diff --git a/src/browser/tests/blob.html b/src/browser/tests/blob.html
index 12cd13f5..0cbf8ea5 100644
--- a/src/browser/tests/blob.html
+++ b/src/browser/tests/blob.html
@@ -98,6 +98,64 @@
   }
 </script>
 
+<script id=mime_parsing>
+  // MIME types are lowercased
+  {
+    const blob = new Blob([], { type: "TEXT/HTML" });
+    testing.expectEqual("text/html", blob.type);
+  }
+
+  {
+    const blob = new Blob([], { type: "Application/JSON" });
+    testing.expectEqual("application/json", blob.type);
+  }
+
+  // MIME with parameters - lowercased
+  {
+    const blob = new Blob([], { type: "text/html; charset=UTF-8" });
+    testing.expectEqual("text/html; charset=utf-8", blob.type);
+  }
+
+  // Any ASCII string is accepted and lowercased (no MIME structure validation)
+  {
+    const blob = new Blob([], { type: "invalid" });
+    testing.expectEqual("invalid", blob.type);
+  }
+
+  {
+    const blob = new Blob([], { type: "/" });
+    testing.expectEqual("/", blob.type);
+  }
+
+  // Non-ASCII characters cause empty string (chars outside U+0020-U+007E)
+  {
+    const blob = new Blob([], { type: "ý/x" });
+    testing.expectEqual("", blob.type);
+  }
+
+  {
+    const blob = new Blob([], { type: "text/plàin" });
+    testing.expectEqual("", blob.type);
+  }
+
+  // Control characters cause empty string
+  {
+    const blob = new Blob([], { type: "text/html\x00" });
+    testing.expectEqual("", blob.type);
+  }
+
+  // Empty type stays empty
+  {
+    const blob = new Blob([]);
+    testing.expectEqual("", blob.type);
+  }
+
+  {
+    const blob = new Blob([], { type: "" });
+    testing.expectEqual("", blob.type);
+  }
+</script>
+
 <script id=slice>
   {
     const parts = ["la", "symphonie", "des", "éclairs"];
diff --git a/src/browser/tests/net/request.html b/src/browser/tests/net/request.html
index 2a88e83e..b4497e14 100644
--- a/src/browser/tests/net/request.html
+++ b/src/browser/tests/net/request.html
@@ -137,3 +137,79 @@
     testing.expectEqual('PROPFIND', req.method);
   }
 </script>
+
+<script id=body_methods>
+  testing.async(async () => {
+    const req = new Request('https://example.com/api', {
+      method: 'POST',
+      body: 'Hello, World!',
+      headers: { 'Content-Type': 'text/plain' }
+    });
+
+    const text = await req.text();
+    testing.expectEqual('Hello, World!', text);
+  });
+
+  testing.async(async () => {
+    const req = new Request('https://example.com/api', {
+      method: 'POST',
+      body: '{"name": "test"}',
+      headers: { 'Content-Type': 'application/json' }
+    });
+
+    const json = await req.json();
+    testing.expectEqual('test', json.name);
+  });
+
+  testing.async(async () => {
+    const req = new Request('https://example.com/api', {
+      method: 'POST',
+      body: 'binary data',
+      headers: { 'Content-Type': 'application/octet-stream' }
+    });
+
+    const buffer = await req.arrayBuffer();
+    testing.expectEqual(true, buffer instanceof ArrayBuffer);
+    testing.expectEqual(11, buffer.byteLength);
+  });
+
+  testing.async(async () => {
+    const req = new Request('https://example.com/api', {
+      method: 'POST',
+      body: 'blob content',
+      headers: { 'Content-Type': 'text/plain' }
+    });
+
+    const blob = await req.blob();
+    testing.expectEqual(true, blob instanceof Blob);
+    testing.expectEqual(12, blob.size);
+    testing.expectEqual('text/plain', blob.type);
+  });
+
+  testing.async(async () => {
+    const req = new Request('https://example.com/api', {
+      method: 'POST',
+      body: 'bytes'
+    });
+
+    const bytes = await req.bytes();
+    testing.expectEqual(true, bytes instanceof Uint8Array);
+    testing.expectEqual(5, bytes.length);
+  });
+</script>
+
+<script id=clone>
+  {
+    const req1 = new Request('https://example.com/api', {
+      method: 'POST',
+      body: 'test body',
+      headers: { 'X-Custom': 'value' }
+    });
+
+    const req2 = req1.clone();
+
+    testing.expectEqual(req1.url, req2.url);
+    testing.expectEqual(req1.method, req2.method);
+    testing.expectEqual('value', req2.headers.get('X-Custom'));
+  }
+</script>
diff --git a/src/browser/tests/net/response.html b/src/browser/tests/net/response.html
index b7c149ba..3b74e72c 100644
--- a/src/browser/tests/net/response.html
+++ b/src/browser/tests/net/response.html
@@ -2,51 +2,113 @@
 <script src="../testing.js"></script>
 
