diff --git a/src/libvterm/find-wide-chars.pl b/src/libvterm/find-wide-chars.pl
new file mode 100644
index 0000000..fc4a234
--- /dev/null
+++ b/src/libvterm/find-wide-chars.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Unicode::UCD qw( charprop );
+
+STDOUT->autoflush(1);
+
+sub iswide
+{
+   my ( $cp ) = @_;
+
+   my $width = charprop( $cp, "East_Asian_Width" ) or return;
+   return $width eq "Wide" || $width eq "Fullwidth";
+}
+
+my ( $start, $end );
+foreach my $cp ( 0 .. 0x1FFFF ) {
+   iswide($cp) or next;
+
+   if( defined $end and $end == $cp-1 ) {
+      # extend the range
+      $end = $cp;
+      next;
+   }
+
+   # start a new range
+   printf "  { %#04x, %#04x },\n", $start, $end if defined $start;
+
+   $start = $end = $cp;
+}
+
+printf "  { %#04x, %#04x },\n", $start, $end if defined $start;