From 139faf881a948ad01320097b06af0f662115f519 Mon Sep 17 00:00:00 2001
From: nbats <44333466+nbats@users.noreply.github.com>
Date: Sat, 8 Jan 2022 23:17:05 -0800
Subject: [PATCH] Update DEVTools.md

---
 DEVTools.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/DEVTools.md b/DEVTools.md
index cee5475ef..314f275d0 100644
--- a/DEVTools.md
+++ b/DEVTools.md
@@ -462,6 +462,7 @@
 * [HTML Reference](https://htmlreference.io/) - *HTML Guide* 
 * [HTML Compressor](https://htmlcompressor.com/compressor/)
 * [HTML Notepad](https://html-notepad.com/) - *HTML Editor*
+* [Markup Validation Service](https://validator.w3.org/) - *Validate Your Markup Language Structure*
 * [typeset](https://typeset.lllllllllllllllll.com/) - *HTML Typography Pre-Processor*
 * [TryIt HTML](https://www.w3schools.com/html/tryit.asp?filename=tryhtml_intro), [CodeTester](http://codetester.org/), [HTML-Online](https://html-online.com/editor/), [html.cafe](https://html.cafe/) or [jsTester](https://www.cs.iupui.edu/~ajharris/webprog/jsTester.html) - *Online HTML Editors / Testers* 
 * [HTMLColorCodes](https://htmlcolorcodes.com/) - *HTML Color Codes*