 <script id=response>
-  // let response = new Response("Hello, World!");
-  // testing.expectEqual(200, response.status);
-  // testing.expectEqual("", response.statusText);
-  // testing.expectEqual(true, response.ok);
-  // testing.expectEqual("", response.url);
-  // testing.expectEqual(false, response.redirected);
+  {
+    let response = new Response("Hello, World!");
+    testing.expectEqual(200, response.status);
+    testing.expectEqual("", response.statusText);
+    testing.expectEqual(true, response.ok);
+    testing.expectEqual("", response.url);
+    testing.expectEqual(false, response.redirected);
+  }
 
-  let response2 = new Response("Error occurred", {
-    status: 404,
-    statusText: "Not Found",
-    headers: {
-        "Content-Type": "text/plain",
-        "X-Custom": "test-value",
-        "Cache-Control": "no-cache"
-    }
-  });
-  testing.expectEqual(true, true);
-  // testing.expectEqual(404, response2.status);
-  // testing.expectEqual("Not Found", response2.statusText);
-  // testing.expectEqual(false, response2.ok);
-  // testing.expectEqual("text/plain", response2.headers);
-  // testing.expectEqual("test-value", response2.headers.get("X-Custom"));
-  testing.expectEqual("no-cache", response2.headers.get("cache-control"));
-
-  // let response3 = new Response("Created", { status: 201, statusText: "Created" });
-  // testing.expectEqual("basic", response3.type);
-  // testing.expectEqual(201, response3.status);
-  // testing.expectEqual("Created", response3.statusText);
-  // testing.expectEqual(true, response3.ok);
-
-  // let nullResponse = new Response(null);
-  // testing.expectEqual(200, nullResponse.status);
-  // testing.expectEqual("", nullResponse.statusText);
-
-  // let emptyResponse = new Response("");
-  // testing.expectEqual(200, emptyResponse.status);
-</script>
-
-<!-- <script id=json>
-  testing.async(async () => {
-    const json = await new Promise((resolve) => {
-      let response = new Response('[]');
-      response.json().then(resolve)
+  {
+    let response2 = new Response("Error occurred", {
+      status: 404,
+      statusText: "Not Found",
+      headers: {
+          "Content-Type": "text/plain",
+          "X-Custom": "test-value",
+          "Cache-Control": "no-cache"
+      }
     });
-    testing.expectEqual([], json);
+    testing.expectEqual(404, response2.status);
+    testing.expectEqual("Not Found", response2.statusText);
+    testing.expectEqual(false, response2.ok);
+    testing.expectEqual("test-value", response2.headers.get("X-Custom"));
+    testing.expectEqual("no-cache", response2.headers.get("cache-control"));
+  }
+
+  {
+    let response3 = new Response("Created", { status: 201, statusText: "Created" });
+    testing.expectEqual("basic", response3.type);
+    testing.expectEqual(201, response3.status);
+    testing.expectEqual("Created", response3.statusText);
+    testing.expectEqual(true, response3.ok);
+  }
+
+  {
+    let nullResponse = new Response(null);
+    testing.expectEqual(200, nullResponse.status);
+    testing.expectEqual("", nullResponse.statusText);
+  }
+
+  {
+    let emptyResponse = new Response("");
+    testing.expectEqual(200, emptyResponse.status);
+  }
+</script>
+
+<script id=body_methods>
+  testing.async(async () => {
+    const response = new Response('Hello, World!');
+    const text = await response.text();
+    testing.expectEqual('Hello, World!', text);
+  });
+
+  testing.async(async () => {
+    const response = new Response('{"name": "test"}');
+    const json = await response.json();
+    testing.expectEqual('test', json.name);
+  });
+
+  testing.async(async () => {
+    const response = new Response('binary data');
+    const buffer = await response.arrayBuffer();
+    testing.expectEqual(true, buffer instanceof ArrayBuffer);
+    testing.expectEqual(11, buffer.byteLength);
+  });
+
+  testing.async(async () => {
+    const response = new Response('blob content', {
+      headers: { 'Content-Type': 'text/plain' }
+    });
+    const blob = await response.blob();
+    testing.expectEqual(true, blob instanceof Blob);
+    testing.expectEqual(12, blob.size);
+    testing.expectEqual('text/plain', blob.type);
+  });
+
+  testing.async(async () => {
+    const response = new Response('bytes');
+    const bytes = await response.bytes();
+    testing.expectEqual(true, bytes instanceof Uint8Array);
+    testing.expectEqual(5, bytes.length);
+  });
+</script>
+
+<script id=clone>
+  {
+    const response1 = new Response('test body', {
+      status: 201,
+      statusText: 'Created',
+      headers: { 'X-Custom': 'value' }
+    });
+
+    const response2 = response1.clone();
+
+    testing.expectEqual(response1.status, response2.status);
+    testing.expectEqual(response1.statusText, response2.statusText);
+    testing.expectEqual('value', response2.headers.get('X-Custom'));
+  }
+
+  testing.async(async () => {
+    const response1 = new Response('cloned body');
+    const response2 = response1.clone();
+
+    const text1 = await response1.text();
+    const text2 = await response2.text();
+
+    testing.expectEqual('cloned body', text1);
+    testing.expectEqual('cloned body', text2);
   });
 </script>
- -->
diff --git a/src/browser/webapi/Blob.zig b/src/browser/webapi/Blob.zig
index ac31560a..aa955ce5 100644
--- a/src/browser/webapi/Blob.zig
+++ b/src/browser/webapi/Blob.zig
@@ -21,6 +21,7 @@ const Writer = std.Io.Writer;
 
