diff --git a/.gitignore b/.gitignore
index f46ff07..a00c50a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 todo.org
 tools/*
 !tools/rewrite_goe_licenses.pl
+!tools/scramble_korapxml.pl
 build
 fixtures.txt
 node_modules
diff --git a/tools/scramble_korapxml.pl b/tools/scramble_korapxml.pl
new file mode 100644
index 0000000..48d6396
--- /dev/null
+++ b/tools/scramble_korapxml.pl
@@ -0,0 +1,242 @@
+#!/usr/bin/env perl
+use Mojo::Base -strict;
+use Mojo::DOM;
+use Mojo::File qw'path';
+use Mojo::ByteStream 'b';
+use String::Random;
+use Pod::Usage;
+use Getopt::Long qw/GetOptions :config no_auto_abbrev/;
+
+#############################################################
+# This helper tool iterates over a single KorAP-XML files   #
+# and randomizes all word strings occurring following       #
+# several rules. This is useful to create example files     #
+# based on corpora that can't be published.                 #
+# (c) IDS Mannheim                                          #
+#############################################################
+
+my %ERROR_HASH = (
+  -sections => 'NAME|SYNOPSIS',
+  -verbose  => 99,
+  -output   => '-',
+  -exit     => 1
+);
+
+my ($orig_folder, $scr_folder);
+GetOptions(
+  'input|i=s' => \$orig_folder,
+  'output|o=s' => \$scr_folder,
+  'help|h'      => sub {
+    pod2usage(
+      -sections => 'NAME|SYNOPSIS|DESCRIPTION|ARGUMENTS|OPTIONS',
+      -verbose  => 99,
+      -output   => '-'
+    );
+  }
+);
+
+unless ($orig_folder || $scr_folder) {
+  pod2usage(%ERROR_HASH);
+};
+
+my $string_gen = String::Random->new;
+
+# Remember all generated pairs orig -> random
+my %replacements = ();
+my $offset = 0;
+my @offsets = ();
+
+# Turn a word into a random word with similar characteristics
+sub get_rnd_word {
+  my $o_word = shift;
+  return $o_word unless $o_word =~ /[a-z]/i;
+
+  # Return the old replacement
+  if ($replacements{$o_word}) {
+    return $replacements{$o_word};
+  };
+
+  my $word = $o_word;
+
+  # Turn the word into a pattern for String::Random
+  # c: Any Latin lowercase character [a-z]
+  # C: Any Latin uppercase character [A-Z]
+  # n: Any digit [0-9]
+  # !: A punctuation character
+  $word =~ tr/ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzöäü1234567890~`!@$%^&*()-_+={}[]|\\:;"'.<>?\/#,/CCCCCCCCCCCCCCCCCCCCCCCCCCccccccccccccccccccccccccccccccnnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!/;
+  $word =~ s/[^Ccn!]/n/g;
+  $replacements{$o_word} = $string_gen->randpattern($word);
+}
+
+# 1. Load data.xml
+# replace all surface forms of /[a-z]/
+# with character strings of the same length, randomly created.
+# Create an array, accessible by offsets.
+my $data_file = $orig_folder . '/data.xml';
+# Process the data file and replace all surface words with random words
+my $data = Mojo::File->new($data_file)->slurp;
+my $dom = Mojo::DOM->new->xml(1)->parse(b($data)->decode);
+my $new_text = b($dom->at('text')->text)->split(
+  " "
+)->map(
+  sub {
+    my $token = get_rnd_word($_);
+    $offsets[$offset] = $token;
+    # print $offset, ':', $_, ':', $token,"\n";
+    $offset += length($token);
+    $offset++; # space
+
+    # exit if $offset > 300;
+    return $token;
+  }
+)->join(
+  " "
+);
+$dom->at('text')->content($new_text);
+
+# Create folder
+path($scr_folder)->make_path->child('data.xml')->spurt(b($dom->to_string)->encode);
+
+
+# 2. Take some css selectors and rename attributes,
+# either according to the surface form ("=") or
+# somehow derived ("^"), or random as well ("~"),
+# based on the given content, that can be randomized and
+# stuffed in a hash as well.
+# If no CSS rules are parsed, the file will just be copied.
+
+scramble('dgd/annot.xml' => [
+  ["f[name=trans]", "="],
+  ["f[name=lemma]", "^"],
+  ["f[name=pos]", "~"]
+] => 'dgd/annot.xml');
+
+scramble('struct/structure.xml');
+scramble('header.xml');
+
+# Scramble an annotation file
+sub scramble {
+  my ($input, $rules, $output) = @_;
+  my $data_file = path($orig_folder)->child($input);
+
+  unless (-f $data_file) {
+    warn "$data_file does not exist";
+    return;
+  };
+
+  my $data = $data_file->slurp;
+
+  # Only transfer if rules exist
+  if ($rules) {
+    my $dom = Mojo::DOM->new->xml(1)->parse(b($data)->decode);
+
+    foreach (@$rules) {
+      transform($dom, $_->[0], $_->[1]);
+    };
+
+    $data = b($dom->to_string)->encode;
+  }
+
+  else {
+
+    # Just copy the data
+    $output = $input;
+  };
+
+  my $file = Mojo::File->new($scr_folder)->child($output);
+  path($file->dirname)->make_path;
+  $file->spurt($data);
+};
+
+
+# Iterate over an annotation document and scramble
+# all textual content based on CSS rules
+sub transform {
+  my ($dom, $selector, $rule) = @_;
+
+  $dom->find("spanList > span")->each(
+    sub {
+      my $from = $_->attr("from");
+      my $to = $_->attr("to");
+      $_->find($selector)->each(
+        sub {
+          my $word = $_->text;
+
+          unless ($offsets[$from]) {
+            # warn '!!! Unknown word at ' . $from . '!';
+            $_->content('UNKN');
+            return;
+          };
+
+          # The derive rule means that the original
+          # word is taken and appended the string 'ui'
+          if ($rule eq '^') {
+            my $deriv = $offsets[$from];
+            chop($deriv);
+            chop($deriv);
+            $_->content($deriv . 'ui');
+
+          }
+
+          # The random rule means the word is replaced by
+          # with a random word with the same characterisms.
+          elsif ($rule eq '~') {
+            $_->content(get_rnd_word($word));
+          }
+
+          # Any other rule means, that the original word
+          # from the character data is taken.
+          else {
+            $_->content($offsets[$from])
+          }
+        }
+      )
+    }
+  )
+};
+
+__END__
+
+# Config data:
+{
+  '/dgd/annot.xml' => [
+    ["f[name=norm]", "="],
+    ["f[name=lemma]", "^"],
+    ["f[name=pos]", "~"]
+  ],
+  '/dgd/morpho.xml' => [
+    ["f[name=norm]", "="],
+    ["f[name=lemma]", "^"],
+    ["f[name=pos]", "~"]
+  ],
+  '/dgd/nospeech.xml' => []
+}
+
+
+__END__
+
+=pod
+
+=encoding utf8
+
+=head1 NAME
+
+scramble_korapxml.pl - Merge KorAP-XML data and create Krill documents
+
+
+=head1 SYNOPSIS
+
+  scramble_korapxml.pl -i <input-directory> -o <output-directory>
+
+
+=head1 DESCRIPTION
+
+This helper tool iterates over a single KorAP-XML folder
+and randomizes all word strings occurring following
+several rules. This is useful to create example files
+based on corpora that can't be published.
+
+Two identical words in a single run will always be transfered
+to the same target word.
+
+The C<data.xml> file will be scrambled automatically.