diff --git a/src/pages/tableau.py b/src/pages/tableau.py
index 56bdf00..74b0b5d 100644
--- a/src/pages/tableau.py
+++ b/src/pages/tableau.py
@@ -25,6 +25,7 @@ from src.utils import get_data_update_timestamp, logger
 from src.utils.seo import META_CONTENT
 from src.utils.table import (
     COLUMNS,
+    build_view_query,
     filter_table_data,
     get_default_hidden_columns,
     invert_columns,
@@ -425,19 +426,7 @@ def sync_url_and_reset_button(filter_query, sort_by, hidden_columns, href):
     # Extract base URL (remove existing query params)
     base_url = href.split("?")[0]
 
-    params = {}
-    if filter_query:
-        params["filtres"] = filter_query
-
-    if sort_by:
-        params["tris"] = json.dumps(sort_by)
-
-    if hidden_columns:
-        table_columns = invert_columns(hidden_columns)
-        table_columns = ",".join(table_columns)
-        params["colonnes"] = table_columns
-
-    query_string = urllib.parse.urlencode(params)
+    query_string = build_view_query(filter_query, sort_by, hidden_columns)
     full_url = f"{base_url}?{query_string}" if query_string else base_url
 
     copy_button = dcc.Clipboard(
diff --git a/src/utils/table.py b/src/utils/table.py
index 1a96289..0298012 100644
--- a/src/utils/table.py
+++ b/src/utils/table.py
@@ -1,4 +1,6 @@
+import json
 import os
+import urllib.parse
 import uuid
 
 import polars as pl
@@ -557,6 +559,23 @@ def invert_columns(columns):
     return inverted_columns
 
 
+def build_view_query(filter_query, sort_by, hidden_columns) -> str:
+    """
+    Construit la query string d'une vue Tableau (filtres + tris + colonnes),
+    identique à celle produite par le bouton « Partager la vue ».
+
+    hidden_columns : colonnes masquées ; on stocke les colonnes visibles.
+    """
+    params = {}
+    if filter_query:
+        params["filtres"] = filter_query
+    if sort_by:
+        params["tris"] = json.dumps(sort_by)
+    if hidden_columns:
+        params["colonnes"] = ",".join(invert_columns(hidden_columns))
+    return urllib.parse.urlencode(params)
+
+
 COLUMNS = schema.names()
 
 _EXCEL_MIN_COLUMN_WIDTH = 132  # ≈ 3.5 cm à 96 DPI
diff --git a/tests/saved_views/test_build_view_query.py b/tests/saved_views/test_build_view_query.py
new file mode 100644
index 0000000..78f59e5
--- /dev/null
+++ b/tests/saved_views/test_build_view_query.py
@@ -0,0 +1,34 @@
+import urllib.parse
+
+from src.utils.table import build_view_query
+
+
+def test_empty_inputs_give_empty_string():
+    assert build_view_query(None, None, None) == ""
+    assert build_view_query("", [], []) == ""
+
+
+def test_filter_only():
+    q = build_view_query("{objet} icontains route", None, None)
+    params = urllib.parse.parse_qs(q)
+    assert params["filtres"] == ["{objet} icontains route"]
+    assert "tris" not in params
+    assert "colonnes" not in params
+
+
+def test_sort_is_json_encoded():
+    sort_by = [{"column_id": "montant", "direction": "desc"}]
+    q = build_view_query(None, sort_by, None)
+    params = urllib.parse.parse_qs(q)
+    import json
+
+    assert json.loads(params["tris"][0]) == sort_by
+
+
+def test_hidden_columns_become_visible_csv():
+    # build_view_query reçoit les colonnes MASQUÉES et stocke les VISIBLES
+    q = build_view_query(None, None, ["objet"])
+    params = urllib.parse.parse_qs(q)
+    visible = params["colonnes"][0].split(",")
+    assert "objet" not in visible
+    assert len(visible) > 0