diff --git a/snippets/toSnakeCase.md b/snippets/toSnakeCase.md
new file mode 100644
index 00000000000..957fd3a78f3
--- /dev/null
+++ b/snippets/toSnakeCase.md
@@ -0,0 +1,14 @@
+### toSnakeCase
+
+Converts a string to snakecase.
+
+Use `replace()` to add underscores before capital letters, convert `toLowerCase()`, then `replace()` hyphens and spaces with underscores.
+
+```js
+const toSnakeCase = str =>
+  str.replace(/(\w)([A-Z])/g, '$1_$2').replace(/[\s-_]+/g, '_').toLowerCase();
+// toSnakeCase("camelCase") -> 'camel_case'
+// toSnakeCase("some text") -> 'some_text'
+// toSnakeCase("some-javascript-property") -> 'some_javascript_property'
+// toSnakeCase("some-mixed_string With spaces_underscores-and-hyphens") -> 'some_mixed_string_with_spaces_underscores_and_hyphens'
+```
diff --git a/tag_database b/tag_database
index deb4c89027a..e1c6987d5e1 100644
--- a/tag_database
+++ b/tag_database
@@ -117,6 +117,7 @@ toCamelCase:string
 toDecimalMark:utility
 toEnglishDate:date
 toOrdinalSuffix:utility
+toSnakeCase:string
 truncateString:string
 truthCheckCollection:object
 union:array