diff --git a/Cargo.lock b/Cargo.lock
index 5ce9de9b3a..ee30dd9d23 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,7 +8,7 @@ version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
 dependencies = [
- "gimli",
+ "gimli 0.28.0",
 ]
 
 [[package]]
@@ -17,6 +17,18 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
+[[package]]
+name = "ahash"
+version = "0.8.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a15f179cd60c4584b8a8c596927aadc462e27f2ca70c04e0071964a73ba7a75"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.0.4"
@@ -316,9 +328,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.4.0"
+version = "2.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
+checksum = "2261d10cca569e4643e526d8dc2e62e433cc8aba21ab764233731f8d369bf394"
 
 [[package]]
 name = "blocking"
@@ -618,6 +630,12 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "fallible-iterator"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
+
 [[package]]
 name = "fastrand"
 version = "2.3.0"
@@ -749,6 +767,17 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "gimli"
+version = "0.26.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22030e2c5a68ec659fde1e949a745124b48e6fa8b045b7ed5bd1fe4ccc5c4e5d"
+dependencies = [
+ "fallible-iterator",
+ "indexmap 1.9.3",
+ "stable_deref_trait",
+]
+
 [[package]]
 name = "gimli"
 version = "0.28.0"
@@ -790,6 +819,22 @@ version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eabb4a44450da02c90444cf74558da904edde8fb4e9035a9a6a4e15445af0bd7"
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "hashbrown"
+version = "0.14.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
+dependencies = [
+ "ahash",
+ "serde",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.15.2"
@@ -825,6 +870,12 @@ dependencies = [
  "itoa",
 ]
 
+[[package]]
+name = "id-arena"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25a2bc672d1148e28034f176e01fffebb08b35768468cc954630da77a1449005"
+
 [[package]]
 name = "idna"
 version = "0.4.0"
@@ -835,6 +886,16 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.9.0"
@@ -842,7 +903,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.15.2",
  "serde",
 ]
 
@@ -912,6 +973,12 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "leb128"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "884e2677b40cc8c339eaefcb701c32ef1fd2493d71118dc0ca4b6a736c93bd67"
+
 [[package]]
 name = "libc"
 version = "0.2.172"
@@ -1108,9 +1175,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.36"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
 dependencies = [
  "proc-macro2",
 ]
@@ -1193,7 +1260,7 @@ version = "0.38.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fdb5bc1ae2baa591800df16c9ca78619bf65c0488b41b96ccec5d11220d8c154"
 dependencies = [
- "bitflags 2.4.0",
+ "bitflags 2.9.4",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -1318,6 +1385,12 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b7c388c1b5e93756d0c740965c41e8822f866621d41acbdf6336a6a168f8840c"
 
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
@@ -1484,7 +1557,7 @@ version = "0.22.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
 dependencies = [
- "indexmap",
+ "indexmap 2.9.0",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -2057,7 +2130,7 @@ dependencies = [
  "glob",
  "goblin",
  "heck",
- "indexmap",
+ "indexmap 2.9.0",
  "once_cell",
  "serde",
  "tempfile",
@@ -2068,6 +2141,7 @@ dependencies = [
  "uniffi_pipeline",
  "uniffi_testing",
  "uniffi_udl",
+ "walrus",
 ]
 
 [[package]]
@@ -2095,7 +2169,7 @@ name = "uniffi_internal_macros"
 version = "0.29.4"
 dependencies = [
  "anyhow",
- "indexmap",
+ "indexmap 2.9.0",
  "proc-macro2",
  "quote",
  "syn",
@@ -2133,7 +2207,7 @@ version = "0.29.4"
 dependencies = [
  "anyhow",
  "heck",
- "indexmap",
+ "indexmap 2.9.0",
  "tempfile",
  "uniffi_internal_macros",
 ]
@@ -2192,6 +2266,12 @@ version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d92ccd67fb88503048c01b59152a04effd0782d035a83a6d256ce6085f08f4a3"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "waker-fn"
 version = "1.1.0"
@@ -2208,6 +2288,34 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "walrus"
+version = "0.23.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6481311b98508f4bc2d0abbfa5d42172e7a54b4b24d8f15e28b0dc650be0c59f"
+dependencies = [
+ "anyhow",
+ "gimli 0.26.2",
+ "id-arena",
+ "leb128",
+ "log",
+ "walrus-macro",
+ "wasm-encoder",
+ "wasmparser",
+]
+
+[[package]]
+name = "walrus-macro"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ad39ff894c43c9649fa724cdde9a6fc50b855d517ef071a93e5df82fe51d3"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.100"
@@ -2278,6 +2386,29 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "wasm-encoder"
+version = "0.214.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff694f02a8d7a50b6922b197ae03883fbf18cdb2ae9fbee7b6148456f5f44041"
+dependencies = [
+ "leb128",
+]
+
+[[package]]
+name = "wasmparser"
+version = "0.214.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5309c1090e3e84dad0d382f42064e9933fdaedb87e468cc239f0eabea73ddcb6"
+dependencies = [
+ "ahash",
+ "bitflags 2.9.4",
+ "hashbrown 0.14.5",
+ "indexmap 2.9.0",
+ "semver",
+ "serde",
+]
+
 [[package]]
 name = "web-sys"
 version = "0.3.64"
@@ -2483,3 +2614,23 @@ checksum = "21a0236b59786fed61e2a80582dd500fe61f18b5dca67a4a067d0bc9039339cf"
 dependencies = [
  "memchr",
 ]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1039dd0d3c310cf05de012d8a39ff557cb0d23087fd44cad61df08fc31907a2f"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/uniffi_bindgen/Cargo.toml b/uniffi_bindgen/Cargo.toml
index dfa9a893b3..995be31225 100644
--- a/uniffi_bindgen/Cargo.toml
+++ b/uniffi_bindgen/Cargo.toml
@@ -38,6 +38,7 @@ uniffi_udl = { path = "../uniffi_udl", version = "=0.29.4" }
 # Don't include the `unicode-linebreak` or `unicode-width` since that functionality isn't needed for
 # docstrings.
 textwrap = { version = "0.16", features=["smawk"], default-features = false }
+walrus = "0.23"
 