 const js = @import("../js/js.zig");
 const Page = @import("../Page.zig");
+const Mime = @import("../Mime.zig");
 
 /// https://w3c.github.io/FileAPI/#blob-section
 /// https://developer.mozilla.org/en-US/docs/Web/API/Blob
@@ -50,21 +51,50 @@ const InitOptions = struct {
     endings: []const u8 = "transparent",
 };
 
-/// Creates a new Blob.
+/// Creates a new Blob (JS constructor).
 pub fn init(
     maybe_blob_parts: ?[]const []const u8,
     maybe_options: ?InitOptions,
     page: *Page,
+) !*Blob {
+    return initWithMimeValidation(maybe_blob_parts, maybe_options, false, page);
+}
+
+/// Creates a new Blob with optional MIME validation.
+/// When validate_mime is true, uses full MIME parsing (for Response/Request).
+/// When false, uses simple ASCII validation per FileAPI spec (for Blob constructor).
+pub fn initWithMimeValidation(
+    maybe_blob_parts: ?[]const []const u8,
+    maybe_options: ?InitOptions,
+    validate_mime: bool,
+    page: *Page,
 ) !*Blob {
     const options: InitOptions = maybe_options orelse .{};
-    // Setup MIME; This can be any string according to my observations.
+
     const mime: []const u8 = blk: {
         const t = options.type;
         if (t.len == 0) {
             break :blk "";
         }
 
-        break :blk try page.arena.dupe(u8, t);
+        const buf = try page.arena.dupe(u8, t);
+
+        if (validate_mime) {
+            // Full MIME parsing per MIME sniff spec (for Content-Type headers)
+            _ = Mime.parse(buf) catch break :blk "";
+        } else {
+            // Simple validation per FileAPI spec (for Blob constructor):
+            // - If any char is outside U+0020-U+007E, return empty string
+            // - Otherwise lowercase
+            for (t) |c| {
+                if (c < 0x20 or c > 0x7E) {
+                    break :blk "";
+                }
+            }
+            _ = std.ascii.lowerString(buf, buf);
+        }
+
+        break :blk buf;
     };
 
     const data = blk: {
diff --git a/src/browser/webapi/net/Request.zig b/src/browser/webapi/net/Request.zig
index 4316ddbb..aa7e0dd7 100644
--- a/src/browser/webapi/net/Request.zig
+++ b/src/browser/webapi/net/Request.zig
@@ -24,6 +24,7 @@ const Http = @import("../../../http/Http.zig");
 const URL = @import("../URL.zig");
 const Page = @import("../../Page.zig");
 const Headers = @import("Headers.zig");
+const Blob = @import("../Blob.zig");
 const Allocator = std.mem.Allocator;
 
 const Request = @This();
@@ -153,6 +154,55 @@ pub fn getHeaders(self: *Request, page: *Page) !*Headers {
     return headers;
 }
 
