diff --git a/source/blender/blenkernel/BKE_editmesh.h b/source/blender/blenkernel/BKE_editmesh.h
index d713402ff74..ede7e19f1f1 100644
--- a/source/blender/blenkernel/BKE_editmesh.h
+++ b/source/blender/blenkernel/BKE_editmesh.h
@@ -59,7 +59,7 @@ typedef struct BMEditMesh {
   int mirror_cdlayer;
 
   /**
-   * Enable for evaluated copies, causes the edit-mesh to free the memory, not it's contents.
+   * Enable for evaluated copies, causes the edit-mesh to free the memory, not its contents.
    */
   char is_shallow_copy;
 
diff --git a/source/blender/blenkernel/intern/blendfile.cc b/source/blender/blenkernel/intern/blendfile.cc
index 65c292b5f3a..5e40fb1b181 100644
--- a/source/blender/blenkernel/intern/blendfile.cc
+++ b/source/blender/blenkernel/intern/blendfile.cc
@@ -416,7 +416,7 @@ static void swap_wm_data_for_blendfile(ReuseOldBMainData *reuse_data, const bool
    * for further processing in WM code. */
   if (load_ui && new_wm != nullptr) {
     /* Support window-manager ID references being held between file load operations by keeping
-     * #Main.wm.first memory address in-place, while swapping all of it's contents.
+     * #Main.wm.first memory address in-place, while swapping all of its contents.
      *
      * This is needed so items such as key-maps can be held by an add-on,
      * without it pointing to invalid memory, see: #86431. */
diff --git a/source/blender/bmesh/intern/bmesh_construct.h b/source/blender/bmesh/intern/bmesh_construct.h
index 85c2854d43c..4e216d4ccec 100644
--- a/source/blender/bmesh/intern/bmesh_construct.h
+++ b/source/blender/bmesh/intern/bmesh_construct.h
@@ -139,7 +139,7 @@ void BM_elem_attrs_copy(BMesh *bm_src, BMesh *bm_dst, const void *ele_src_v, voi
 void BM_elem_select_copy(BMesh *bm_dst, void *ele_dst_v, const void *ele_src_v);
 
 /**
- * Initialize the `bm_dst` layers in preparation for populating it's contents with multiple meshes.
+ * Initialize the `bm_dst` layers in preparation for populating its contents with multiple meshes.
  * Typically done using multiple calls to #BM_mesh_bm_from_me with the same `bm` argument).
  *
  * \note While the custom-data layers of all meshes are created, the active layers are set
diff --git a/source/blender/editors/mesh/editmesh_utils.c b/source/blender/editors/mesh/editmesh_utils.c
index 92b6ccfc342..4a313090ba6 100644
--- a/source/blender/editors/mesh/editmesh_utils.c
+++ b/source/blender/editors/mesh/editmesh_utils.c
@@ -661,7 +661,7 @@ static int bm_uv_edge_select_build_islands(UvElementMap *element_map,
   for (int i = 0; i < total_uvs; i++) {
     UvElement *element = element_map->storage + i;
     if (element->island != INVALID_ISLAND) {
-      /* Unique UV (element and all it's children) are already part of an island. */
+      /* Unique UV (element and all its children) are already part of an island. */
       continue;
     }
 
diff --git a/source/blender/editors/space_view3d/view3d_navigate_smoothview.c b/source/blender/editors/space_view3d/view3d_navigate_smoothview.c
index fa8c2437dbc..7f02d38243b 100644
--- a/source/blender/editors/space_view3d/view3d_navigate_smoothview.c
+++ b/source/blender/editors/space_view3d/view3d_navigate_smoothview.c
@@ -34,7 +34,7 @@ static void view3d_smoothview_apply_with_interp(
  * may need to perform an undo push.
  *
  * In this case the smooth-view camera transformation is temporarily completed,
- * undo is pushed then the change is rewound, and smooth-view completes from it's timer.
+ * undo is pushed then the change is rewound, and smooth-view completes from its timer.
  * In the case smooth-view executed the change immediately - an undo push is called.
  *
  * NOTE(@ideasman42): While this is not ideal it's necessary as making the undo-push
diff --git a/source/blender/editors/space_view3d/view3d_placement.c b/source/blender/editors/space_view3d/view3d_placement.c
index 1e4db88fe29..bcfcdc1370e 100644
--- a/source/blender/editors/space_view3d/view3d_placement.c
+++ b/source/blender/editors/space_view3d/view3d_placement.c
@@ -80,13 +80,13 @@ struct InteractivePlaceData {
   struct {
     /**
      * When centered, drag out the shape from the center.
-     * Toggling the setting flips the value from it's initial state.
+     * Toggling the setting flips the value from its initial state.
      */
     bool is_centered, is_centered_init;
     /**
      * When fixed, constrain the X/Y aspect for the initial #STEP_BASE drag.
      * For #STEP_DEPTH match the maximum X/Y dimension.
-     * Toggling the setting flips the value from it's initial state.
+     * Toggling the setting flips the value from its initial state.
      */
     bool is_fixed_aspect, is_fixed_aspect_init;
     float plane[4];
@@ -124,7 +124,7 @@ struct InteractivePlaceData {
 
