2026: 2 of the Global Top 200 Websites Use Valid HTML j9t )Sep 10, 2026 223 html , metrics , quality , craft hihtml j9t )May 13, 2026 222 packages , npm , html , links , link-rot , minification , html-minifier , optimization , quality AI and HTML: Validating, Omitting Optional Code, and Minifying as Token Optimization j9t )May 12, 2026 221 ai , token-optimization , html , minimalism , minification , optimization How to Improve Your HTML Game j9t )Feb 5, 2026 220 how-tos , html , learning , career Accessible Faux-Nested Interactive Controls eri /pic )Jan 15, 2026 219 accessibility , html , nesting How Can You Tell What’s Allowed Inside Each HTML Element? rus )Dec 31, 2025 218 html The Two Most Important Tools for HTML Developers Dec 22, 2025 217 tooling , html , minification , html-minifier , htmlnano , swc What’s Wrong With This HTML, and Is It Valid? pat /mat )Dec 8, 2025 216 html , standards , web-platform HTML—the Most Difficult Programming Language in the World j9t )Oct 9, 2025 215 programming , html , professionalism Understanding the Removal of 4.1.1 Parsing in WCAG 2.2 tpg )Oct 1, 2025 214 accessibility , wcag , html 2025: 0 of the Global Top 200 Websites Use Valid HTML j9t )Sep 10, 2025 213 html , metrics , quality , craft Conformance vs. Compliance, Accessibility Standards Edition hdv )Aug 12, 2025 212 accessibility , standards , compliance , terminology , comparisons , wcag When HTML Speaks Clearly Aug 6, 2025 211 html , accessibility , semantics Why and How to Write Minimal and Valid HTML, a Link Guide j9t )Jul 24, 2025 210 html , minimalism , how-tos , guides , link-lists Google: Many Top Sites Have Invalid HTML and Still Rank mat /sea )Jun 30, 2025 209 google , html , quality , seo How Often Should We Speak About HTML Conformance? j9t )May 14, 2025 208 html , metrics Mastering HTML: The Art of Minimal and Valid Code in Professional Web Development (AI Edition) j9t )Apr 23, 2025 207 guest-posts , html , minimalism , semantics , interoperability , accessibility , standards A Review of HTML Linters Mar 17, 2025 206 overviews , html , linting , tooling , link-lists , comparisons DeepSeek and HTML j9t )Mar 7, 2025 205 ai , deepseek , html , minimalism Testing 10 JavaScript Frameworks on Their HTML Defaults j9t )Feb 12, 2025 204 frameworks , javascript , html , comparisons , link-lists HTML Conformance: A Comparison of 6.5 npm Validator Packages (With 1.5 Recommendations) j9t )Dec 17, 2024 203 html , tooling , npm , comparisons Where Has All the Valid HTML Gone j9t )Nov 21, 2024 202 html , quality 2024: 0.5% of the Global Top 200 Websites Use Valid HTML j9t )Sep 11, 2024 201 html , metrics , quality , craft Test-Driving HTML Templates xpm /mfo )May 21, 2024 200 html , templates , testing , server-side-rendering We Need to Talk More About Conformance, if We Want to Stop Fantasy HTML j9t )May 21, 2024 199 html , craft , quality Level-Setting Heading Levels aar )May 8, 2024 198 headings , semantics , accessibility , aria Upgrade Your HTML V j9t /fro )May 8, 2024 197 books , frontend-dogma , html , minimalism , craft 9 Signs Your Frontend Code Has Quality Issues That Affect Your Users ang )Apr 13, 2024 196 quality , craft , accessibility , usability , user-experience , performance Complete a VPAT: Show How Accessible Your Product Is deq )Apr 11, 2024 195 accessibility , vpat-acr , documentation How-To: 5 Steps to Detect Invalid HTML Breaking Your [Site’s Performance] erw )Apr 2, 2024 194 how-tos , html , performance How Invalid HTML Elements Impact Web Performance erw )Mar 26, 2024 193 html , performance My Web Development Wishlist 2024 j9t )Jan 7, 2024 192 community , user-experience , developer-experience , quality , wish-lists HTML Validation—Pros and Cons Dec 27, 2023 191 html The Top Accessibility Errors Found in 2023 tpg )Dec 21, 2023 190 accessibility , quality , errors , retrospectives Do You Really Need to Validate Your HTML Code? Nov 11, 2023 189 discussions , html 2023: 0 of the Global