diff --git a/.gitignore b/.gitignore
index 1ade5a28c..8bea82447 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *.untracked.*
 node-compile-cache/
 
+
 *.cpuprofile
 
 
diff --git a/apps/dashboard/src/app/(main)/(protected)/projects/[projectId]/domains/page-client.tsx b/apps/dashboard/src/app/(main)/(protected)/projects/[projectId]/domains/page-client.tsx
index eeb48166b..035f82c5a 100644
--- a/apps/dashboard/src/app/(main)/(protected)/projects/[projectId]/domains/page-client.tsx
+++ b/apps/dashboard/src/app/(main)/(protected)/projects/[projectId]/domains/page-client.tsx
@@ -3,14 +3,15 @@ import { FormDialog } from "@/components/form-dialog";
 import { InputField, SwitchField } from "@/components/form-fields";
 import { SettingCard, SettingSwitch } from "@/components/settings";
 import { AdminDomainConfig, AdminProject } from "@stackframe/stack";
-import { urlSchema } from "@stackframe/stack-shared/dist/schema-fields";
-import { isValidUrl } from "@stackframe/stack-shared/dist/utils/urls";
+import { createUrlIfValid, isValidUrl } from "@stackframe/stack-shared/dist/utils/urls";
 import { Accordion, AccordionContent, AccordionItem, AccordionTrigger, ActionCell, ActionDialog, Alert, Button, Table, TableBody, TableCell, TableHead, TableHeader, TableRow, Typography } from "@stackframe/stack-ui";
 import React from "react";
 import * as yup from "yup";
 import { PageLayout } from "../page-layout";
 import { useAdminApp } from "../use-admin-app";
 
+const DOMAIN_REGEX = /^(((?!-))(xn--|_)?[a-z0-9-]{0,61}[a-z0-9]{1,1}\.)*(xn--)?([a-z0-9][a-z0-9\-]{0,60}|[a-z0-9-]{1,30}\.[a-z]{2,})$/;
+
 function EditDialog(props: {
   open?: boolean,
   onOpenChange?: (open: boolean) => void,
@@ -30,9 +31,13 @@ function EditDialog(props: {
   }
 )) {
   const domainFormSchema = yup.object({
-    domain: urlSchema
-      .url("Invalid URL")
-      .transform((value) => 'https://' + value)
+    domain: yup.string()
+      .test('is-domain', "Invalid Domain", (domain) => {
+        if (!domain) {
+          return true;
+        }
+        const urlIfValid = createUrlIfValid(`https://${domain}`);
+        return !!urlIfValid && urlIfValid.hostname === domain; })
       .notOneOf(
         props.domains
           .filter((_, i) => (props.type === 'update' && i !== props.editIndex) || props.type === 'create')
@@ -44,6 +49,7 @@ function EditDialog(props: {
       .matches(/^\//, "Handler path must start with /")
       .defined(),
     addWww: yup.boolean(),
+    allowInsecureHttp: yup.boolean(),
   });
 
   const canAddWww = (domain: string | undefined) => {
@@ -70,6 +76,7 @@ function EditDialog(props: {
       addWww: props.type === 'create',
       domain: props.type === 'update' ? props.defaultDomain.replace(/^https:\/\//, "") : undefined,
       handlerPath: props.type === 'update' ? props.defaultHandlerPath : "/handler",
+      allowInsecureHttp: false,
     }}
     onOpenChange={props.onOpenChange}
     trigger={props.trigger}
@@ -83,11 +90,11 @@ function EditDialog(props: {
             domains: [
               ...props.domains,
               {
-                domain: values.domain,
+                domain: (values.allowInsecureHttp ? 'http' : 'https') + `://` + values.domain,
                 handlerPath: values.handlerPath,
               },
-              ...(canAddWww(values.domain.slice(8)) && values.addWww ? [{
-                domain: 'https://www.' + values.domain.slice(8),
+              ...(canAddWww(values.domain) && values.addWww ? [{
+                domain: `${values.allowInsecureHttp ? 'http' : 'https'}://www.` + values.domain,
                 handlerPath: values.handlerPath,
               }] : []),
             ],
@@ -118,7 +125,7 @@ function EditDialog(props: {
           label="Domain"
           name="domain"
           control={form.control}
-          prefixItem='https://'
+          prefixItem={form.getValues('allowInsecureHttp') ? 'http://' : 'https://'}
           placeholder='example.com'
         />
 
@@ -144,6 +151,16 @@ function EditDialog(props: {
               <Typography variant="secondary" type="footnote">
                 only modify this if you changed the default handler path in your app
               </Typography>
+              <div className="my-4">
+                <SwitchField
+                  label="Allow insecure HTTP domains"
+                  name="allowInsecureHttp"
+                  control={form.control}
+                />
+              </div>
+              <Typography variant="secondary" type="footnote">
+                Warning: HTTP domains are insecure and should only be used for development / internal networks.
+              </Typography>
             </AccordionContent>
           </AccordionItem>
         </Accordion>
diff --git a/apps/e2e/tests/backend/endpoints/api/v1/projects.test.ts b/apps/e2e/tests/backend/endpoints/api/v1/projects.test.ts
index ddfb1fe88..dcec6e653 100644
--- a/apps/e2e/tests/backend/endpoints/api/v1/projects.test.ts
+++ b/apps/e2e/tests/backend/endpoints/api/v1/projects.test.ts
@@ -274,6 +274,106 @@ it("is not allowed to have two identical domains", async ({ expect }) => {
   `);
 });
 
