diff --git a/stac_fastapi/extensions/stac_fastapi/extensions/core/__init__.py b/stac_fastapi/extensions/stac_fastapi/extensions/core/__init__.py
index fa935d8e..fe8b6646 100644
--- a/stac_fastapi/extensions/stac_fastapi/extensions/core/__init__.py
+++ b/stac_fastapi/extensions/stac_fastapi/extensions/core/__init__.py
@@ -4,7 +4,7 @@
 from .context import ContextExtension
 from .fields import FieldsExtension
 from .filter import FilterExtension
-from .free_text import FreeTextExtension
+from .free_text import FreeTextAdvancedExtension, FreeTextExtension
 from .pagination import PaginationExtension, TokenPaginationExtension
 from .query import QueryExtension
 from .sort import SortExtension
@@ -16,6 +16,7 @@
     "FieldsExtension",
     "FilterExtension",
     "FreeTextExtension",
+    "FreeTextAdvancedExtension",
     "PaginationExtension",
     "QueryExtension",
     "SortExtension",
diff --git a/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/__init__.py b/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/__init__.py
index 1865d64f..53906bc1 100644
--- a/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/__init__.py
+++ b/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/__init__.py
@@ -1,5 +1,13 @@
 """Query extension module."""
 
-from .free_text import FreeTextConformanceClasses, FreeTextExtension
+from .free_text import (
+    FreeTextAdvancedExtension,
+    FreeTextConformanceClasses,
+    FreeTextExtension,
+)
 
-__all__ = ["FreeTextExtension", "FreeTextConformanceClasses"]
+__all__ = [
+    "FreeTextExtension",
+    "FreeTextAdvancedExtension",
+    "FreeTextConformanceClasses",
+]
diff --git a/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/free_text.py b/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/free_text.py
index be1c389a..8b61b32d 100644
--- a/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/free_text.py
+++ b/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/free_text.py
@@ -8,7 +8,12 @@
 
 from stac_fastapi.types.extension import ApiExtension
 
-from .request import FreeTextExtensionGetRequest, FreeTextExtensionPostRequest
+from .request import (
+    FreeTextAdvancedExtensionGetRequest,
+    FreeTextAdvancedExtensionPostRequest,
+    FreeTextExtensionGetRequest,
+    FreeTextExtensionPostRequest,
+)
 
 
 class FreeTextConformanceClasses(str, Enum):
@@ -19,9 +24,9 @@ class FreeTextConformanceClasses(str, Enum):
     """
 
     # https://github.com/stac-api-extensions/freetext-search?tab=readme-ov-file#basic
-    SEARCH_BASIC = "https://api.stacspec.org/v1.0.0-rc.1/item-search#free-text"
-    COLLECTIONS_BASIC = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#free-text"
-    ITEMS_BASIC = "https://api.stacspec.org/v1.0.0-rc.1/ogcapi-features#free-text"
+    SEARCH = "https://api.stacspec.org/v1.0.0-rc.1/item-search#free-text"
+    COLLECTIONS = "https://api.stacspec.org/v1.0.0-rc.1/collection-search#free-text"
+    ITEMS = "https://api.stacspec.org/v1.0.0-rc.1/ogcapi-features#free-text"
 
     # https://github.com/stac-api-extensions/freetext-search?tab=readme-ov-file#advanced
     SEARCH_ADVANCED = (
@@ -42,14 +47,55 @@ class FreeTextExtension(ApiExtension):
     The Free-text extension adds an additional `q` parameter to `/search` requests which
     allows the caller to perform free-text queries against STAC metadata.
 
-    https://github.com/stac-api-extensions/freetext-search/README.md
+    https://github.com/stac-api-extensions/freetext-search?tab=readme-ov-file#basic
 
     """
 
     GET = FreeTextExtensionGetRequest
     POST = FreeTextExtensionPostRequest
 
-    conformance_classes: List[str] = attr.ib()
+    conformance_classes: List[str] = attr.ib(
+        default=[
+            FreeTextConformanceClasses.SEARCH,
+            FreeTextConformanceClasses.COLLECTIONS,
+            FreeTextConformanceClasses.ITEMS,
+        ]
+    )
+    schema_href: Optional[str] = attr.ib(default=None)
+
+    def register(self, app: FastAPI) -> None:
+        """Register the extension with a FastAPI application.
+
+        Args:
+            app: target FastAPI application.
+
+        Returns:
+            None
+        """
+        pass
+
+
+@attr.s
+class FreeTextAdvancedExtension(ApiExtension):
+    """Free-text Extension.
+
+    The Free-text extension adds an additional `q` parameter to `/search` requests which
+    allows the caller to perform free-text queries against STAC metadata.
+
+    https://github.com/stac-api-extensions/freetext-search?tab=readme-ov-file#advanced
+
+    """
+
+    GET = FreeTextAdvancedExtensionGetRequest
+    POST = FreeTextAdvancedExtensionPostRequest
+
+    conformance_classes: List[str] = attr.ib(
+        default=[
+            FreeTextConformanceClasses.SEARCH_ADVANCED,
+            FreeTextConformanceClasses.COLLECTIONS_ADVANCED,
+            FreeTextConformanceClasses.ITEMS_ADVANCED,
+        ]
+    )
     schema_href: Optional[str] = attr.ib(default=None)
 
