Picto thématique

Rule n° 226 - The character encoding is UTF-8.

UTF-8 encoding is universal character par excellence. It will display a considerable amount of characters. By using it systematically, you will avoid many problems.

#Structure and code #Development


  • Use an international character set.
  • Prevent display faults.
  • Simplify content manipulation by users and developers.


Configure the server and databases to use UTF-8.

Choose tools (development software, frameworks, CMS, content production tools) compatible with UTF-8.


This verification is carried out in three stages. For each page checked:

  • Check the character set given by the HTTP content-type header sent by the server, using a dedicated tool.
  • Check, if necessary, for compliance of this meta element header http-equiv="Content-Type" in the HTML code of the pages.
  • Check that the content of the pages is encoded in UTF-8 (with no unexpected or erroneous characters), for example by submitting the page for HTML validation with the W3C validator (validator.w3.org).

The W3C Internationalization Checker tool (validator.w3.org/i18n-checker/) combines these three steps.

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Business application and benefits

The rules should be applied to your projects from the design phase through to post-implementation , and they should be understood by all professionals with web and customer experience (CX) responsibilities: from strategy to operations, marketers to project managers, and editorial to technical staff. The benefits of using this ruleset are numerous, including improving customer satisfaction, web performance, and e-commerce, and expanding your client base, while also decreasing your errors and costs.

Multidisciplinary verticles - accessiiblity, SEO, e-commerce, ecodesign etc..- starting from the foundational Opquast base.

The objective of these rules and the Opquast community mission is ‘making the web better’ for your customers and for everyone! Opquast rules cover the key major areas of risk that can negatively affect website users such as privacy, ecodesign, accessibility and security.

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