diff --git a/.gitignore b/.gitignore
index d0f9417..17ad73f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
-/target
+target
+pkg
 **/*.rs.bk
 
 .idea
diff --git a/Cargo.lock b/Cargo.lock
index aea09ad..6678919 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -651,7 +651,6 @@ dependencies = [
  "failure",
  "futures",
  "http",
- "hyper",
  "lazy_static",
  "os_type",
  "percent-encoding",
diff --git a/elasticsearch/Cargo.toml b/elasticsearch/Cargo.toml
index 7926702..a3eb3d6 100644
--- a/elasticsearch/Cargo.toml
+++ b/elasticsearch/Cargo.toml
@@ -36,9 +36,16 @@ url = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 serde_with = "3"
-tokio = { version = "1", default-features = false, features = ["macros", "net", "time", "rt-multi-thread"] }
+
+
+#tokio = { version = "1", default-features = false, features = ["macros", "net", "time", "rt-multi-thread"] }
 void = "1"
 
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies.tokio]
+version = "1.0"
+default-features = false
+features = ["macros", "net", "time", "rt-multi-thread"]
+
 [dev-dependencies]
 chrono = { version = "0.4", features = ["serde"] }
 clap = { version = "4", features = ["env"]}
@@ -46,7 +53,7 @@ failure = "0.1"
 futures = "0.3"
 http = "1"
 axum = "0.7"
-hyper = { version = "1", features = ["server", "http1"] }
+#hyper = { version = "1", features = ["server", "http1"] }
 os_type = "2"
 regex="1"
 #sysinfo = "0.31"
diff --git a/elasticsearch/src/http/transport.rs b/elasticsearch/src/http/transport.rs
index 44b0135..42a7136 100644
--- a/elasticsearch/src/http/transport.rs
+++ b/elasticsearch/src/http/transport.rs
@@ -18,6 +18,9 @@
  */
 //! HTTP transport and connection components
 
+#[cfg(all(target_arch = "wasm32", any(feature = "native-tls", feature = "rustls-tls")))]
+compile_error!("TLS features are not compatible with the wasm target");
+
 #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
 use crate::auth::ClientCertificate;
 #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
@@ -130,6 +133,8 @@ fn build_meta() -> String {
         meta.push_str(",tls=n");
     } else if cfg!(feature = "rustls-tls") {
         meta.push_str(",tls=r");
+    } else if cfg!(target_arch = "wasm32") {
+        meta.push_str(",tls=w");
     }
 
     meta
@@ -138,15 +143,19 @@ fn build_meta() -> String {
 /// Builds a HTTP transport to make API calls to Elasticsearch
 pub struct TransportBuilder {
     client_builder: reqwest::ClientBuilder,
-    conn_pool: Box<dyn ConnectionPool>,
+    conn_pool: Arc<dyn ConnectionPool>,
     credentials: Option<Credentials>,
     #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
     cert_validation: Option<CertificateValidation>,
+    #[cfg(not(target_arch = "wasm32"))]
     proxy: Option<Url>,
+    #[cfg(not(target_arch = "wasm32"))]
     proxy_credentials: Option<Credentials>,
+    #[cfg(not(target_arch = "wasm32"))]
     disable_proxy: bool,
     headers: HeaderMap,
     meta_header: bool,
+    #[cfg(not(target_arch = "wasm32"))]
     timeout: Option<Duration>,
 }
 
@@ -159,15 +168,19 @@ impl TransportBuilder {
     {
         Self {
             client_builder: reqwest::ClientBuilder::new(),
-            conn_pool: Box::new(conn_pool),
+            conn_pool: Arc::new(conn_pool),
             credentials: None,
             #[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
             cert_validation: None,
+            #[cfg(not(target_arch = "wasm32"))]
             proxy: None,
+            #[cfg(not(target_arch = "wasm32"))]
             proxy_credentials: None,
+            #[cfg(not(target_arch = "wasm32"))]
             disable_proxy: false,
             headers: HeaderMap::new(),
             meta_header: true,
+            #[cfg(not(target_arch = "wasm32"))]
             timeout: None,
         }
     }
@@ -176,6 +189,7 @@ impl TransportBuilder {
     ///
     /// An optional username and password will be used to set the
     /// `Proxy-Authorization` header using Basic Authentication.
+    #[cfg(not(target_arch = "wasm32"))]
     pub fn proxy(mut self, url: Url, username: Option<&str>, password: Option<&str>) -> Self {
         self.proxy = Some(url);
         if let Some(u) = username {
@@ -189,6 +203,7 @@ impl TransportBuilder {
     /// Whether to disable proxies, including system proxies.
     ///
     /// NOTE: System proxies are enabled by default.
+    #[cfg(not(target_arch = "wasm32"))]
     pub fn disable_proxy(mut self) -> Self {
         self.disable_proxy = true;
         self
@@ -241,6 +256,7 @@ impl TransportBuilder {
     ///
     /// The timeout is applied from when the request starts connecting until the response body has finished.
     /// Default is no timeout.
+    #[cfg(not(target_arch = "wasm32"))]
     pub fn timeout(mut self, timeout: Duration) -> Self {
         self.timeout = Some(timeout);
         self
@@ -254,6 +270,7 @@ impl TransportBuilder {
             client_builder = client_builder.default_headers(self.headers);
         }
 