Top 100 Websites Use Valid HTML j9t )Oct 31, 2023 188 html , css , metrics , quality Why Unique ID Attributes Matter deq )Oct 19, 2023 187 accessibility , html , attributes On the Uniting Power of a Commitment to HTML Conformance j9t )Oct 18, 2023 186 html , quality , community , web Welcome WCAG 2.2 and Goodbye Success Criterion 4.1.1 “Parsing” cer )Oct 7, 2023 185 accessibility , wcag WCAG 2.2 and Validation Oct 6, 2023 184 accessibility , wcag , quality The Most Minimal Valid HTML Document j9t )Oct 2, 2023 183 html , minimalism , templates User Input Sanitization and Validation: Securing Your App Jul 19, 2023 182 security , sanitization , validation How to Validate HTML On-Line at W3C wie )Jul 5, 2023 181 how-tos , html , tooling Resources for Procurement of Accessible Digital Products and VPAT den )Jul 5, 2023 180 accessibility , vpat-acr , tooling , link-lists Meeting WCAG Level AAA pat /tet )Apr 21, 2023 179 accessibility , wcag , standards A Quick Guide to Reviewing a VPAT ACR kar )Mar 27, 2023 178 accessibility , vpat-acr , auditing Conformance and Accessibility j9t )Feb 28, 2023 177 accessibility , quality The Troublesome Life and Lamentable Death of Success Criterion 4.1.1 Feb 9, 2023 176 accessibility , wcag , standards Enforcing Better HTML Markup With Eleventy mat )Dec 23, 2022 175 html , semantics , eleventy Upgrade Your HTML IV j9t /fro )Nov 27, 2022 174 books , frontend-dogma , html , minimalism , craft Two Things I Learned by Validating My HTML Again Sep 24, 2022 173 html , lessons Invalid CSS cit )Sep 15, 2022 172 css 2022: 0 of the Global Top 100 Websites Use Valid HTML j9t )Sep 12, 2022 171 html , css , metrics , quality , craft Icon-Only Links Fail WCAG tem )Jun 20, 2022 170 accessibility , links , wcag , images , icons Top 2021 CSS Frameworks Report: Validation cit )May 6, 2022 169 studies , research , frameworks , css , quality Does Valid and Semantic HTML Still Matter? 5t3 +)Apr 18, 2022 168 podcasts , html , semantics Understanding the W3C’s Accessibility Conformance Testing (ACT) Requirements Feb 4, 2022 167 accessibility , testing Web Accessibility Lawsuits Dramatically Rose in 2021 Jan 12, 2022 166 accessibility , legal WCAG and Accessibility: What Is a Statement of Partial Conformance? Dec 29, 2021 165 accessibility , wcag The 3-Second Frontend Developer Test j9t )Jul 14, 2021 164 html , css , quality Why Validate? j9t )Jun 9, 2021 163 html , css , quality , craft 2021: 98% of the Top 100 US Websites Use Invalid HTML j9t )May 18, 2021 162 html , css , metrics , quality , craft Upgrade Your HTML III j9t /fro )May 13, 2021 161 books , frontend-dogma , html , minimalism , craft Upgrade Your HTML II j9t /fro )Nov 17, 2020 160 books , frontend-dogma , html , minimalism , craft Upgrade Your HTML (the Booklet) j9t )Nov 4, 2019 159 books , html , minimalism , craft No EPUBCheck, no EPUB w3c )Feb 12, 2019 158 epub , tooling HTML-validate Oct 17, 2017 157 websites , tooling , html JSON Validation by Committee Aug 31, 2015 156 ruby , json , validation A Vision of Web Development j9t )May 13, 2015 155 outlooks , minimalism , semantics , maintainability 10 Typical HTML Interview Exercises Nov 25, 2014 154 html , interviewing , semantics , aria Getting Started With HTML5 Apr 26, 2013 153 introductions , html , browsers , code-editors , dev-tools Google HTML/CSS Style Guide j9t )Apr 25, 2012 152 google , html , css , style-guides , quality , principles , formatting , naming , sorting New W3C Validation Service With RDFa 1.1 and Microdata iva /w3c )Feb 8, 2012 151 w3c , tooling , html , rdf , microdata Validation: Measuring and Tracking Code Quality j9t )Jul 11, 2011 150 html , css , quality , metrics But It Doesn’t Validate Nov 22, 2010 149 html , css , vendor-extensions The Value of HTML Validation nza )Aug 17, 2010 148 html CSS Validation and Vendor Extensions: Throw Warnings, Not Errors j9t )Jun 26, 2010 147 css , vendor-extensions W3C Validation: It’s Not Just About Rankings Nov 