diff --git a/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala b/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
new file mode 100644
index 0000000..9534d20
--- /dev/null
+++ b/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
@@ -0,0 +1,22 @@
+package works.iterative.tapir
+
+import zio.*
+
+trait BaseUriPlatformSpecific:
+  def fromLocation: BaseUri = BaseUri(
+    org.scalajs.dom.window.location.href
+      .split("/")
+      .dropRight(1)
+      .mkString("/")
+  )
+
+  def fromLocation(upTo: String): BaseUri = BaseUri(
+    org.scalajs.dom.window.location.href
+      .split("/")
+      .takeWhile(_ != upTo)
+      .mkString("/")
+  )
+
+  val layer: ULayer[BaseUri] = ZLayer.succeed(fromLocation)
+  def layer(upTo: String): ULayer[BaseUri] =
+    ZLayer.succeed(fromLocation(upTo))

diff --git a/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala b/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
new file mode 100644
index 0000000..9534d20
--- /dev/null
+++ b/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
@@ -0,0 +1,22 @@
+package works.iterative.tapir
+
+import zio.*
+
+trait BaseUriPlatformSpecific:
+  def fromLocation: BaseUri = BaseUri(
+    org.scalajs.dom.window.location.href
+      .split("/")
+      .dropRight(1)
+      .mkString("/")
+  )
+
+  def fromLocation(upTo: String): BaseUri = BaseUri(
+    org.scalajs.dom.window.location.href
+      .split("/")
+      .takeWhile(_ != upTo)
+      .mkString("/")
+  )
+
+  val layer: ULayer[BaseUri] = ZLayer.succeed(fromLocation)
+  def layer(upTo: String): ULayer[BaseUri] =
+    ZLayer.succeed(fromLocation(upTo))
diff --git a/tapir/jvm/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala b/tapir/jvm/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
new file mode 100644
index 0000000..4834683
--- /dev/null
+++ b/tapir/jvm/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
@@ -0,0 +1,3 @@
+package works.iterative.tapir
+
+trait BaseUriPlatformSpecific

diff --git a/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala b/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
new file mode 100644
index 0000000..9534d20
--- /dev/null
+++ b/tapir/js/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
@@ -0,0 +1,22 @@
+package works.iterative.tapir
+
+import zio.*
+
+trait BaseUriPlatformSpecific:
+  def fromLocation: BaseUri = BaseUri(
+    org.scalajs.dom.window.location.href
+      .split("/")
+      .dropRight(1)
+      .mkString("/")
+  )
+
+  def fromLocation(upTo: String): BaseUri = BaseUri(
+    org.scalajs.dom.window.location.href
+      .split("/")
+      .takeWhile(_ != upTo)
+      .mkString("/")
+  )
+
+  val layer: ULayer[BaseUri] = ZLayer.succeed(fromLocation)
+  def layer(upTo: String): ULayer[BaseUri] =
+    ZLayer.succeed(fromLocation(upTo))
diff --git a/tapir/jvm/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala b/tapir/jvm/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
new file mode 100644
index 0000000..4834683
--- /dev/null
+++ b/tapir/jvm/src/main/scala/works/iterative/tapir/BaseUriPlatformSpecific.scala
@@ -0,0 +1,3 @@
+package works.iterative.tapir
+
+trait BaseUriPlatformSpecific
diff --git a/tapir/shared/src/main/scala/works/iterative/tapir/BaseUri.scala b/tapir/shared/src/main/scala/works/iterative/tapir/BaseUri.scala
index a8d4d4d..278bfde 100644
--- a/tapir/shared/src/main/scala/works/iterative/tapir/BaseUri.scala
+++ b/tapir/shared/src/main/scala/works/iterative/tapir/BaseUri.scala
@@ -5,7 +5,8 @@
 
 case class BaseUri(value: Option[Uri])
 
-object BaseUri:
+object BaseUri extends BaseUriPlatformSpecific:
+  def apply(s: String): BaseUri = BaseUri(Some(uri"$s"))
   def apply(u: Uri): BaseUri = BaseUri(Some(u))
   extension (v: BaseUri)
     def toUri: Option[Uri] = v.value