diff --git a/picard/script.py b/picard/script.py
index 03352ebb3..ab28189a0 100644
--- a/picard/script.py
+++ b/picard/script.py
@@ -174,6 +174,23 @@ class FunctionRegistryItem:
             return ''
 
 
+class ScriptFunctionDocError(Exception):
+    pass
+
+
+def script_function_documentation(name, fmt):
+    functions = dict(ScriptParser._function_registry)
+    if name not in functions:
+        raise ScriptFunctionDocError("no such function: %s (known functions: %r)" % (name, [name for name in functions]))
+
+    if fmt == 'html':
+        return functions[name].htmldoc()
+    elif fmt == 'markdown':
+        return functions[name].markdowndoc()
+    else:
+        raise ScriptFunctionDocError("no such documentation format: %s (known formats: html, markdown)" % fmt)
+
+
 Bound = namedtuple("Bound", ["lower", "upper"])
 
 
diff --git a/test/test_script.py b/test/test_script.py
index fd003710e..0d4074db5 100644
--- a/test/test_script.py
+++ b/test/test_script.py
@@ -46,12 +46,14 @@ from picard.script import (
     ScriptError,
     ScriptExpression,
     ScriptFunction,
+    ScriptFunctionDocError,
     ScriptParser,
     ScriptRuntimeError,
     ScriptSyntaxError,
     ScriptUnknownFunction,
     register_script_function,
     script_function,
+    script_function_documentation,
 )
 
 
@@ -174,6 +176,23 @@ class ScriptParserTest(PicardTestCase):
             return arg.eval(parser)
         self.assertScriptResultEquals("$somefunc($title(x))", "X")
 
+    def test_script_function_documentation(self):
+        # test decorator documentation
+        markdown = '`$somefunc()`'
+        @script_function(documentation=markdown)
+        def func_somefunc(parser):
+            return "x"
+        doc = script_function_documentation('somefunc', 'markdown')
+        self.assertEqual(doc, markdown)
+        doc = script_function_documentation('somefunc', 'html')
+        self.assertEqual(doc, '<p><code>$somefunc()</code></p>')
+        areg = r"^no such function: unknownfunc"
+        with self.assertRaisesRegex(ScriptFunctionDocError, areg):
+            script_function_documentation('unknownfunc', 'html')
+        areg = r"^no such documentation format: unknownformat"
+        with self.assertRaisesRegex(ScriptFunctionDocError, areg):
+            script_function_documentation('somefunc', 'unknownformat')
+
     def test_unknown_function(self):
         areg = r"^\d+:\d+:\$unknownfunction: Unknown function '\$unknownfunction'"
         with self.assertRaisesRegex(ScriptError, areg):