     def register(self, app: FastAPI) -> None:
diff --git a/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/request.py b/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/request.py
index 8058fe03..07aa7be8 100644
--- a/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/request.py
+++ b/stac_fastapi/extensions/stac_fastapi/extensions/core/free_text/request.py
@@ -1,31 +1,61 @@
 """Request model for the Free-text extension."""
 
-from typing import Optional
+from typing import List, Optional
 
 import attr
 from fastapi import Query
 from pydantic import BaseModel, Field
 from typing_extensions import Annotated
 
-from stac_fastapi.types.search import APIRequest
+from stac_fastapi.types.search import APIRequest, str2list
+
+
+def _ft_converter(
+    val: Annotated[
+        Optional[str],
+        Query(
+            description="Parameter to perform free-text queries against STAC metadata",
+            json_schema_extra={
+                "example": "ocean,coast",
+            },
+        ),
+    ] = None,
+) -> Optional[List[str]]:
+    return str2list(val)
 
 
 @attr.s
 class FreeTextExtensionGetRequest(APIRequest):
     """Free-text Extension GET request model."""
 
+    q: Optional[List[str]] = attr.ib(default=None, converter=_ft_converter)
+
+
+class FreeTextExtensionPostRequest(BaseModel):
+    """Free-text Extension POST request model."""
+
+    q: Optional[List[str]] = Field(
+        None,
+        description="Parameter to perform free-text queries against STAC metadata",
+    )
+
+
+@attr.s
+class FreeTextAdvancedExtensionGetRequest(APIRequest):
+    """Free-text Extension GET request model."""
+
     q: Annotated[
         Optional[str],
         Query(
             description="Parameter to perform free-text queries against STAC metadata",
             json_schema_extra={
-                "example": "item1,item2",
+                "example": "ocean,coast",
             },
         ),
     ] = attr.ib(default=None)
 
 
-class FreeTextExtensionPostRequest(BaseModel):
+class FreeTextAdvancedExtensionPostRequest(BaseModel):
     """Free-text Extension POST request model."""
 
     q: Optional[str] = Field(
diff --git a/stac_fastapi/extensions/tests/test_free_text.py b/stac_fastapi/extensions/tests/test_free_text.py
index 362d9602..55f253a3 100644
--- a/stac_fastapi/extensions/tests/test_free_text.py
+++ b/stac_fastapi/extensions/tests/test_free_text.py
@@ -11,7 +11,7 @@
     create_post_request_model,
     create_request_model,
 )
-from stac_fastapi.extensions.core import FreeTextExtension
+from stac_fastapi.extensions.core import FreeTextAdvancedExtension, FreeTextExtension
 from stac_fastapi.extensions.core.free_text import FreeTextConformanceClasses
 from stac_fastapi.types.config import ApiSettings
 from stac_fastapi.types.core import BaseCoreClient
@@ -41,9 +41,7 @@ def test_search_free_text_search():
     """Test search endpoints with free-text ext."""
     settings = ApiSettings()
     extensions = [
-        FreeTextExtension(
-            conformance_classes=[FreeTextConformanceClasses.SEARCH_BASIC.value]
-        )
+        FreeTextExtension(conformance_classes=[FreeTextConformanceClasses.SEARCH])
     ]
 
     api = StacApi(
@@ -57,9 +55,8 @@ def test_search_free_text_search():
         response = client.get("/conformance")
         assert response.is_success, response.json()
         response_dict = response.json()
-        assert (
-            FreeTextConformanceClasses.SEARCH_BASIC.value in response_dict["conformsTo"]
-        )
+        conforms = response_dict["conformsTo"]
+        assert FreeTextConformanceClasses.SEARCH in conforms
 
         # /search - GET, no free-text
         response = client.get(
@@ -78,7 +75,7 @@ def test_search_free_text_search():
             },
         )
         assert response.is_success, response.text
-        assert response.json() == "ocean,coast"
+        assert response.json() == ["ocean", "coast"]
 
