diff --git a/warzone/crates/warzone-server/src/routes/web.rs b/warzone/crates/warzone-server/src/routes/web.rs
index 140e754..7692323 100644
--- a/warzone/crates/warzone-server/src/routes/web.rs
+++ b/warzone/crates/warzone-server/src/routes/web.rs
@@ -144,7 +144,7 @@ const WEB_HTML: &str = r##"<!DOCTYPE html>
 </div>
 
 <script type="module">
-import init, { WasmIdentity, WasmSession, decrypt_wire_message } from '/wasm/warzone_wasm.js';
+import init, { WasmIdentity, WasmSession, decrypt_wire_message, self_test, debug_bundle_info } from '/wasm/warzone_wasm.js';
 
 const SERVER = window.location.origin;
 const $messages = document.getElementById('messages');
@@ -581,6 +581,20 @@ async function doSend() {
     addSys('SPK secret: ' + (mySpkSecretHex ? mySpkSecretHex.slice(0,16) + '...' : 'NONE'));
     return;
   }
+  if (text === '/selftest') {
+    try {
+      const r = self_test();
+      addSys(r);
+    } catch(e) { addSys('Self-test FAILED: ' + e); }
+    return;
+  }
+  if (text === '/bundleinfo') {
+    try {
+      const r = debug_bundle_info(wasmIdentity);
+      addSys(r);
+    } catch(e) { addSys('Bundle info error: ' + e); }
+    return;
+  }
   if (text === '/quit') { window.close(); return; }
   if (text === '/glist') { await groupList(); return; }
   if (text === '/dm') { currentGroup = null; addSys('Switched to DM mode'); $peerInput.value = localStorage.getItem('wz-peer') || ''; return; }
diff --git a/warzone/crates/warzone-wasm/src/lib.rs b/warzone/crates/warzone-wasm/src/lib.rs
index 87ecb06..8c11482 100644
--- a/warzone/crates/warzone-wasm/src/lib.rs
+++ b/warzone/crates/warzone-wasm/src/lib.rs
@@ -200,8 +200,95 @@ impl WasmSession {
     }
 }
 
+// ── Self-test (verifies full encrypt/decrypt cycle within WASM) ──
+
+#[wasm_bindgen]
+pub fn self_test() -> Result<String, JsValue> {
+    // Alice
+    let alice_seed = Seed::generate();
+    let alice_id = alice_seed.derive_identity();
+    let alice_pub = alice_id.public_identity();
+
+    // Bob
+    let bob_seed = Seed::generate();
+    let bob_id = bob_seed.derive_identity();
+    let bob_pub = bob_id.public_identity();
+
+    // Bob's pre-key bundle
+    let (bob_spk_secret, bob_spk) = generate_signed_pre_key(&bob_id, 1);
+    let bob_otpks = generate_one_time_pre_keys(0, 5);
+    let bob_bundle = PreKeyBundle {
+        identity_key: *bob_pub.signing.as_bytes(),
+        identity_encryption_key: *bob_pub.encryption.as_bytes(),
+        signed_pre_key: bob_spk,
+        one_time_pre_key: Some(OneTimePreKeyPublic {
+            id: bob_otpks[0].id,
+            public_key: *bob_otpks[0].public.as_bytes(),
+        }),
+    };
+    let bob_bundle_bytes = bincode::serialize(&bob_bundle)
+        .map_err(|e| JsValue::from_str(&e.to_string()))?;
+
+    // Alice initiates X3DH and encrypts
+    let x3dh_result = x3dh::initiate(&alice_id, &bob_bundle)
+        .map_err(|e| JsValue::from_str(&format!("X3DH initiate: {}", e)))?;
+    let their_spk = PublicKey::from(bob_bundle.signed_pre_key.public_key);
+    let mut alice_ratchet = RatchetState::init_alice(x3dh_result.shared_secret, their_spk);
+    let encrypted = alice_ratchet.encrypt(b"hello from WASM self-test")
+        .map_err(|e| JsValue::from_str(&format!("encrypt: {}", e)))?;
+
+    let wire = WireMessage::KeyExchange {
+        sender_fingerprint: alice_pub.fingerprint.to_string(),
+        sender_identity_encryption_key: *alice_pub.encryption.as_bytes(),
+        ephemeral_public: *x3dh_result.ephemeral_public.as_bytes(),
+        used_one_time_pre_key_id: x3dh_result.used_one_time_pre_key_id,
+        ratchet_message: encrypted,
+    };
+    let wire_bytes = bincode::serialize(&wire)
+        .map_err(|e| JsValue::from_str(&e.to_string()))?;
+
+    // Bob decrypts using decrypt_wire_message
+    let bob_spk_hex = hex::encode(bob_spk_secret.to_bytes());
+    let bob_seed_hex = hex::encode(bob_seed.0);
+
+    let result_str = decrypt_wire_message(&bob_seed_hex, &bob_spk_hex, &wire_bytes, None)?;
+    let result: serde_json::Value = serde_json::from_str(&result_str)
+        .map_err(|e| JsValue::from_str(&e.to_string()))?;
+
+    let text = result.get("text").and_then(|v| v.as_str()).unwrap_or("MISSING");
+
+    Ok(format!(
+        "WASM self-test: alice_fp={}, bob_fp={}, wire_bytes={}, decrypted='{}', PASS={}",
+        alice_pub.fingerprint, bob_pub.fingerprint, wire_bytes.len(), text,
+        text == "hello from WASM self-test"
+    ))
+}
+
 // ── Decrypt ──
 
+/// Debug: dump what the WASM identity's bundle looks like (for comparing with CLI).
+#[wasm_bindgen]
+pub fn debug_bundle_info(identity: &mut WasmIdentity) -> Result<String, JsValue> {
+    let bundle_bytes = identity.bundle_bytes()?;
+    let bundle: PreKeyBundle = bincode::deserialize(&bundle_bytes)
+        .map_err(|e| JsValue::from_str(&e.to_string()))?;
+
+    let spk_pub_hex = hex::encode(bundle.signed_pre_key.public_key);
+    let ik_hex = hex::encode(bundle.identity_key);
+    let iek_hex = hex::encode(bundle.identity_encryption_key);
+    let spk_secret_hex = identity.spk_secret_hex();
+
+    // Verify SPK matches
+    let spk_secret = x25519_dalek::StaticSecret::from(identity.spk_secret_bytes);
+    let derived_pub = PublicKey::from(&spk_secret);
+    let matches = *derived_pub.as_bytes() == bundle.signed_pre_key.public_key;
+
+    Ok(format!(
+        "bundle_size={}, ik={}, iek={}, spk_pub={}, spk_secret={}, spk_matches={}",
+        bundle_bytes.len(), &ik_hex[..16], &iek_hex[..16], &spk_pub_hex[..16], &spk_secret_hex[..16], matches
+    ))
+}
+
 /// Decrypt a bincode WireMessage. `spk_secret_hex` is the signed pre-key secret
 /// (stored in localStorage, generated during identity creation).
 /// Returns JSON: { "sender": "fp", "text": "...", "new_session": bool, "session_data": "base64..." }
