, spaces or dots e.g '01 02 03 04...
Free Online HTML Validator - FreeFormatter.com
https://www.freeformatter.com/html-validator.html
HTML Validator / Linter. Validates HTML files for compliance against the W3C standards and performs linting to assess code quality against best practices. Find missing or unbalanced HTML tags in your...
Нужна Ли Html-валидация?! / Хабр
https://habr.com/ru/post/101985/
html validator.
15 Most Popular HTML Validator Online Tools in 2021
https://www.softwaretestinghelp.com/html-validator/
HTML Validator is a tool to validate HTML web elements for any syntax or format errors. List and comparison of the Best Online HTML Validator Tools: HTML stands for Hyper Text Markup Language.
Validator - Wikipedia
https://en.wikipedia.org/wiki/Validator
A validator is a computer program used to check the validity or syntactical correctness of a fragment of code or document. The term is commonly used in the context of validating HTML, CSS, and XML documents like RSS feeds, though it can be used for any defined format or language.
validatorsvalidators 0.11.2 documentation
https://validators.readthedocs.io/
Each validator in validators is a simple function that takes the value to validate and possibly some additional key-value arguments. Each function returns True when validation succeeds and...
XML Validator is a web based validator and re-formatter for XML
https://codebeautify.org/xmlvalidator
XML Validator is easy to use the XML Validate tool. Copy, Paste, and Validate. This is also called as XML Lint tool. What can you do with XML Validator Online? It helps to validate your XML data.
Best HTML Validator Online to validate HTML data: W3C HTML...
https://jsonformatter.org/html-validator
Free HTML Validator is a web based validator and re-formatter for HTML. HTML Validator Online is easy to Validate HTML. Copy, Paste and Validate. This is also called as HTML Lint tool.
GitHub - validator/validator: Nu Html Checker - Helps you catch...
https://github.com/validator/validator
validator.github.io/validator/. MIT License. 1k stars. You can get the latest release or run docker run -it --rm -p 8888:8888 validator/validator:latest, npm install vnu-jar, brew install vnu, or pip install...
Validator, for Bootstrap 3
https://1000hz.github.io/bootstrap-validator/
Validator validator.js. Overview. This plugin adheres to the conventions set forth by Bootstrap's core jQuery plugins, so be sure to check those out to get a better understanding of the goals and design of...
XML Validator
https://www.w3schools.com/xml/xml_validator.asp
Use our XML validator to syntax-check your XML. To help you syntax-check your XML, we have created an XML validator.
CSS Validation Service
http://www.css-validator.org/
To see if your Mobile Site Validates go here: http://mobile.css-validator.org/ A CSS designed web page is most likely to rank higher on search engine rankings as CSS reduces the complexity of the content...