diff --git a/core/src/lib.rs b/core/src/lib.rs
index f7b490f9dd62..706b34fcf31d 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -154,6 +154,12 @@
 
 // Make sure all our public APIs have docs.
 #![deny(missing_docs)]
+// WASI supports are still unstable
+#![cfg_attr(
+    all(feature = "services-fs", target_arch = "wasm32"),
+    feature(wasi_ext)
+)]
+#![cfg_attr(all(feature = "services-fs", target_arch = "wasm32"), feature(wasip2))]
 
 // Private module with public types, they will be accessed via `opendal::Xxxx`
 mod types;
diff --git a/core/src/raw/adapters/kv/api.rs b/core/src/raw/adapters/kv/api.rs
index 161ed8e18c15..dd28d0dda82b 100644
--- a/core/src/raw/adapters/kv/api.rs
+++ b/core/src/raw/adapters/kv/api.rs
@@ -42,6 +42,7 @@ impl Scan for () {
 }
 
 /// A Scan implementation for all trivial non-async iterators
+#[cfg(any(feature = "services-rocksdb", feature = "services-sled"))]
 pub struct ScanStdIter<I>(I);
 
 #[cfg(any(feature = "services-rocksdb", feature = "services-sled"))]
@@ -55,6 +56,7 @@ where
     }
 }
 
+#[cfg(any(feature = "services-rocksdb", feature = "services-sled"))]
 impl<I> Scan for ScanStdIter<I>
 where
     I: Iterator<Item = Result<String>> + Unpin + Send + Sync,
diff --git a/core/src/raw/http_util/client.rs b/core/src/raw/http_util/client.rs
index 584cc51d0209..f8b07a287992 100644
--- a/core/src/raw/http_util/client.rs
+++ b/core/src/raw/http_util/client.rs
@@ -15,26 +15,19 @@
 // specific language governing permissions and limitations
 // under the License.
 
-use std::convert::Infallible;
 use std::fmt::Debug;
 use std::fmt::Formatter;
 use std::future;
 use std::mem;
 use std::ops::Deref;
-use std::pin::Pin;
 use std::str::FromStr;
 use std::sync::Arc;
 use std::sync::LazyLock;
-use std::task::Context;
-use std::task::Poll;
 
-use bytes::Bytes;
 use futures::Future;
 use futures::TryStreamExt;
 use http::Request;
 use http::Response;
-use http_body::Frame;
-use http_body::SizeHint;
 use raw::oio::Read;
 
 use super::parse_content_encoding;
@@ -180,7 +173,7 @@ impl HttpFetch for reqwest::Client {
         if !body.is_empty() {
             #[cfg(not(target_arch = "wasm32"))]
             {
-                req_builder = req_builder.body(reqwest::Body::wrap(HttpBufferBody(body)))
+                req_builder = req_builder.body(reqwest::Body::wrap(body::HttpBufferBody(body)))
             }
             #[cfg(target_arch = "wasm32")]
             {
@@ -250,27 +243,39 @@ fn is_temporary_error(err: &reqwest::Error) -> bool {
     err.is_decode()
 }
 
-struct HttpBufferBody(Buffer);
-
-impl http_body::Body for HttpBufferBody {
-    type Data = Bytes;
-    type Error = Infallible;
-
-    fn poll_frame(
-        mut self: Pin<&mut Self>,
-        _: &mut Context<'_>,
-    ) -> Poll<Option<Result<Frame<Self::Data>, Self::Error>>> {
-        match self.0.next() {
-            Some(bs) => Poll::Ready(Some(Ok(Frame::data(bs)))),
-            None => Poll::Ready(None),
+#[cfg(not(target_arch = "wasm32"))]
+mod body {
+    use std::convert::Infallible;
+    use std::pin::Pin;
+    use std::task::Context;
+    use std::task::Poll;
+
+    use bytes::Bytes;
+    use http_body::Frame;
+    use http_body::SizeHint;
+
+    pub(super) struct HttpBufferBody(pub(super) super::Buffer);
+
+    impl http_body::Body for HttpBufferBody {
+        type Data = Bytes;
+        type Error = Infallible;
+
+        fn poll_frame(
+            mut self: Pin<&mut Self>,
+            _: &mut Context<'_>,
+        ) -> Poll<Option<Result<Frame<Self::Data>, Self::Error>>> {
+            match self.0.next() {
+                Some(bs) => Poll::Ready(Some(Ok(Frame::data(bs)))),
+                None => Poll::Ready(None),
+            }
         }
-    }
 
-    fn is_end_stream(&self) -> bool {
-        self.0.is_empty()
-    }
+        fn is_end_stream(&self) -> bool {
+            self.0.is_empty()
+        }
 
-    fn size_hint(&self) -> SizeHint {
-        SizeHint::with_exact(self.0.len() as u64)
+        fn size_hint(&self) -> SizeHint {
+            SizeHint::with_exact(self.0.len() as u64)
+        }
     }
 }
diff --git a/core/src/services/fs/writer.rs b/core/src/services/fs/writer.rs
index ff4e3ba348fb..b6942a013c79 100644
--- a/core/src/services/fs/writer.rs
+++ b/core/src/services/fs/writer.rs
@@ -210,3 +210,9 @@ fn write_at(f: &File, buf: &[u8], offset: u64) -> Result<usize> {
     use std::os::unix::fs::FileExt;
     f.write_at(buf, offset).map_err(new_std_io_error)
 }
+
+#[cfg(target_os = "wasi")]
+fn write_at(f: &File, buf: &[u8], offset: u64) -> Result<usize> {
+    use std::os::wasi::fs::FileExt;
+    f.write_at(buf, offset).map_err(new_std_io_error)
+}
diff --git a/core/src/types/execute/executors/tokio_executor.rs b/core/src/types/execute/executors/tokio_executor.rs
index 313384c72084..ef76e291a55f 100644
--- a/core/src/types/execute/executors/tokio_executor.rs
+++ b/core/src/types/execute/executors/tokio_executor.rs
@@ -25,7 +25,11 @@ pub struct TokioExecutor {}
 impl Execute for TokioExecutor {
     /// Tokio's JoinHandle has its own `abort` support, so dropping handle won't cancel the task.
     fn execute(&self, f: BoxedStaticFuture<()>) {
+        #[cfg(not(target_arch = "wasm32"))]
         let _handle = tokio::task::spawn(f);
+
+        #[cfg(target_arch = "wasm32")]
+        let _handle = tokio::task::spawn_local(f);
     }
 }