diff --git a/bin/check_modules.pl b/bin/check_modules.pl
index 7bb9a38bb7..6aef84329d 100755
--- a/bin/check_modules.pl
+++ b/bin/check_modules.pl
@@ -127,6 +127,7 @@ =head1 DESCRIPTION
 	Opcode
 	PadWalker
 	Path::Class
+	Perl::Tidy
 	PHP::Serialization
 	Pod::Simple::Search
 	Pod::Simple::XHTML
@@ -160,6 +161,7 @@ =head1 DESCRIPTION
 	'LWP::Protocol::https' => 6.06,
 	'Mojolicious'          => 9.22,
 	'Net::SSLeay'          => 1.46,
+	'Perl::Tidy'           => 20220613
 );
 
 my ($test_programs, $test_modules, $show_help);
diff --git a/conf/snippets/newProblem.pg b/conf/snippets/newProblem.pg
index 3ab92489b4..75289789ee 100644
--- a/conf/snippets/newProblem.pg
+++ b/conf/snippets/newProblem.pg
@@ -14,9 +14,9 @@
 DOCUMENT();
 
 loadMacros(
-   "PGstandard.pl",   # Standard macros for PG language
-   "PGML.pl",         # PGML markup and Math Objects
-   "PGcourse.pl",     # Customization file for the course
+    "PGstandard.pl",    # Standard macros for PG language
+    "PGML.pl",          # PGML markup and Math Objects
+    "PGcourse.pl",      # Customization file for the course
 );
 
 # Uncomment the following if you don't want to show which
@@ -34,6 +34,6 @@ END_PGML
 BEGIN_PGML_SOLUTION
 You could type [|pi|]* or [|3.14|]*, or [|22/7|]*,
 among other options.
-END_PGML_SOLUTION 
+END_PGML_SOLUTION
 
 ENDDOCUMENT();
diff --git a/htdocs/js/PGProblemEditor/pgproblemeditor.js b/htdocs/js/PGProblemEditor/pgproblemeditor.js
index b0dedbf798..64a92a0ca3 100644
--- a/htdocs/js/PGProblemEditor/pgproblemeditor.js
+++ b/htdocs/js/PGProblemEditor/pgproblemeditor.js
@@ -98,7 +98,53 @@
 			?.addEventListener('change', () => deleteBackupCheck.checked = true);
 	}
 
+	// Send a request to the server to perltidy the current PG code in the CodeMirror editor.
+	const tidyPGCode = () => {
+		const request_object = {
+			user: document.getElementById('hidden_user')?.value,
+			courseID: document.getElementsByName('courseID')[0]?.value,
+			key: document.getElementById('hidden_key')?.value
+		};
+
+		request_object.rpc_command = 'tidyPGCode';
+		request_object.pgCode = webworkConfig?.pgCodeMirror?.getValue()
+			?? document.getElementById('problemContents')?.value ?? '';
+
+		fetch(webserviceURL, { method: 'post', mode: 'same-origin', body: new URLSearchParams(request_object) })
+			.then((response) => response.json())
+			.then((data) => {
+				if (data.result_data.status) {
+					if (data.result_data.errors) {
+						renderArea.innerHTML = '<div class="alert alert-danger p-1 m-2">' +
+							'<p class="fw-bold">PG perltidy errors:</p>' +
+							'<pre><code>' +
+							data.result_data.errors
+							.replace(/^[\s\S]*Begin Error Output Stream\n\n/, '')
+							.replace(/\n\d*: To save a full \.LOG file rerun with -g/, '') +
+							'</code></pre>';
+					}
+					showMessage('Errors occurred perltidying code.', false);
+					return;
+				}
+				if (request_object.pgCode === data.result_data.tidiedPGCode) {
+					showMessage('There were no changes to the code.', true);
+				} else {
+					if (webworkConfig?.pgCodeMirror) webworkConfig.pgCodeMirror.setValue(data.result_data.tidiedPGCode);
+					else document.getElementById('problemContents').value = data.result_data.tidiedPGCode;
+					saveTempFile();
+					showMessage('Successfuly perltidied code.', true);
+				}
+			})
+			.catch((err) => showMessage(`Error: ${err?.message ?? err}`));
+	};
+
 	document.getElementById('take_action')?.addEventListener('click', async (e) => {
+		if (document.getElementById('current_action')?.value === 'pgtidy') {
+			e.preventDefault();
+			tidyPGCode();
+			return;
+		}
+
 		const actionView = document.getElementById('view');
 		const editorForm = document.getElementById('editor');
 