+        #[cfg(not(target_arch = "wasm32"))]
         if let Some(t) = self.timeout {
             client_builder = client_builder.timeout(t);
         }
@@ -300,6 +317,7 @@ impl TransportBuilder {
             }
         }
 
+        #[cfg(not(target_arch = "wasm32"))]
         if self.disable_proxy {
             client_builder = client_builder.no_proxy();
         } else if let Some(url) = self.proxy {
@@ -316,7 +334,7 @@ impl TransportBuilder {
         let client = client_builder.build()?;
         Ok(Transport {
             client,
-            conn_pool: Arc::new(self.conn_pool),
+            conn_pool: self.conn_pool,
             credentials: self.credentials,
             send_meta: self.meta_header,
         })
@@ -363,7 +381,7 @@ impl Connection {
 pub struct Transport {
     client: reqwest::Client,
     credentials: Option<Credentials>,
-    conn_pool: Arc<Box<dyn ConnectionPool>>,
+    conn_pool: Arc<dyn ConnectionPool>,
     send_meta: bool,
 }
 
@@ -463,6 +481,7 @@ impl Transport {
         headers: HeaderMap,
         query_string: Option<&Q>,
         body: Option<B>,
+        #[allow(unused_variables)]
         timeout: Option<Duration>,
     ) -> Result<reqwest::RequestBuilder, Error>
     where
@@ -473,6 +492,7 @@ impl Transport {
         let url = connection.url.join(path.trim_start_matches('/'))?;
         let mut request_builder = self.client.request(reqwest_method, url);
 
+        #[cfg(not(target_arch = "wasm32"))]
         if let Some(t) = timeout {
             request_builder = request_builder.timeout(t);
         }
@@ -564,6 +584,47 @@ impl Transport {
         )?)
     }
 
+    async fn reseed(&self) {
+        // Requests will execute against old connection pool during reseed
+        let connection = self.conn_pool.next();
+
+        // Build node info request
+        let node_request = self.request_builder(
+            &connection,
+            Method::Get,
+            "_nodes/http?filter_path=nodes.*.http",
+            HeaderMap::default(),
+            None::<&()>,
+            None::<()>,
+            None,
+        ).unwrap();
+
+        let scheme = connection.url.scheme();
+        let resp = node_request.send().await.unwrap();
+        let json: Value = resp.json().await.unwrap();
+        let connections: Vec<Connection> = json["nodes"]
+            .as_object()
+            .unwrap()
+            .iter()
+            .map(|(_, node)| {
+                let address = node["http"]["publish_address"]
+                    .as_str()
+                    .or_else(|| {
+                        Some(
+                            node["http"]["bound_address"].as_array().unwrap()[0]
+                                .as_str()
+                                .unwrap(),
+                        )
+                    })
+                    .unwrap();
+                let url = Self::parse_to_url(address, scheme).unwrap();
+                Connection::new(url)
+            })
+            .collect();
+
+        self.conn_pool.reseed(connections);
+    }
+
     /// Creates an asynchronous request that can be awaited
     pub async fn send<B, Q>(
         &self,
@@ -578,47 +639,19 @@ impl Transport {
         B: Body,
         Q: Serialize + ?Sized,
     {
-        // Requests will execute against old connection pool during reseed
         if self.conn_pool.reseedable() {
-            let conn_pool = self.conn_pool.clone();
-            let connection = conn_pool.next();
-
-            // Build node info request
-            let node_request = self.request_builder(
-                &connection,
-                Method::Get,
-                "_nodes/http?filter_path=nodes.*.http",
-                headers.clone(),
-                None::<&Q>,
-                None::<B>,
-                timeout,
-            )?;
-
-            tokio::spawn(async move {
-                let scheme = connection.url.scheme();
-                let resp = node_request.send().await.unwrap();
-                let json: Value = resp.json().await.unwrap();
-                let connections: Vec<Connection> = json["nodes"]
-                    .as_object()
-                    .unwrap()
-                    .iter()
-                    .map(|(_, node)| {
-                        let address = node["http"]["publish_address"]
-                            .as_str()
-                            .or_else(|| {
-                                Some(
-                                    node["http"]["bound_address"].as_array().unwrap()[0]
-                                        .as_str()
-                                        .unwrap(),
-                                )
-                            })
-                            .unwrap();
-                        let url = Self::parse_to_url(address, scheme).unwrap();
-                        Connection::new(url)
-                    })
-                    .collect();
-                conn_pool.reseed(connections);
-            });
+            #[cfg(not(target_arch = "wasm32"))]
+            {
+                let transport = self.clone();
+                tokio::spawn(async move { transport.reseed().await });
+            }
+            #[cfg(target_arch = "wasm32")]
+            {
+                // Reseed synchronously (i.e. do not spawn a background task) in WASM.
+                // Running in the background is platform-dependent (web-sys / wasi), we'll
+                // address this if synchronous reseed is an issue.
+                self.reseed().await
+            }
         }
 