+it("should allow insecure HTTP domains", async ({ expect }) => {
+  await Auth.Otp.signIn();
+  const { adminAccessToken } = await Project.createAndGetAdminToken();
+  const { updateProjectResponse: response } = await Project.updateCurrent(adminAccessToken, {
+    config: {
+      domains: [{
+        domain: 'http://insecure-domain.stack-test.example.com',
+        handler_path: '/handler'
+      }]
+    },
+  });
+  expect(response).toMatchInlineSnapshot(`
+    NiceResponse {
+      "status": 200,
+      "body": {
+        "config": {
+          "allow_localhost": true,
+          "client_team_creation_enabled": false,
+          "client_user_deletion_enabled": false,
+          "create_team_on_sign_up": false,
+          "credential_enabled": true,
+          "domains": [
+            {
+              "domain": "http://insecure-domain.stack-test.example.com",
+              "handler_path": "/handler",
+            },
+          ],
+          "email_config": { "type": "shared" },
+          "enabled_oauth_providers": [],
+          "id": "<stripped UUID>",
+          "legacy_global_jwt_signing": false,
+          "magic_link_enabled": false,
+          "oauth_providers": [],
+          "passkey_enabled": false,
+          "sign_up_enabled": true,
+          "team_creator_default_permissions": [{ "id": "admin" }],
+          "team_member_default_permissions": [{ "id": "member" }],
+        },
+        "created_at_millis": <stripped field 'created_at_millis'>,
+        "description": "",
+        "display_name": "New Project",
+        "id": "<stripped UUID>",
+        "is_production_mode": false,
+        "user_count": 0,
+      },
+      "headers": Headers { <some fields may have been hidden> },
+    }
+  `);
+});
+
+it("should not allow protocols other than http(s) in trusted domains", async ({ expect }) => {
+  await Auth.Otp.signIn();
+  const { adminAccessToken } = await Project.createAndGetAdminToken();
+  const { updateProjectResponse: response } = await Project.updateCurrent(adminAccessToken, {
+    config: {
+      domains: [{
+        domain: 'whatever://disallowed-domain.stack-test.example.com',
+        handler_path: '/handler'
+      }]
+    },
+  });
+  expect(response).toMatchInlineSnapshot(`
+    NiceResponse {
+      "status": 200,
+      "body": {
+        "config": {
+          "allow_localhost": true,
+          "client_team_creation_enabled": false,
+          "client_user_deletion_enabled": false,
+          "create_team_on_sign_up": false,
+          "credential_enabled": true,
+          "domains": [
+            {
+              "domain": "whatever://disallowed-domain.stack-test.example.com",
+              "handler_path": "/handler",
+            },
+          ],
+          "email_config": { "type": "shared" },
+          "enabled_oauth_providers": [],
+          "id": "<stripped UUID>",
+          "legacy_global_jwt_signing": false,
+          "magic_link_enabled": false,
+          "oauth_providers": [],
+          "passkey_enabled": false,
+          "sign_up_enabled": true,
+          "team_creator_default_permissions": [{ "id": "admin" }],
+          "team_member_default_permissions": [{ "id": "member" }],
+        },
+        "created_at_millis": <stripped field 'created_at_millis'>,
+        "description": "",
+        "display_name": "New Project",
+        "id": "<stripped UUID>",
+        "is_production_mode": false,
+        "user_count": 0,
+      },
+      "headers": Headers { <some fields may have been hidden> },
+    }
+  `);
+});
+
 it("updates the project email configuration", async ({ expect }) => {
   await Auth.Otp.signIn();
   const { adminAccessToken } = await Project.createAndGetAdminToken();
diff --git a/packages/stack-shared/src/interface/crud/projects.ts b/packages/stack-shared/src/interface/crud/projects.ts
index 511f2bfc1..301dd33fd 100644
--- a/packages/stack-shared/src/interface/crud/projects.ts
+++ b/packages/stack-shared/src/interface/crud/projects.ts
@@ -57,7 +57,8 @@ export const emailConfigSchema = yupObject({
 });
 
 const domainSchema = yupObject({
-  domain: schemaFields.projectTrustedDomainSchema.defined(),
+  domain: schemaFields.urlSchema.defined()
+    .meta({ openapiField: { description: 'URL. Must either start with https:// or', exampleValue: 'https://example.com' } }),
   handler_path: schemaFields.handlerPathSchema.defined(),
 });
 
diff --git a/packages/stack-shared/src/schema-fields.ts b/packages/stack-shared/src/schema-fields.ts
index 4a18dff69..8145e9b63 100644
--- a/packages/stack-shared/src/schema-fields.ts
+++ b/packages/stack-shared/src/schema-fields.ts
@@ -288,7 +288,6 @@ export const emailUsernameSchema = yupString().meta({ openapiField: { descriptio
 export const emailSenderEmailSchema = emailSchema.meta({ openapiField: { description: 'Email sender email. Needs to be specified when using type="standard"', exampleValue: 'example@your-domain.com' } });
 export const emailPasswordSchema = passwordSchema.meta({ openapiField: { description: 'Email password. Needs to be specified when using type="standard"', exampleValue: 'your-email-password' } });
 // Project domain config
-export const projectTrustedDomainSchema = urlSchema.test('is-https', 'Trusted domain must start with https://', (value) => value?.startsWith('https://')).meta({ openapiField: { description: 'Your domain URL. Make sure you own and trust this domain. Needs to start with https://', exampleValue: 'https://example.com' } });
 export const handlerPathSchema = yupString().test('is-handler-path', 'Handler path must start with /', (value) => value?.startsWith('/')).meta({ openapiField: { description: 'Handler path. If you did not setup a custom handler path, it should be "/handler" by default. It needs to start with /', exampleValue: '/handler' } });
 
 // Users