   } step[2];
 
-  /** When we can't project onto the real plane, use this in it's place. */
+  /** When we can't project onto the real plane, use this in its place. */
   float view_plane[4];
 
   float matrix_orient[3][3];
diff --git a/source/blender/editors/transform/transform_convert_sequencer.c b/source/blender/editors/transform/transform_convert_sequencer.c
index 47cbb8ad17d..2366ec4c38f 100644
--- a/source/blender/editors/transform/transform_convert_sequencer.c
+++ b/source/blender/editors/transform/transform_convert_sequencer.c
@@ -404,7 +404,7 @@ static SeqCollection *query_time_dependent_strips_strips(TransInfo *t)
 
   /* Query dependent strips where used strips do not have handles selected.
    * If all inputs of any effect even indirectly(through another effect) points to selected strip,
-   * it's position will change. */
+   * its position will change. */
 
   SeqCollection *strips_no_handles = query_selected_strips_no_handles(seqbase);
   /* Selection is needed as reference for related strips. */
diff --git a/source/blender/editors/uvedit/uvedit_unwrap_ops.cc b/source/blender/editors/uvedit/uvedit_unwrap_ops.cc
index aaf4af66623..918dcfb4d1f 100644
--- a/source/blender/editors/uvedit/uvedit_unwrap_ops.cc
+++ b/source/blender/editors/uvedit/uvedit_unwrap_ops.cc
@@ -1527,7 +1527,7 @@ static int pack_islands_exec(bContext *C, wmOperator *op)
   if (pid->use_job) {
     /* Setup job. */
     if (pid->wm->op_undo_depth == 0) {
-      /* The job must do it's own undo push. */
+      /* The job must do its own undo push. */
       pid->undo_context = C;
       pid->undo_str = op->type->name;
     }
diff --git a/source/blender/windowmanager/WM_api.h b/source/blender/windowmanager/WM_api.h
index bfd826450c4..ca62313cc54 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -153,7 +153,7 @@ void WM_init_gpu(void);
 const char *WM_ghost_backend(void);
 
 typedef enum eWM_CapabilitiesFlag {
-  /** Ability to warp the cursor (set it's location). */
+  /** Ability to warp the cursor (set its location). */
   WM_CAPABILITY_CURSOR_WARP = (1 << 0),
   /** Ability to access window positions & move them. */
   WM_CAPABILITY_WINDOW_POSITION = (1 << 1),
@@ -184,7 +184,7 @@ void WM_script_tag_reload(void);
 wmWindow *WM_window_find_under_cursor(wmWindow *win, const int mval[2], int r_mval[2]);
 
 /**
- * Knowing the area, return it's screen.
+ * Knowing the area, return its screen.
  * \note This should typically be avoided, only use when the context is not available.
  */
 wmWindow *WM_window_find_by_area(wmWindowManager *wm, const struct ScrArea *area);
@@ -786,7 +786,7 @@ bool WM_operator_name_poll(struct bContext *C, const char *opstring);
  * \param event: Optionally pass in an event to use when context uses one of the
  * `WM_OP_INVOKE_*` values. When left unset the #wmWindow.eventstate will be used,
  * this can cause problems for operators that read the events type - for example,
- * storing the key that was pressed so as to be able to detect it's release.
+ * storing the key that was pressed so as to be able to detect its release.
  * In these cases it's necessary to forward the current event being handled.
  */
 int WM_operator_name_call_ptr(struct bContext *C,
diff --git a/source/blender/windowmanager/gizmo/WM_gizmo_api.h b/source/blender/windowmanager/gizmo/WM_gizmo_api.h
index 3d14f167b56..ddb1c70a039 100644
--- a/source/blender/windowmanager/gizmo/WM_gizmo_api.h
+++ b/source/blender/windowmanager/gizmo/WM_gizmo_api.h
@@ -114,11 +114,11 @@ void WM_gizmo_set_fn_custom_modal(struct wmGizmo *gz, wmGizmoFnModal fn);
 