         let connection = self.conn_pool.next();
diff --git a/elasticsearch/src/lib.rs b/elasticsearch/src/lib.rs
index 326ea28..342c331 100644
--- a/elasticsearch/src/lib.rs
+++ b/elasticsearch/src/lib.rs
@@ -371,10 +371,12 @@ mod readme {
 extern crate dyn_clone;
 
 pub mod auth;
-pub mod cert;
 pub mod http;
 pub mod params;
 
+#[cfg(not(target_arch = "wasm32"))]
+pub mod cert;
+
 // GENERATED-BEGIN:namespace-modules
 // Generated code - do not edit until the next GENERATED-END marker
 
diff --git a/examples/README.md b/examples/README.md
new file mode 100644
index 0000000..2fddb53
--- /dev/null
+++ b/examples/README.md
@@ -0,0 +1,3 @@
+This directory contains standalone examples that need their own independent build configuration.
+
+Other examples can also be found in [`elasticsearch/examples`](../elasticsearch/examples/).
diff --git a/examples/wasm_fetch/Cargo.lock b/examples/wasm_fetch/Cargo.lock
new file mode 100644
index 0000000..1d44c82
--- /dev/null
+++ b/examples/wasm_fetch/Cargo.lock
@@ -0,0 +1,1286 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
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+]
+
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diff --git a/examples/wasm_fetch/Cargo.toml b/examples/wasm_fetch/Cargo.toml
new file mode 100644
index 0000000..9c731ad
--- /dev/null
+++ b/examples/wasm_fetch/Cargo.toml
@@ -0,0 +1,37 @@
+[package]
+name = "example_wasm_fetch"
+version = "0.1.0"
+publish = false
+authors = ["Elastic and Contributors"]
+edition = "2021"
+
+[workspace] # not part of the parent workspace
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+wasm-bindgen = "0.2"
+wasm-bindgen-futures = "0.4"
+web-sys = { version = "0.3", features = ["console"] }
+
+elasticsearch = { path = "../../elasticsearch", default-features = false }
+serde = "1"
+serde_json = "1"
+url = "2"
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
diff --git a/examples/wasm_fetch/README.md b/examples/wasm_fetch/README.md
new file mode 100644
index 0000000..6b965c7
--- /dev/null
+++ b/examples/wasm_fetch/README.md
@@ -0,0 +1,35 @@
+# Using elasticsearch-rs in Web Assembly
+
+`elasticsearch-rs` runs in Web Assembly runtimes where [the Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) is available. This includes web browsers, node.js and any system based on node.js like Cloudflare workers.
+
+Using the Fetch API is automatically enabled when the target architecture is `wasm`. Note that in this context, the `rustls-tls` and `native-tls` features should not be used (and will cause compilation errors) as TLS encryption is handled by the Fetch API.
+
+**The example**
+
+This is a browser-based demonstration. The [`index.html`](index.html) web page asks for Elasticsearch URL, login and password and returns the server's version and build date.
+
+The Elasticsearch server must have [CORS enabled](https://www.elastic.co/guide/en/elasticsearch/reference/8.1/modules-network.html#http-settings) with the following configuration in `elasticsearch.yml` (on [Elastic Cloud](https://cloud.elastic.co/), you can add this in "Manage user settings and extensions"):
+
+```yaml
+http.cors.enabled: true
+http.cors.allow-origin: "*"  # avoid this in production
+http.cors.allow-credentials: true
+```
+
+If using Elastisearch older than version 8.8.0, also add this configuration:
+```yaml
+http.cors.allow-headers: Content-Type, Content-Length, Authorization, Accept, User-Agent, X-Elastic-Client-Meta
+```
+
+
+After [installing the `wasm-pack` CLI](https://rustwasm.github.io/docs/wasm-pack/), run: 
+
+```
+# Build
+wasm-pack build --target web
+
+# Serve the files
+python3 -m http.server
+
+# Open http://localhost:8000
+```
diff --git a/examples/wasm_fetch/index.html b/examples/wasm_fetch/index.html
new file mode 100644
index 0000000..beb2dfb
--- /dev/null
+++ b/examples/wasm_fetch/index.html
