diff --git a/etiquette/constants.py b/etiquette/constants.py
index b964d89..f9aae6e 100644
--- a/etiquette/constants.py
+++ b/etiquette/constants.py
@@ -226,9 +226,6 @@ You can\'t order "{column}" by "{direction}". Defaulting to descending.
 # Janitorial stuff #################################################################################
 
 FILENAME_BADCHARS = '\\/:*?<>|"'
-TRUTHYSTRING_TRUE = {s.lower() for s in ('1', 'true', 't', 'yes', 'y', 'on')}
-TRUTHYSTRING_FALSE = {s.lower() for s in ('0', 'false', 'f', 'no', 'n', 'off')}
-TRUTHYSTRING_NONE = {s.lower() for s in ('null', 'none')}
 
 USER_ID_CHARACTERS = string.digits + string.ascii_uppercase
 
diff --git a/etiquette/helpers.py b/etiquette/helpers.py
index c8a61d2..d873b87 100644
--- a/etiquette/helpers.py
+++ b/etiquette/helpers.py
@@ -459,32 +459,6 @@ def split_easybake_string(ebstring) -> tuple[str, str, str]:
     tagname = tagname.strip('.')
     return (tagname, synonym, rename_to)
 
-def truthystring(s, fallback=False) -> typing.Union[bool, None]:
-    '''
-    If s is already a boolean, int, or None, return a boolean or None.
-    If s is a string, return True, False, or None based on the options presented
-    in constants.TRUTHYSTRING_TRUE, TRUTHYSTRING_FALSE, TRUTHYSTRING_NONE where
-    s is treated case-insensitively.
-    If s is not in any of those sets, return the fallback.
-    '''
-    if s is None:
-        return None
-
-    if isinstance(s, (bool, int)):
-        return bool(s)
-
-    if not isinstance(s, str):
-        return fallback
-
-    s = s.lower()
-    if s in constants.TRUTHYSTRING_TRUE:
-        return True
-    if s in constants.TRUTHYSTRING_FALSE:
-        return False
-    if s in constants.TRUTHYSTRING_NONE:
-        return None
-    return False
-
 def zip_album(album, recursive=True) -> zipstream.ZipFile:
     '''
     Given an album, return a zipstream zipfile that contains the album's
diff --git a/etiquette/searchhelpers.py b/etiquette/searchhelpers.py
index ae4905e..ff82968 100644
--- a/etiquette/searchhelpers.py
+++ b/etiquette/searchhelpers.py
@@ -193,21 +193,21 @@ def normalize_filename(filename_terms):
 
 def normalize_has_tags(has_tags):
     '''
-    See etiquette.helpers.truthystring.
+    See voussoirkit.stringtools.truthystring.
     '''
-    return helpers.truthystring(has_tags)
+    return stringtools.truthystring(has_tags, None)
 
 def normalize_has_thumbnail(has_thumbnail):
     '''
-    See etiquette.helpers.truthystring.
+    See voussoirkit.stringtools.truthystring.
     '''
-    return helpers.truthystring(has_thumbnail)
+    return stringtools.truthystring(has_thumbnail, None)
 
 def normalize_is_searchhidden(is_searchhidden):
     '''
-    See etiquette.helpers.truthystring.
+    See voussoirkit.stringtools.truthystring.
     '''
-    return helpers.truthystring(is_searchhidden)
+    return stringtools.truthystring(is_searchhidden, None)
 
 def _limit_offset(number, warning_bag):
     if number is None:
@@ -447,15 +447,15 @@ def normalize_within_directory(paths, warning_bag=None):
 
 def normalize_yield_albums(yield_albums):
     '''
-    See etiquette.helpers.truthystring.
+    See voussoirkit.stringtools.truthystring.
     '''
-    return helpers.truthystring(yield_albums)
+    return stringtools.truthystring(yield_albums, None)
 
 def normalize_yield_photos(yield_photos):
     '''
-    See etiquette.helpers.truthystring.
+    See voussoirkit.stringtools.truthystring.
     '''
-    return helpers.truthystring(yield_photos)
+    return stringtools.truthystring(yield_photos, None)
 