 void WM_gizmo_set_matrix_location(struct wmGizmo *gz, const float origin[3]);
 /**
- * #wmGizmo.matrix utility, set the orientation by it's Z axis.
+ * #wmGizmo.matrix utility, set the orientation by its Z axis.
  */
 void WM_gizmo_set_matrix_rotation_from_z_axis(struct wmGizmo *gz, const float z_axis[3]);
 /**
- * #wmGizmo.matrix utility, set the orientation by it's Y/Z axis.
+ * #wmGizmo.matrix utility, set the orientation by its Y/Z axis.
  */
 void WM_gizmo_set_matrix_rotation_from_yz_axis(struct wmGizmo *gz,
                                                const float y_axis[3],
@@ -126,11 +126,11 @@ void WM_gizmo_set_matrix_rotation_from_yz_axis(struct wmGizmo *gz,
 
 void WM_gizmo_set_matrix_offset_location(struct wmGizmo *gz, const float offset[3]);
 /**
- * #wmGizmo.matrix_offset utility, set the orientation by it's Z axis.
+ * #wmGizmo.matrix_offset utility, set the orientation by its Z axis.
  */
 void WM_gizmo_set_matrix_offset_rotation_from_z_axis(struct wmGizmo *gz, const float z_axis[3]);
 /**
- * #wmGizmo.matrix_offset utility, set the orientation by it's Y/Z axis.
+ * #wmGizmo.matrix_offset utility, set the orientation by its Y/Z axis.
  */
 void WM_gizmo_set_matrix_offset_rotation_from_yz_axis(struct wmGizmo *gz,
                                                       const float y_axis[3],
diff --git a/source/blender/windowmanager/intern/wm_draw.c b/source/blender/windowmanager/intern/wm_draw.c
index 7aa837958a5..77b829879ba 100644
--- a/source/blender/windowmanager/intern/wm_draw.c
+++ b/source/blender/windowmanager/intern/wm_draw.c
@@ -1297,7 +1297,7 @@ uint8_t *WM_window_pixels_read_from_offscreen(bContext *C, wmWindow *win, int r_
    *
    * So provide an alternative to #WM_window_pixels_read that avoids using the front-buffer. */
 
-  /* Draw into an off-screen buffer and read it's contents. */
+  /* Draw into an off-screen buffer and read its contents. */
   r_size[0] = WM_window_pixels_x(win);
   r_size[1] = WM_window_pixels_y(win);
 
diff --git a/tests/python/bl_keymap_validate.py b/tests/python/bl_keymap_validate.py
index 11da4d562b0..50f23406420 100644
--- a/tests/python/bl_keymap_validate.py
+++ b/tests/python/bl_keymap_validate.py
@@ -77,7 +77,7 @@ def temp_fn_argument_extractor(
         mod_attr: str,
 ) -> Generator[List[Tuple[Tuple[Tuple[Any], ...], Dict[str, Dict[str, Any]]]], None, None]:
     """
-    Temporarily intercept a function, so it's arguments can be extracted.
+    Temporarily intercept a function, so its arguments can be extracted.
     The context manager gives us a list where each item is a tuple of
     arguments & keywords, stored each time the function was called.
     """
diff --git a/tools/utils_maintenance/code_clean.py b/tools/utils_maintenance/code_clean.py
index 8e09d0a182e..3668cde23ba 100755
--- a/tools/utils_maintenance/code_clean.py
+++ b/tools/utils_maintenance/code_clean.py
@@ -91,7 +91,7 @@ IDENTIFIER_CHARS = set(string.ascii_letters + "_" + string.digits)
 # -----------------------------------------------------------------------------
 # General Utilities
 
-# Note that we could use a hash, however there is no advantage, compare it's contents.
+# Note that we could use a hash, however there is no advantage, compare its contents.
 def file_as_bytes(filename: str) -> bytes:
     with open(filename, 'rb') as fh:
         return fh.read()