@@ -0,0 +1,53 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta content="text/html;charset=utf-8" http-equiv="Content-Type"/>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous"
+          integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3">
+</head>
+<body>
+<div class="container-sm" style="max-width: 720px;">
+    <p>
+    </p>
+
+    <form class="row g-3" onsubmit="go(); return false" id="es_form">
+        <div class="col-12">
+            <label for="input_url" class="form-label">Elasticsearch URL</label>
+            <input type="text" class="form-control" id="input_url">
+        </div>
+        <div class="col-6">
+            <label for="input_login" class="form-label">Login</label>
+            <input type="text" class="form-control" id="input_login">
+        </div>
+        <div class="col-6">
+            <label for="input_password" class="form-label">Password</label>
+            <input type="password" class="form-control" id="input_password">
+        </div>
+        <div class="col-12">
+            <button type="submit" class="btn btn-primary">Go!</button>
+        </div>
+        <div id="result_text"></div>
+    </form>
+</div>
+<!-- Note the usage of `type=module` here as this is an ES6 module -->
+<script type="module">
+    // Use ES module import syntax to import functionality from the module
+    // that we have compiled.
+    //
+    // Note that the `default` import is an initialization function which
+    // will "boot" the module and make it ready to use. Currently browsers
+    // don't support natively imported WebAssembly as an ES module, but
+    // eventually the manual initialization won't be required!
+    import init, {call_es} from './pkg/example_wasm_fetch.js';
+
+    await init();
+
+    document.getElementById("es_form").onsubmit = async function(event) {
+        event.preventDefault();
+        const version = await call_es(es_form.input_url.value, es_form.input_login.value, es_form.input_password.value);
+        document.getElementById("result_text").innerText = version;
+    }
+</script>
+
+</body>
+</html>
diff --git a/examples/wasm_fetch/src/lib.rs b/examples/wasm_fetch/src/lib.rs
new file mode 100644
index 0000000..199b8e5
--- /dev/null
+++ b/examples/wasm_fetch/src/lib.rs
@@ -0,0 +1,63 @@
+use wasm_bindgen::prelude::*;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+pub struct VersionInfo {
+    pub number: String,
+    pub build_date: String,
+    pub build_hash: String,
+    pub build_snapshot: bool
+}
+
+#[derive(Deserialize)]
+pub struct InfoResponse {
+    pub name: String,
+    pub cluster_name: String,
+    pub version: VersionInfo,
+    pub tagline: String,
+}
+
+#[wasm_bindgen]
+pub async fn call_es(url: String, login: String, password: String) -> Result<JsValue, JsError> {
+    set_panic_hook();
+
+    web_sys::console::log_1(&"starting".into());
+
+    let url = url::Url::parse(&url)?;
+    let pool = elasticsearch::http::transport::SingleNodeConnectionPool::new(url);
+    let mut transport = elasticsearch::http::transport::TransportBuilder::new(pool);
+
+    if !login.is_empty() {
+        let credentials = elasticsearch::auth::Credentials::Basic(login.into(), password.into());
+        transport = transport.auth(credentials)
+    }
+
+    let transport = transport.build()?;
+    let client = elasticsearch::Elasticsearch::new(transport);
+
+    let response = client.info().send().await?;
+
+    let product_header: &str = response.headers()
+        .get("X-Elastic-Product")
+        .map(|h| h.to_str().unwrap())
+        .unwrap_or("missing product header");
+
+    web_sys::console::log_1(&JsValue::from_str(product_header));
+
+    let info = response.json::<InfoResponse>().await?;
+
+    let result = format!("version: {}, build date: {}", info.version.number, info.version.build_date);
+
+    Ok((&result).into())
+}
+
+pub fn set_panic_hook() {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}