diff --git a/more/free-programming-playgrounds.md b/more/free-programming-playgrounds.md
index e86120216078904588dae9264c58dc602ec93d46..c8cd57693d4b63a299f6fbb42f8f897abfffae2c 100644
--- a/more/free-programming-playgrounds.md
+++ b/more/free-programming-playgrounds.md
@@ -33,6 +33,7 @@
 * [Rust](#rust)
 * [RxJS](#rxjs)
 * [Scala](#scala)
+* [Solidity](#solidity)
 * [SQL](#sql)
 * [Svelte](#svelte)
 * [Swift](#swift)
@@ -246,6 +247,11 @@
 * [Scastie](https://scastie.scala-lang.org)
 
 
+### Solidity
+
+* [Remix IDE](https://remix.ethereum.org)
+
+
 ### SQL
 
 * [Extends Class](https://extendsclass.com/sqlite-browser.html)