diff --git a/lib/WeBWorK/ContentGenerator/Instructor/PGProblemEditor.pm b/lib/WeBWorK/ContentGenerator/Instructor/PGProblemEditor.pm
index 8a8f2dc3a1..2600999e38 100644
--- a/lib/WeBWorK/ContentGenerator/Instructor/PGProblemEditor.pm
+++ b/lib/WeBWorK/ContentGenerator/Instructor/PGProblemEditor.pm
@@ -96,6 +96,7 @@ the submit button pressed (the action).
         Make this set header for:  action = add_problem
         Revert:                    action = revert
         Generate Hardcopy:         action = hardcopy
+        Tidy Code:                 action = pgtidy
 
 An undefined or invalid action is interpreted as an initial edit of the file.
 
@@ -115,13 +116,14 @@ use WeBWorK::Utils::Instructor qw(assignProblemToAllSetUsers addProblemToSet);
 use constant DEFAULT_SEED => 123456;
 
 # Editor tabs
-use constant ACTION_FORMS => [qw(view hardcopy save save_as add_problem revert)];
+use constant ACTION_FORMS => [qw(view hardcopy pgtidy save save_as add_problem revert)];
 use constant ACTION_FORM_TITLES => {
 	view        => x('View/Reload'),
 	hardcopy    => x('Generate Hardcopy'),
-	add_problem => x('Append'),
+	pgtidy      => x('Tidy Code'),
 	save        => x('Save'),
 	save_as     => x('Save As'),
+	add_problem => x('Append'),
 	revert      => x('Revert'),
 };
 
@@ -778,9 +780,10 @@ sub view_handler ($c) {
 	return;
 }
 
-# The hardcopy action is handled by javascript.  This is provided just in case
-# something goes wrong and the action gets called.
+# The hardcopy and pgtidy actions are handled by javascript.  These are provided just in case
+# something goes wrong and the actions are called.
 sub hardcopy_action { }
+sub pgtidy_action   { }
 
 sub add_problem_handler ($c) {
 	my $db = $c->db;
diff --git a/lib/WeBWorK/CourseEnvironment.pm b/lib/WeBWorK/CourseEnvironment.pm
index afe0c9d502..ac1efeaeee 100644
--- a/lib/WeBWorK/CourseEnvironment.pm
+++ b/lib/WeBWorK/CourseEnvironment.pm
@@ -101,6 +101,11 @@ sub new {
 	my %ORIG_SIG;
 	$ORIG_SIG{$_} = $SIG{$_} for keys %SIG;
 
+	# The following line is a work around for a bug that occurs on some systems.  See
+	# https://rt.cpan.org/Public/Bug/Display.html?id=77916 and
+	# https://github.com/openwebwork/webwork2/pull/2098#issuecomment-1619812699.
+	%+;
+
 	my $safe = Safe->new;
 	$safe->permit('rand');
 	# seed course environment with initial values
diff --git a/lib/WebworkWebservice.pm b/lib/WebworkWebservice.pm
index f5f162d968..d6e6f68a23 100644
--- a/lib/WebworkWebservice.pm
+++ b/lib/WebworkWebservice.pm
@@ -268,6 +268,7 @@ sub command_permission {
 		putUserProblem    => 'modify_student_data',
 		putProblemVersion => 'modify_student_data',
 		putPastAnswer     => 'modify_student_data',
+		tidyPGCode        => 'access_instructor_tools',
 