12, 2009 146 w3c , html , css , tooling , seo Let’s Make Every Day One Web Day! w3c )Sep 22, 2009 145 awareness-days , web , accessibility , internationalization , mobile The Big CSS3 Validation Debate Aug 31, 2009 144 css , vendor-extensions Absent Elements and Validation htm )Aug 25, 2009 143 html , attributes 10 Ways to Make Your XHTML Site Accessible Using Web Standards mri /sma )Jun 18, 2009 142 xhtml , accessibility , standards 14 Free Tools to Validate Your HTML, CSS, and RSS Feeds sea )May 29, 2009 141 html , css , rss , tooling , link-lists When Good Browsers Go Bad—and They All Do com )Feb 24, 2009 140 standards , support , internet-explorer , browsers The Two Great Things About Validation/Conformance j9t )Jan 30, 2009 139 html , css , quality , craft Valid Sites Work Better (?) oli /w3c )Jan 29, 2009 138 html , css HTML 5: Document Conformance w3c )Dec 16, 2008 137 html W3C Validators in Jeopardy mho )Dec 11, 2008 136 w3c , tooling W3C Markup Validation Service Adds Experimental HTML5 Support Nov 25, 2008 135 w3c , tooling , html W3C Validator, Now With HTML5 Flavour oli /w3c )Nov 21, 2008 134 w3c , html , tooling Five HTML Oddities That You May Not Know Nov 14, 2008 133 html , browsers 12 Principles for Clean HTML Code chr /sma )Nov 12, 2008 132 html , principles , encoding , formatting , naming , css Opera Study: Only 4.13% of the Web Is Standards-Compliant ars )Oct 16, 2008 131 studies , research , opera , standards , semantics Where Our Standards Went Wrong bee /ali )Sep 22, 2008 130 standards , quality When Validation Becomes Unimportant j9t )Jun 16, 2008 129 html , css , optimization , craft Using Flash and Staying Standards Compliant chr /css )May 26, 2008 128 flash , embed-code , jquery Conforming “target” Attribute lac )Apr 30, 2008 127 html , attributes , pop-ups A Validator Is Not an Accessibility Evaluation Tool? w3c )Apr 14, 2008 126 discussions , html , accessibility , alt-text , images , tooling Google Can’t Code Nov 28, 2007 125 google , html , quality What Beautiful HTML Code Looks Like chr /css )Nov 1, 2007 124 html , attributes , semantics , formatting The Craft of HTML kar /w3c )Aug 8, 2007 123 html , craft Top Blogs Fail W3C Markup Validation bpe )Aug 6, 2007 122 html , metrics Fixing the Web… Together! kar /w3c )Jun 15, 2007 121 html , xhtml , css , standards , quality An HTML5 Conformance Checker hsi )May 7, 2007 120 studies , html , parsing , history “Valid CSS” and Similar Claims Are Unprofessional j9t )Mar 9, 2007 119 html , css , wcag , professionalism Validator Web Service Interface Ideas hsi )Dec 14, 2006 118 web-services , tooling XML Validation in PHP Nov 8, 2006 117 php , xml , validation W3C Markup Validator, Link Checker Updated Oct 28, 2006 116 w3c , html , xhtml , links , link-rot , user-experience , tooling Bulletproof HTML: 37 Steps to Perfect Markup Oct 25, 2006 115 html , xhtml , encoding , unicode , character-references , semantics The Web Standards War Is Far From Over rob )Sep 20, 2006 114 standards , html A Positive Attitude to Development Sep 11, 2006 113 html , css , semantics , tables , hacks , browsers , accessibility , standards Unicorn Sighting (Public Preview) don /w3c )Sep 7, 2006 112 w3c , tooling , quality 8 Steps to Serving Better (X)HTML tan )Jul 27, 2006 111 html , xhtml , tables , metadata , internationalization , microformats , tips-and-tricks The Web Accessibility Myth in the UK Jul 24, 2006 110 accessibility , wcag , compliance , html , css , myths Following the XHTML Path Jul 12, 2006 109 xhtml , link-lists Ten Common CSS Mistakes Jun 19, 2006 108 css , mistakes WCAG 2.0 lac )Jun 7, 2006 107 wcag , standards , accessibility , compliance , terminology Invalid HTML Interfering With Accessibility ala )Jun 4, 2006 106 accessibility , html Is Standards Compliant HTML Really Necessary? Jun 2, 2006 105 html , browsers But It Validates! Apr 3, 2006 104 html , css Why Comply? The Movement to W3C Compliance Mar 31, 2006 103 w3c , standards