 [package.metadata.docs.rs]
 rustdoc-args = ["--generate-link-to-definition"]
diff --git a/uniffi_bindgen/src/library_mode.rs b/uniffi_bindgen/src/library_mode.rs
index 4b09b4aa9c..90090471c8 100644
--- a/uniffi_bindgen/src/library_mode.rs
+++ b/uniffi_bindgen/src/library_mode.rs
@@ -89,7 +89,7 @@ pub fn generate_bindings<T: BindingGenerator>(
 
 // If `library_path` is a C dynamic library, return its name
 pub fn calc_cdylib_name(library_path: &Utf8Path) -> Option<&str> {
-    let cdylib_extensions = [".so", ".dll", ".dylib"];
+    let cdylib_extensions = [".so", ".dll", ".dylib", ".wasm"];
     let filename = library_path.file_name()?;
     let filename = filename.strip_prefix("lib").unwrap_or(filename);
     for ext in cdylib_extensions {
diff --git a/uniffi_bindgen/src/macro_metadata/extract.rs b/uniffi_bindgen/src/macro_metadata/extract.rs
index 98ba669b06..d6f44a7d44 100644
--- a/uniffi_bindgen/src/macro_metadata/extract.rs
+++ b/uniffi_bindgen/src/macro_metadata/extract.rs
@@ -14,6 +14,7 @@ use goblin::{
 };
 use std::collections::HashSet;
 use uniffi_meta::Metadata;
+use walrus::{ir::Value, ConstExpr, DataKind, ExportItem, GlobalId, GlobalKind, Module};
 
 /// Extract metadata written by the `uniffi::export` macro from a library file
 ///
@@ -31,7 +32,10 @@ fn extract_from_bytes(file_data: &[u8]) -> anyhow::Result<Vec<Metadata>> {
         Object::Mach(mach) => extract_from_mach(mach, file_data),
         Object::Archive(archive) => extract_from_archive(archive, file_data),
         Object::COFF(coff) => extract_from_coff(coff, file_data),
-        _ => bail!("Unknown library format"),
+        _ => match Module::from_buffer(file_data) {
+            Ok(module) => extract_from_wasm(&module),
+            Err(_) => bail!("Unknown library format"),
+        },
     }
 }
 
@@ -232,6 +236,75 @@ pub fn extract_from_coff(coff: Coff<'_>, file_data: &[u8]) -> anyhow::Result<Vec
     Ok(extracted.into_metadata())
 }
 
+pub fn extract_from_wasm(module: &Module) -> anyhow::Result<Vec<Metadata>> {
+    fn get_global_positive_usize(module: &Module, global_id: GlobalId) -> Option<usize> {
+        let global = module.globals.get(global_id);
+        let GlobalKind::Local(const_expr) = &global.kind else {
+            return None;
+        };
+        get_const_expr_positive_usize(module, const_expr)
+    }
+
+    fn get_const_expr_positive_usize(module: &Module, const_expr: &ConstExpr) -> Option<usize> {
+        match const_expr {
+            ConstExpr::Value(value) => match value {
+                Value::I32(i32) => usize::try_from(*i32).ok(),
+                Value::I64(i64) => usize::try_from(*i64).ok(),
+                _ => None,
+            },
+            ConstExpr::Global(id) => get_global_positive_usize(module, *id),
+            _ => None,
+        }
+    }
+
+    let mut extracted = ExtractedItems::new();
+
+    for export in module.exports.iter() {
+        if !is_metadata_symbol(&export.name) {
+            continue;
+        }
+        let ExportItem::Global(global_id) = &export.item else {
+            continue;
+        };
+        // The exported global contains a pointer value to the data in memory 0.
+        let Some(address) = get_global_positive_usize(module, *global_id) else {
+            continue;
+        };
+        // An active data segment contains a memory ID (0 if not specified) and a byte array.
+        // When the WASM module is initialized, the designated range of the memory is initialized
+        // with this byte array data.
+        for data in module.data.iter() {
+            // A WASM module built with Rust usually stores global variable data in memory 0;
+            // i.e., given a Rust module, `memory` should be 0 here.
+            let DataKind::Active {
+                offset: data_offset,
+                // memory,
+                ..
+            } = &data.kind
+            else {
+                continue;
+            };
+            let Some(data_offset) = get_const_expr_positive_usize(module, data_offset) else {
+                continue;
+            };
+            if !(data_offset..data_offset + data.value.len()).contains(&address) {
+                continue;
+            }
+            // We have found the data segment that contains the UniFFI metadata.
+            extracted.extract_item(
+                &export.name,
+                &data.value,
+                address
+                    .checked_sub(data_offset)
+                    .context("Error getting global data offset")?,
+            )?;
+            break;
+        }
+    }
+
+    Ok(extracted.into_metadata())
+}
+
 /// Container for extracted metadata items
 #[derive(Default)]
 struct ExtractedItems {