+pub fn blob(self: *Request, page: *Page) !js.Promise {
+    const body = self._body orelse "";
+    const headers = try self.getHeaders(page);
+    const content_type = try headers.get("content-type", page) orelse "";
+
+    const b = try Blob.initWithMimeValidation(
+        &.{body},
+        .{ .type = content_type },
+        true,
+        page,
+    );
+
+    return page.js.local.?.resolvePromise(b);
+}
+
+pub fn text(self: *const Request, page: *Page) !js.Promise {
+    const body = self._body orelse "";
+    return page.js.local.?.resolvePromise(body);
+}
+
+pub fn json(self: *const Request, page: *Page) !js.Promise {
+    const body = self._body orelse "";
+    const local = page.js.local.?;
+    const value = local.parseJSON(body) catch |err| {
+        return local.rejectPromise(.{@errorName(err)});
+    };
+    return local.resolvePromise(try value.persist());
+}
+
+pub fn arrayBuffer(self: *const Request, page: *Page) !js.Promise {
+    return page.js.local.?.resolvePromise(js.ArrayBuffer{ .values = self._body orelse "" });
+}
+
+pub fn bytes(self: *const Request, page: *Page) !js.Promise {
+    return page.js.local.?.resolvePromise(js.TypedArray(u8){ .values = self._body orelse "" });
+}
+
+pub fn clone(self: *const Request, page: *Page) !*Request {
+    return page._factory.create(Request{
+        ._url = self._url,
+        ._arena = self._arena,
+        ._method = self._method,
+        ._headers = self._headers,
+        ._cache = self._cache,
+        ._credentials = self._credentials,
+        ._body = self._body,
+    });
+}
+
 pub const JsApi = struct {
     pub const bridge = js.Bridge(Request);
 
@@ -168,6 +218,12 @@ pub const JsApi = struct {
     pub const headers = bridge.accessor(Request.getHeaders, null, .{});
     pub const cache = bridge.accessor(Request.getCache, null, .{});
     pub const credentials = bridge.accessor(Request.getCredentials, null, .{});
+    pub const blob = bridge.function(Request.blob, .{});
+    pub const text = bridge.function(Request.text, .{});
+    pub const json = bridge.function(Request.json, .{});
+    pub const arrayBuffer = bridge.function(Request.arrayBuffer, .{});
+    pub const bytes = bridge.function(Request.bytes, .{});
+    pub const clone = bridge.function(Request.clone, .{});
 };
 
 const testing = @import("../../../testing.zig");
diff --git a/src/browser/webapi/net/Response.zig b/src/browser/webapi/net/Response.zig
index ba1a754d..d2c270ce 100644
--- a/src/browser/webapi/net/Response.zig
+++ b/src/browser/webapi/net/Response.zig
@@ -23,6 +23,7 @@ const Http = @import("../../../http/Http.zig");
 const Page = @import("../../Page.zig");
 const Headers = @import("Headers.zig");
 const ReadableStream = @import("../streams/ReadableStream.zig");
+const Blob = @import("../Blob.zig");
 
 const Allocator = std.mem.Allocator;
 
@@ -147,6 +148,47 @@ pub fn arrayBuffer(self: *const Response, page: *Page) !js.Promise {
     return page.js.local.?.resolvePromise(js.ArrayBuffer{ .values = self._body orelse "" });
 }
 
+pub fn blob(self: *const Response, page: *Page) !js.Promise {
+    const body = self._body orelse "";
+    const content_type = try self._headers.get("content-type", page) orelse "";
+
+    const b = try Blob.initWithMimeValidation(
+        &.{body},
+        .{ .type = content_type },
+        true,
+        page,
+    );
+
+    return page.js.local.?.resolvePromise(b);
+}
+
+pub fn bytes(self: *const Response, page: *Page) !js.Promise {
+    return page.js.local.?.resolvePromise(js.TypedArray(u8){ .values = self._body orelse "" });
+}
+
+pub fn clone(self: *const Response, page: *Page) !*Response {
+    const arena = try page.getArena(.{ .debug = "Response.clone" });
+    errdefer page.releaseArena(arena);
+
+    const body = if (self._body) |b| try arena.dupe(u8, b) else null;
+    const status_text = try arena.dupe(u8, self._status_text);
+    const url = try arena.dupeZ(u8, self._url);
+
+    const cloned = try arena.create(Response);
+    cloned.* = .{
+        ._arena = arena,
+        ._status = self._status,
+        ._status_text = status_text,
+        ._url = url,
+        ._body = body,
+        ._type = self._type,
+        ._is_redirected = self._is_redirected,
+        ._headers = try Headers.init(.{ .obj = self._headers }, page),
+        ._transfer = null,
+    };
+    return cloned;
+}
+
 pub const JsApi = struct {
     pub const bridge = js.Bridge(Response);
 
@@ -170,6 +212,9 @@ pub const JsApi = struct {
     pub const url = bridge.accessor(Response.getURL, null, .{});
     pub const redirected = bridge.accessor(Response.isRedirected, null, .{});
     pub const arrayBuffer = bridge.function(Response.arrayBuffer, .{});
+    pub const blob = bridge.function(Response.blob, .{});
+    pub const bytes = bridge.function(Response.bytes, .{});
+    pub const clone = bridge.function(Response.clone, .{});
 };
 
 const testing = @import("../../../testing.zig");