 		# WebworkWebservice::RenderProblem
 		renderProblem => 'proctor_quiz_login',
diff --git a/lib/WebworkWebservice/ProblemActions.pm b/lib/WebworkWebservice/ProblemActions.pm
index ae51dc1866..8f80e35782 100644
--- a/lib/WebworkWebservice/ProblemActions.pm
+++ b/lib/WebworkWebservice/ProblemActions.pm
@@ -21,13 +21,11 @@ use warnings;
 
 use Data::Structure::Util qw(unbless);
 
-use WeBWorK::Debug;
+use WeBWorK::PG::Tidy qw(pgtidy);
 
 sub getUserProblem {
 	my ($invocant, $self, $params) = @_;
 
-	debug('in getUserProblem');
-
 	my $db = $self->db;
 
 	my $userProblem = $db->getUserProblem($params->{user_id}, $params->{set_id}, $params->{problem_id});
@@ -43,8 +41,6 @@ sub getUserProblem {
 sub putUserProblem {
 	my ($invocant, $self, $params) = @_;
 
-	debug('in putUserProblem');
-
 	my $db = $self->db;
 
 	my $userProblem = $db->getUserProblem($params->{user_id}, $params->{set_id}, $params->{problem_id});
@@ -75,8 +71,6 @@ sub putUserProblem {
 sub putProblemVersion {
 	my ($invocant, $self, $params) = @_;
 
-	debug('in putProblemVersion');
-
 	my $db = $self->db;
 
 	my $problemVersion =
@@ -108,8 +102,6 @@ sub putProblemVersion {
 sub putPastAnswer {
 	my ($invocant, $self, $params) = @_;
 
-	debug('in putPastAnswer');
-
 	my $db = $self->db;
 
 	my $pastAnswer = $db->getPastAnswer($params->{answer_id});
@@ -133,4 +125,21 @@ sub putPastAnswer {
 	};
 }
 
+sub tidyPGCode {
+	my ($invocant, $self, $params) = @_;
+
+	local @ARGV = ();
+
+	my $code = $params->{pgCode};
+	my $tidiedPGCode;
+	my $errors;
+
+	my $result = pgtidy(source => \$code, destination => \$tidiedPGCode, errorfile => \$errors);
+
+	return {
+		ra_out => { tidiedPGCode => $tidiedPGCode, status => $result, errors => $errors },
+		text   => 'Tidied code'
+	};
+}
+
 1;
diff --git a/templates/ContentGenerator/Instructor/PGProblemEditor/pgtidy_form.html.ep b/templates/ContentGenerator/Instructor/PGProblemEditor/pgtidy_form.html.ep
new file mode 100644
index 0000000000..c099b968d5
--- /dev/null
+++ b/templates/ContentGenerator/Instructor/PGProblemEditor/pgtidy_form.html.ep
@@ -0,0 +1,6 @@
+% # Hardcopy headers are previewed from the hardcopy generation tab.
+% last if $c->{file_type} eq 'course_info';
+%
+<div class="row">
+	<p><%= maketext('Reformat the code using perltidy.') =%></p>
+</div>
diff --git a/templates/HelpFiles/InstructorPGProblemEditor.html.ep b/templates/HelpFiles/InstructorPGProblemEditor.html.ep
index ebdf6d65dc..d7b5395cc6 100644
--- a/templates/HelpFiles/InstructorPGProblemEditor.html.ep
+++ b/templates/HelpFiles/InstructorPGProblemEditor.html.ep
@@ -120,6 +120,14 @@
 			. 'generating the PDF file using pdflatex.') =%>
 	</dd>
 
+	<dt><%= maketext('Tidy Code') %></dt>
+	<dd>
+		<%= maketext('Reformat the code using perltidy. This will change the code in the editor window, and save '
+			. 'changes to the temporary file. In some cases (if the code contains backslashes or double tildes) this '
+			. 'can result in odd spacing in the code. So make sure to inspect the formatted code, and edit further or '
+			. 'revert if needed.') =%>
+	</dd>
+
 	<dt><%= maketext('Save') %></dt>
 	<dd>
 		<%= maketext('Save the contents of the editor window to the file on disk and re-render the problem. If '