Government Sites Fail Web Tests Mar 30, 2006 102 standards , html , compliance , accessibility , metrics Don’t Use JavaScript to Hide Bad Markup Mar 30, 2006 101 javascript , html , quality Validity Does Not Equal Best Practices Mar 20, 2006 100 html , css How to Sniff Out a Rotten Standardista mho )Feb 23, 2006 99 how-tos , standards , advocacy , community Buy Standards Compliant Web Sites kar /w3c )Feb 7, 2006 98 standards , compliance , professionalism , economics New W3C Feed Validation Service oli )Nov 21, 2005 97 discussions , w3c , syndication , rss , atom , tooling Government Web Standards Usage: New Zealand Oct 31, 2005 96 html , metrics Character References Explained lac )Oct 10, 2005 95 html , unicode , character-references W3C Compliance and SEO Oct 3, 2005 94 w3c , standards , compliance , accessibility , seo Ten Steps to a More User Friendly Website Sep 14, 2005 93 flash , performance , images , compression , link-rot , html , browsers , support , navigation , readability , quality Testing Invalid Content With Accessibility Validators gez )Aug 7, 2005 92 accessibility , testing , tooling , compliance , wave Validation Quiz Explanation lac )May 19, 2005 91 quizzes , html , xhtml , xml Markup Content Models ann )May 5, 2005 90 html Character Encodings and Input Apr 19, 2005 89 unicode , character-references , php Ampersands, PHP Sessions, and Valid HTML w3c )Apr 15, 2005 88 html , php , character-references Validating an Entire Site Apr 10, 2005 87 tooling , w3c Scripting Away Validation Concerns gez )Mar 23, 2005 86 xhtml , attributes , standards , javascript On Valid CSS ann )Mar 13, 2005 85 css Web Standards vs. Search Friendly Sites: Can You Have Both? Feb 10, 2005 84 standards , css , seo Validating a Custom DTD jde /ali )Feb 1, 2005 83 xhtml Why Standards-Compliant HTML Matters Jan 17, 2005 82 standards , html The Four Essentials of Modern Web Design Oct 27, 2004 81 fundamentals , accessibility , semantics , principles , quality Standards ann )Oct 16, 2004 80 standards , html , xhtml , xml Web Standards Compliant JavaScript Flash Detect and Embed Oct 14, 2004 79 flash , feature-detection , javascript Web Standards = 100% Validation? Oct 12, 2004 78 standards Does W3C Validation Help In Search Rankings? Sep 23, 2004 77 w3c , html , seo Quick Guide to XHTML ann )Aug 19, 2004 76 guides , xhtml , html , mime-types , unicode Validator Does Not Catch Certain Types of Invalid XHTML Markup Aug 6, 2004 75 xhtml , dreamweaver , code-editors HTML, XHTML, Semantics, and the Future of the Web joh )Jul 29, 2004 74 html , xhtml , semantics , web , outlooks , comparisons Design Sites Do Web Standards Jul 28, 2004 73 design , standards Integrated Web Design: Seven Deadly Markup Sins mho )Jul 9, 2004 72 design , encoding , doctypes , attributes , character-references , html , xhtml XHTML Is Invalid HTML ann )Jun 13, 2004 71 xhtml , html Canadian Election Web Sites Flunk Standards Test Jun 3, 2004 70 standards , accessibility , compliance , examples Influence of Valid Code on Screen Readers May 13, 2004 69 html , screen-readers , accessibility A Roadmap to Standards dav )Apr 30, 2004 68 standards , css , xml , xhtml , learning , link-lists CSS Validation dav )Feb 5, 2004 67 css CSS Validator Is Broken zel )Feb 5, 2004 66 css , tooling , w3c , hacks The Daily Standards Jan 23, 2004 65 websites , standards , metrics , comparisons Error Handling and Web Language Design Jan 22, 2004 64 errors , standards , html WaSP Interviews Todd Dominey wa )Dec 8, 2003 63 interviews , standards , refactoring , processes , css , html The Importance of Code Validation joh )Oct 20, 2003 62 standards , html , xhtml , css This Validates sim )Aug 27, 2003 61 semantics , xhtml On Standards and Semantics sto )Aug 26, 2003 60 standards , semantics Semantics and Bad Code dav )Aug 26, 2003 59 html , xhtml , semantics Standards Don’t Necessarily Have Anything to Do With Being Semantically Correct kot )Aug 26, 2003 58 standards , semantics , html , xhtml , css W3C Buttons Without Images Apr 2, 2003 57 w3c , xhtml , css Choosing Standards Compliance Over Proprietary Practices Mar 21, 2003 56 standards , interoperability , user-experience , quality ”HTML Validation” Is a Good Tool, but Just a Tool Mar 13, 2003 55 html , doctypes ESPN Moves Forward With Standards Feb 22, 2003 54 standards , case-studies URLs vs. XHTML dav )Feb 17, 2003 53 urls , xhtml Validate XML Against Multiple Schemas dan )Dec 18, 2002 52 xml Effects of CSS-Based Design dav )Dec 12, 2002 51 html , css , performance W3C Updates Validation Service Nov 28, 2002 50 html , xhtml , xml , tooling , w3c Flash Satay: Embedding Flash While Supporting Standards dre /ali )Nov 9, 2002 49 flash , embed-code W3C Members: What Standards? zdn )Sep 6, 2002 48 w3c , html , quality , standards Things Can Only Get Better Aug 22, 2002 47 html , standards , w3c , metrics Valid Garbage In, Valid Garbage Out: Answers Aug 18, 2002 46 html , semantics Buy Standards Compliant Web Sites don /w3c )Jul 4, 2002 45 standards , compliance , maintainability , accessibility , business-relations , economics Anil Dash Does Amazon sim )Jun 15, 2002 44 html , case-studies Valid Garbage In, Valid Garbage Out May 25, 2002 43 html , css Better Living Through XHTML zel /ali )Feb 15, 2002 42 xhtml , html HTML Syntax Checker in PHP hsi )Jan 30, 2002 41 html , php , tooling Any Browser vs. WaSP—Battle of the Purists Aug 25, 2001 40 html , netscape , browsers , web-standards-project “Forgiving” Browsers Considered Harmful jde /ali )Apr 27, 2001 39 html , xhtml , wysiwyg , parsing Validating XML in Internet Explorer Nov 14, 2000 38 xml , internet-explorer Conformance Testing for XML Processors Sep 15, 1999 37 xml , testing Purism vs. Layout—the Holy War Dec 31, 1998 36 layout , html , sgml , outlooks Validators Sep 24, 1998 35 html , quality , tooling , link-lists AMP Validator 34 tools , analysis , amp , google CSS Validator w3c )33 tools , analysis , css DAML Validator 32 tools , analysis Facebook Validator 31 tools , analysis , facebook+meta hCard Validator 30 tools , analysis , microformats HTML Validator w3c )29 tools , analysis , html LinkedIn Validator 28 tools , analysis , social-media P3P Validator w3c )27 tools , analysis , privacy , p3p robots.txt Validator (Merkle) max )26 tools , analysis , seo , robotstxt RSS and Atom Feed Validator w3c )25 tools , analysis , rss , atom SBML Validator 24 tools , analysis Sitemap Validator 23 tools , analysis , sitemaps SVG Validator 22 tools , analysis , svg XML-RPC Validator 21 tools , analysis , xml XML Validator 20 tools , analysis , xml Content Security Policy Validator (CSP Validator) 19 tools , analysis , security , csp Content Security Policy Validator (Google) 18 tools , analysis , security , csp Unquoted Attribute Value Validator mat )17 tools , exploration , auditing , debugging , html , attributes HTML Nesting Checker 16 tools , exploration , optimization , html , nesting JSON Validator (JSON Compare) 15 tools , exploration , optimization , json JSON Validator (JSONLint) 14 tools , exploration , optimization , json YAML Validator 13 tools , exploration , optimization , yaml ISBN Checker and Formatter 12 tools , exploration AMP Bulk Validator max )11 tools , analysis , amp , google JavaScript Validator 10 tools , exploration , optimization , javascript WebVTT Validator ann /w3c )9 tools , exploration , optimization , captions , accessibility JavaScript Variable Name Validator mat )8 tools , exploration , optimization , javascript SHACL Validator 7 tools , analysis , structured-data Design Token Validator and )6 tools , exploration , optimization , design-tokens robots.txt Validator (Logeix) 5 tools , analysis , seo , robotstxt Twitter/X Validator 4 tools , analysis , social-media , twitter+x EPUB Validator 3 tools , exploration , epub XML Well-Formedness Checker and Validator 2 tools , analysis , xml XML Schema Validator 1 tools , analysis , xml 