diff --git a/api/controllers/console/app/workflow.py b/api/controllers/console/app/workflow.py
index d3c2e681a0..c9953a0962 100644
--- a/api/controllers/console/app/workflow.py
+++ b/api/controllers/console/app/workflow.py
@@ -1,7 +1,7 @@
 import json
 import logging
 from collections.abc import Sequence
-from typing import Any
+from typing import Any, Literal
 
 from flask import abort, request
 from flask_restx import Resource, fields, marshal_with
@@ -45,7 +45,7 @@ from libs.helper import TimestampField, uuid_value
 from libs.login import current_account_with_tenant, login_required
 from models import App
 from models.model import AppMode
-from models.workflow import Workflow
+from models.workflow import Workflow, WorkflowType
 from services.app_generate_service import AppGenerateService
 from services.errors.app import IsDraftWorkflowError, WorkflowHashNotEqualError, WorkflowNotFoundError
 from services.errors.llm import InvokeRateLimitError
@@ -165,6 +165,10 @@ class WorkflowUpdatePayload(BaseModel):
     marked_comment: str | None = Field(default=None, max_length=100)
 
 
+class WorkflowTypeConvertQuery(BaseModel):
+    target_type: Literal["workflow", "evaluation"]
+
+
 class DraftWorkflowTriggerRunPayload(BaseModel):
     node_id: str
 
@@ -188,6 +192,7 @@ reg(DefaultBlockConfigQuery)
 reg(ConvertToWorkflowPayload)
 reg(WorkflowListQuery)
 reg(WorkflowUpdatePayload)
+reg(WorkflowTypeConvertQuery)
 reg(DraftWorkflowTriggerRunPayload)
 reg(DraftWorkflowTriggerRunAllPayload)
 
@@ -1085,6 +1090,51 @@ class DraftWorkflowRestoreApi(Resource):
         }
 
 
+@console_ns.route("/apps/<uuid:app_id>/workflows/convert-type")
+class WorkflowTypeConvertApi(Resource):
+    @console_ns.doc("convert_published_workflow_type")
+    @console_ns.doc(description="Convert current effective published workflow type in-place")
+    @console_ns.doc(params={"app_id": "Application ID"})
+    @console_ns.expect(console_ns.models[WorkflowTypeConvertQuery.__name__])
+    @console_ns.response(200, "Workflow type converted successfully")
+    @console_ns.response(400, "Invalid workflow type or unsupported workflow graph")
+    @console_ns.response(404, "Workflow not found")
+    @setup_required
+    @login_required
+    @account_initialization_required
+    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
+    @edit_permission_required
+    def post(self, app_model: App):
+        current_user, _ = current_account_with_tenant()
+        args = WorkflowTypeConvertQuery.model_validate(request.args.to_dict(flat=True))  # type: ignore
+        target_type = WorkflowType.value_of(args.target_type)
+
+        workflow_service = WorkflowService()
+        with Session(db.engine) as session:
+            try:
+                workflow = workflow_service.convert_published_workflow_type(
+                    session=session,
+                    app_model=app_model,
+                    target_type=target_type,
+                    account=current_user,
+                )
+            except WorkflowNotFoundError as exc:
+                raise NotFound(str(exc)) from exc
+            except IsDraftWorkflowError as exc:
+                raise BadRequest(str(exc)) from exc
+            except ValueError as exc:
+                raise BadRequest(str(exc)) from exc
+
+            session.commit()
+
+        return {
+            "result": "success",
+            "workflow_id": workflow.id,
+            "type": workflow.type.value,
+            "updated_at": TimestampField().format(workflow.updated_at or workflow.created_at),
+        }
+
+
 @console_ns.route("/apps/<uuid:app_id>/workflows/<string:workflow_id>")
 class WorkflowByIdApi(Resource):
     @console_ns.doc("update_workflow_by_id")
diff --git a/api/services/workflow_service.py b/api/services/workflow_service.py
index 14c759f0e2..7ab629d443 100644
--- a/api/services/workflow_service.py
+++ b/api/services/workflow_service.py
@@ -459,6 +459,51 @@ class WorkflowService:
 
         return workflow
 
+    def convert_published_workflow_type(
+        self,
+        *,
+        session: Session,
+        app_model: App,
+        target_type: WorkflowType,
+        account: Account,
+    ) -> Workflow:
+        """
+        Convert a published workflow type in-place.
+
+        This endpoint only supports conversion between standard workflow and evaluation workflow.
+        """
+        if target_type not in {WorkflowType.WORKFLOW, WorkflowType.EVALUATION}:
+            raise ValueError("target_type must be either 'workflow' or 'evaluation'")
+
+        if not app_model.workflow_id:
+            raise WorkflowNotFoundError("Published workflow not found")
+
+        stmt = select(Workflow).where(
+            Workflow.tenant_id == app_model.tenant_id,
+            Workflow.app_id == app_model.id,
+            Workflow.id == app_model.workflow_id,
+        )
+        workflow = session.scalar(stmt)
+        if not workflow:
+            raise WorkflowNotFoundError("Published workflow not found")
+
+        if workflow.version == Workflow.VERSION_DRAFT:
+            raise IsDraftWorkflowError("Current effective workflow cannot be a draft version.")
+
+        if workflow.type == target_type:
+            return workflow
+
+        if target_type == WorkflowType.EVALUATION:
+            self._validate_evaluation_workflow_nodes(workflow)
+
+        workflow.type = target_type
+        workflow.updated_by = account.id
+        workflow.updated_at = naive_utc_now()
+
+        app_published_workflow_was_updated.send(app_model, published_workflow=workflow)
+
+        return workflow
+
     @staticmethod
     def _validate_evaluation_workflow_nodes(workflow: Workflow) -> None:
         """Ensure evaluation workflows do not contain unsupported node types."""