diff --git a/README.md b/README.md
index f6e2fb9..be5c134 100644
--- a/README.md
+++ b/README.md
@@ -574,6 +574,7 @@ Only main chapters:
 &nbsp;&nbsp;:small_orange_diamond: <a href="http://sandbox.onlinephpfunctions.com/"><b>PHP Sandbox</b></a> - test your PHP code with this code tester.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.repl.it/"><b>Repl.it</b></a> - an instant IDE to learn, build, collaborate, and host all in one place.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.vclfiddle.net/"><b>vclFiddle</b></a> - is an online tool for experimenting with the Varnish Cache VCL.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://format-express.dev/"><b>FormatExpress</b></a> - online formatter and syntax highlighter for JSON, XML, HTML, CSS, SQL, etc.<br>
 </p>
 
 ##### :black_small_square: Performance