 EXIST_FORMAT = '''
 {operator} (
diff --git a/frontends/etiquette_flask/backend/endpoints/album_endpoints.py b/frontends/etiquette_flask/backend/endpoints/album_endpoints.py
index ee25bb1..5aa5b39 100644
--- a/frontends/etiquette_flask/backend/endpoints/album_endpoints.py
+++ b/frontends/etiquette_flask/backend/endpoints/album_endpoints.py
@@ -37,7 +37,7 @@ def get_album_zip(album_id):
     album = common.P_album(album_id, response_type='html')
 
     recursive = request.args.get('recursive', True)
-    recursive = etiquette.helpers.truthystring(recursive)
+    recursive = stringtools.truthystring(recursive)
 
     streamed_zip = etiquette.helpers.zip_album(album, recursive=recursive)
 
@@ -152,7 +152,7 @@ def post_album_add_tag(album_id):
         response = exc.jsonify()
         return flasktools.make_json_response(response, status=404)
     recursive = request.form.get('recursive', False)
-    recursive = etiquette.helpers.truthystring(recursive)
+    recursive = stringtools.truthystring(recursive)
     album.add_tag_to_all(tag, nested_children=recursive, commit=True)
     response['action'] = 'add_tag'
     response['tagname'] = tag.name
diff --git a/frontends/etiquette_flask/backend/endpoints/photo_endpoints.py b/frontends/etiquette_flask/backend/endpoints/photo_endpoints.py
index eb06046..e125f25 100644
--- a/frontends/etiquette_flask/backend/endpoints/photo_endpoints.py
+++ b/frontends/etiquette_flask/backend/endpoints/photo_endpoints.py
@@ -37,10 +37,10 @@ def get_file(photo_id, basename=None):
     photo = common.P.get_photo(photo_id)
 
     do_download = request.args.get('download', False)
-    do_download = etiquette.helpers.truthystring(do_download)
+    do_download = stringtools.truthystring(do_download)
 
     use_original_filename = request.args.get('original_filename', False)
-    use_original_filename = etiquette.helpers.truthystring(use_original_filename)
+    use_original_filename = stringtools.truthystring(use_original_filename)
 
     if do_download:
         if use_original_filename:
@@ -73,7 +73,7 @@ def post_photo_delete(photo_id):
     print(photo_id)
     photo = common.P_photo(photo_id, response_type='json')
     delete_file = request.form.get('delete_file', False)
-    delete_file = etiquette.helpers.truthystring(delete_file)
+    delete_file = stringtools.truthystring(delete_file)
     photo.delete(delete_file=delete_file, commit=True)
     return flasktools.make_json_response({})
 
diff --git a/frontends/etiquette_flask/backend/endpoints/tag_endpoints.py b/frontends/etiquette_flask/backend/endpoints/tag_endpoints.py
index b3a75ed..7317b5a 100644
--- a/frontends/etiquette_flask/backend/endpoints/tag_endpoints.py
+++ b/frontends/etiquette_flask/backend/endpoints/tag_endpoints.py
@@ -1,6 +1,7 @@
 import flask; from flask import request
 
 from voussoirkit import flasktools
+from voussoirkit import stringtools
 
 import etiquette
 
@@ -36,7 +37,7 @@ def get_tag_json(specific_tag_name):
         return flask.redirect(new_url)
 
     include_synonyms = request.args.get('synonyms')
-    include_synonyms = include_synonyms is None or etiquette.helpers.truthystring(include_synonyms)
+    include_synonyms = include_synonyms is None or stringtools.truthystring(include_synonyms)
 
     response = specific_tag.jsonify(include_synonyms=include_synonyms)
     return flasktools.make_json_response(response)
@@ -117,7 +118,7 @@ def get_tags_html(specific_tag_name=None):
             return flask.redirect(new_url)
 
     include_synonyms = request.args.get('include_synonyms')
-    include_synonyms = include_synonyms is None or etiquette.helpers.truthystring(include_synonyms)
+    include_synonyms = include_synonyms is None or stringtools.truthystring(include_synonyms)
 
     if specific_tag is None:
         tags = common.P.get_root_tags()
@@ -147,7 +148,7 @@ def get_tags_html(specific_tag_name=None):
 @site.route('/tags.json')
 def get_tags_json():
     include_synonyms = request.args.get('synonyms')
-    include_synonyms = include_synonyms is None or etiquette.helpers.truthystring(include_synonyms)
+    include_synonyms = include_synonyms is None or stringtools.truthystring(include_synonyms)
 
     tags = list(common.P.get_tags())
     response = [tag.jsonify(include_synonyms=include_synonyms) for tag in tags]