         # /search - POST, no free-text
         response = client.post(
@@ -95,20 +92,98 @@ def test_search_free_text_search():
             "/search",
             json={
                 "collections": ["test"],
+                "q": ["ocean", "coast"],
+            },
+        )
+
+        assert response.is_success, response.text
+        assert response.json() == ["ocean", "coast"]
+
+
+def test_search_free_text_complete():
+    """Test search,collections,items endpoints with free-text ext."""
+    settings = ApiSettings()
+
+    free_text = FreeTextExtension(
+        conformance_classes=[
+            FreeTextConformanceClasses.SEARCH,
+            FreeTextConformanceClasses.ITEMS,
+            FreeTextConformanceClasses.COLLECTIONS,
+        ]
+    )
+
+    search_get_model = create_get_request_model([free_text])
+    search_post_model = create_post_request_model([free_text])
+    items_get_model = create_request_model(
+        "ItemCollectionURI",
+        base_model=ItemCollectionUri,
+        mixins=[free_text.GET],
+    )
+
+    api = StacApi(
+        settings=settings,
+        client=DummyCoreClient(),
+        extensions=[free_text],
+        search_get_request_model=search_get_model,
+        search_post_request_model=search_post_model,
+        collections_get_request_model=free_text.GET,
+        items_get_request_model=items_get_model,
+    )
+    with TestClient(api.app) as client:
+        response = client.get("/conformance")
+        assert response.is_success, response.json()
+        response_dict = response.json()
+        conforms = response_dict["conformsTo"]
+        assert FreeTextConformanceClasses.SEARCH in conforms
+        assert FreeTextConformanceClasses.ITEMS in conforms
+        assert FreeTextConformanceClasses.COLLECTIONS in conforms
+
+        # /search - GET, no free-text
+        response = client.get(
+            "/search",
+            params={"collections": ["test"]},
+        )
+        assert response.is_success
+        assert not response.text
+
+        # /search - GET, free-text option
+        response = client.get(
+            "/search",
+            params={
+                "collections": ["test"],
+                "q": "ocean,coast",
+            },
+        )
+        assert response.is_success, response.text
+        assert response.json() == ["ocean", "coast"]
+
+        # /collections - GET, free-text option
+        response = client.get(
+            "/collections",
+            params={
                 "q": "ocean,coast",
             },
         )
+        assert response.is_success, response.text
+        assert response.json() == ["ocean", "coast"]
 
+        # /items - GET, free-text option
+        response = client.get(
+            "/collections/test/items",
+            params={
+                "q": "ocean,coast",
+            },
+        )
         assert response.is_success, response.text
-        assert response.json() == "ocean,coast"
+        assert response.json() == ["ocean", "coast"]
 
 
-def test_search_free_text_search_advances():
+def test_search_free_text_search_advanced():
     """Test search endpoints with free-text ext."""
     settings = ApiSettings()
     extensions = [
-        FreeTextExtension(
-            conformance_classes=[FreeTextConformanceClasses.SEARCH_ADVANCED.value]
+        FreeTextAdvancedExtension(
+            conformance_classes=[FreeTextConformanceClasses.SEARCH_ADVANCED]
         )
     ]
 
@@ -123,10 +198,9 @@ def test_search_free_text_search_advances():
         response = client.get("/conformance")
         assert response.is_success, response.json()
         response_dict = response.json()
-        assert (
-            FreeTextConformanceClasses.SEARCH_ADVANCED.value
-            in response_dict["conformsTo"]
-        )
+
+        conforms = response_dict["conformsTo"]
+        assert FreeTextConformanceClasses.SEARCH_ADVANCED in conforms
 
         # /search - GET, no free-text
         response = client.get(
@@ -170,15 +244,15 @@ def test_search_free_text_search_advances():
         assert response.json() == "+ocean,-coast"
 
 
-def test_search_free_text_complete():
+def test_search_free_text_advanced_complete():
     """Test search,collections,items endpoints with free-text ext."""
     settings = ApiSettings()
 
-    free_text = FreeTextExtension(
+    free_text = FreeTextAdvancedExtension(
         conformance_classes=[
-            FreeTextConformanceClasses.SEARCH_BASIC.value,
-            FreeTextConformanceClasses.ITEMS_BASIC.value,
-            FreeTextConformanceClasses.COLLECTIONS_BASIC.value,
+            FreeTextConformanceClasses.SEARCH_ADVANCED,
+            FreeTextConformanceClasses.ITEMS_ADVANCED,
+            FreeTextConformanceClasses.COLLECTIONS_ADVANCED,
         ]
     )
 
@@ -203,14 +277,10 @@ def test_search_free_text_complete():
         response = client.get("/conformance")
         assert response.is_success, response.json()
         response_dict = response.json()
-        assert (
-            FreeTextConformanceClasses.SEARCH_BASIC.value in response_dict["conformsTo"]
-        )
-        assert FreeTextConformanceClasses.ITEMS_BASIC.value in response_dict["conformsTo"]
-        assert (
-            FreeTextConformanceClasses.COLLECTIONS_BASIC.value
-            in response_dict["conformsTo"]
-        )
+        conforms = response_dict["conformsTo"]
+        assert FreeTextConformanceClasses.SEARCH_ADVANCED in conforms
+        assert FreeTextConformanceClasses.ITEMS_ADVANCED in conforms
+        assert FreeTextConformanceClasses.COLLECTIONS_ADVANCED in conforms
 
         # /search - GET, no free-text
         response = client.get(