diff --git a/libraries/stdlib/wasm/src/kotlin/random/Random.kt b/libraries/stdlib/wasm/src/kotlin/random/PlatformRandom.kt
similarity index 54%
rename from libraries/stdlib/wasm/src/kotlin/random/Random.kt
rename to libraries/stdlib/wasm/src/kotlin/random/PlatformRandom.kt
index 4270affaaec..5a320d56e75 100644
--- a/libraries/stdlib/wasm/src/kotlin/random/Random.kt
+++ b/libraries/stdlib/wasm/src/kotlin/random/PlatformRandom.kt
@@ -5,5 +5,11 @@
 
 package kotlin.random
 
-internal actual fun defaultPlatformRandom(): Random = TODO("Wasm stdlib: Random")
-internal actual fun doubleFromParts(hi26: Int, low27: Int): Double = TODO("Wasm stdlib: Random")
+@JsFun("() => ((Math.random() * Math.pow(2, 32)) | 0)")
+private external fun initialSeed(): Int
+
+internal actual fun defaultPlatformRandom(): Random =
+    Random(initialSeed())
+
+internal actual fun doubleFromParts(hi26: Int, low27: Int): Double =
+    (hi26.toLong().shl(27) + low27) / (1L shl 53).toDouble()