diff --git a/web/build.gradle.kts b/web/build.gradle.kts
index 3d41adc..b82b201 100644
--- a/web/build.gradle.kts
+++ b/web/build.gradle.kts
@@ -27,6 +27,8 @@ kotlin {
 
     sourceSets {
         val main by getting {
+            kotlin.srcDirs("src/jsMain/kotlin")
+            resources.srcDirs("src/jsMain/resources")
             dependencies {
                 implementation("org.jetbrains.kotlin:kotlin-stdlib-js:$kotlinVersion")
                 implementation("org.jetbrains.kotlin-wrappers:kotlin-react:$reactVersion-$jsWrappersVersion-kotlin-$kotlinVersion")
diff --git a/web/serviceworker/build.gradle.kts b/web/serviceworker/build.gradle.kts
index c1a7891..ce46e6a 100644
--- a/web/serviceworker/build.gradle.kts
+++ b/web/serviceworker/build.gradle.kts
@@ -17,6 +17,7 @@ kotlin {
 
     sourceSets {
         val main by getting {
+            kotlin.srcDirs("src/jsMain/kotlin")
             dependencies {
                 implementation("org.jetbrains.kotlin:kotlin-stdlib-js:$kotlinVersion")
             }
diff --git a/web/serviceworker/src/main/kotlin/it/krzeminski/fsynth/web/serviceworker/main.kt b/web/serviceworker/src/jsMain/kotlin/it/krzeminski/fsynth/web/serviceworker/main.kt
similarity index 100%
rename from web/serviceworker/src/main/kotlin/it/krzeminski/fsynth/web/serviceworker/main.kt
rename to web/serviceworker/src/jsMain/kotlin/it/krzeminski/fsynth/web/serviceworker/main.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/PlaybackCustomization.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/PlaybackCustomization.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/PlaybackCustomization.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/PlaybackCustomization.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/Player.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/Player.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/Player.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/Player.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/SynthesisWorkerProxy.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/SynthesisWorkerProxy.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/SynthesisWorkerProxy.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/SynthesisWorkerProxy.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/VersionInfo.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/VersionInfo.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/VersionInfo.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/VersionInfo.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/Wavesurfer.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/Wavesurfer.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/Wavesurfer.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/Wavesurfer.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/main.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/main.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/main.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/main.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/typings/AudioBufferToWav.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/typings/AudioBufferToWav.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/typings/AudioBufferToWav.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/typings/AudioBufferToWav.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/typings/AudioRelatedClasses.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/typings/AudioRelatedClasses.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/typings/AudioRelatedClasses.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/typings/AudioRelatedClasses.kt
diff --git a/web/src/main/kotlin/it/krzeminski/fsynth/typings/WaveSurfer.kt b/web/src/jsMain/kotlin/it/krzeminski/fsynth/typings/WaveSurfer.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/fsynth/typings/WaveSurfer.kt
rename to web/src/jsMain/kotlin/it/krzeminski/fsynth/typings/WaveSurfer.kt
diff --git a/web/src/main/kotlin/it/krzeminski/testutils/TimeMeasurement.kt b/web/src/jsMain/kotlin/it/krzeminski/testutils/TimeMeasurement.kt
similarity index 100%
rename from web/src/main/kotlin/it/krzeminski/testutils/TimeMeasurement.kt
rename to web/src/jsMain/kotlin/it/krzeminski/testutils/TimeMeasurement.kt
diff --git a/web/src/main/resources/Logo.svg b/web/src/jsMain/resources/Logo.svg
similarity index 100%
rename from web/src/main/resources/Logo.svg
rename to web/src/jsMain/resources/Logo.svg
diff --git a/web/src/main/resources/index.html b/web/src/jsMain/resources/index.html
similarity index 100%
rename from web/src/main/resources/index.html
rename to web/src/jsMain/resources/index.html
diff --git a/web/src/main/resources/manifest.webmanifest b/web/src/jsMain/resources/manifest.webmanifest
similarity index 100%
rename from web/src/main/resources/manifest.webmanifest
rename to web/src/jsMain/resources/manifest.webmanifest
diff --git a/web/worker/build.gradle.kts b/web/worker/build.gradle.kts
index 67ae00a..86ac9d0 100644
--- a/web/worker/build.gradle.kts
+++ b/web/worker/build.gradle.kts
@@ -17,6 +17,7 @@ kotlin {
 
     sourceSets {
         val main by getting {
+            kotlin.srcDirs("src/jsMain/kotlin")
             dependencies {
                 implementation("org.jetbrains.kotlin:kotlin-stdlib-js:$kotlinVersion")
                 implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core-js:1.4.3-native-mt")
diff --git a/web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/WebSoundRendering.kt b/web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/WebSoundRendering.kt
similarity index 100%
rename from web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/WebSoundRendering.kt
rename to web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/WebSoundRendering.kt
diff --git a/web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/main.kt b/web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/main.kt
similarity index 100%
rename from web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/main.kt
rename to web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/main.kt
diff --git a/web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/testutils/TimeMeasurement.kt b/web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/testutils/TimeMeasurement.kt
similarity index 100%
rename from web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/testutils/TimeMeasurement.kt
rename to web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/testutils/TimeMeasurement.kt
diff --git a/web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/typings/AudioRelatedClasses.kt b/web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/typings/AudioRelatedClasses.kt
similarity index 100%
rename from web/worker/src/main/kotlin/it/krzeminski/fsynth/web/worker/typings/AudioRelatedClasses.kt
rename to web/worker/src/jsMain/kotlin/it/krzeminski/fsynth/web/worker/typings/AudioRelatedClasses.kt