diff --git a/checker/Dockerfile b/checker/Dockerfile
new file mode 100644
index 00000000..54d995a3
--- /dev/null
+++ b/checker/Dockerfile
@@ -0,0 +1,2 @@
+FROM alpine
+RUN apk add perl perl-dbd-sqlite perl-file-slurp perl-yaml-libyaml perl-json
diff --git a/checker/check.pl b/checker/check.pl
new file mode 100755
index 00000000..5fd5a96f
--- /dev/null
+++ b/checker/check.pl
@@ -0,0 +1,63 @@
+#!/usr/bin/env perl
+
+use warnings;
+use strict;
+use Data::Dumper;
+
+my $DEBUG = 0;
+my $URL_BASE = 'https://www.selfdefined.app/definitions';
+
+use DBI;
+my $db = DBI->connect('DBI:SQLite:dbname=defs.db', '', '', { RaiseError => 1 })
+   or die $DBI::errstr;
+
+my $p_lookup = $db->prepare('SELECT word, ref FROM words WHERE word LIKE ?');
+my %words;
+sub lookup($) {
+    my $word = shift;
+    if($words{lc $word}) {
+        $words{lc $word}{count}++;
+        print STDERR $words{lc $word}{NO} ? '.' : '=' if $ENV{PROGRESS};
+        return;
+    }
+
+    my $res = $p_lookup->execute($word);
+    while (my $row = $p_lookup->fetchrow_hashref) {
+        $words{lc $word}{count}++;
+        $words{lc $row->{word}}{ref} = $row->{ref};
+        print STDERR '+' if $ENV{PROGRESS};
+        return;
+    }
+
+    $words{lc $word}{NO}++;
+    print STDERR '.' if $ENV{PROGRESS};
+}
+
+# Process input
+while(my $line = <>) {
+    foreach my $word (split(/\s+/, $line)) {
+        lookup($word);
+    }
+}
+
+# Report
+print join(',', qw(word count flag_level flag_text flag_for url)), "\n";
+my $p_word = $db->prepare('SELECT title, slug, flag_level, flag_text, flag_for FROM definitions WHERE title LIKE ?');
+foreach my $word (keys %words) {
+    next if $words{$word}{NO};
+    if($words{$word}{ref}) {
+        $p_word->execute($words{$word}{ref});
+    } else {
+        $p_word->execute($word);
+    }
+    my $row = $p_word->fetchrow_hashref();
+    printf "%s,%d,%s,%s,%s,${URL_BASE}/%s\n",
+        lc $word,
+        $words{$word}{count},
+        ($row->{flag_level} or ''),
+        ($row->{flag_text} or ''),
+        ($row->{flag_for} or ''),
+        $row->{slug}
+    ;
+
+}
\ No newline at end of file
diff --git a/checker/check.sh b/checker/check.sh
new file mode 100755
index 00000000..e9c5ce2f
--- /dev/null
+++ b/checker/check.sh
@@ -0,0 +1 @@
+elinks -dump "${1:?Need URL}" | perl check.pl
\ No newline at end of file
diff --git a/checker/defs2db.pl b/checker/defs2db.pl
new file mode 100644
index 00000000..684651e9
--- /dev/null
+++ b/checker/defs2db.pl
@@ -0,0 +1,91 @@
+#!/usr/bin/env perl
+
+use warnings;
+use strict;
+
+my $DEBUG = 0;
+my $SEPERATOR = '---';
+
+use File::Slurp qw(read_file);
+use YAML::Any qw(LoadFile Load);
+use DBI;
+use JSON;
+use Data::Dumper;
+
+sub _debug($;@) {
+    return unless $ENV{DEBUG} or $DEBUG;
+    my ($str, @params) = @_;
+    printf "DEBUG $str\n", @params;
+}
+
+sub getFrontMatter($) {
+    my $str = shift;
+    unless(index($str, $SEPERATOR) == 0) {
+        warn "Initial separator not found";
+        return undef;
+    }
+    my $next_seperator = index($str, $SEPERATOR, length($SEPERATOR));
+    return substr($str, length($SEPERATOR)+1, $next_seperator-length($SEPERATOR)-1);
+}
+
+my %fields;
+
+my $db = DBI->connect("DBI:SQLite:dbname=defs.db", '', '', { RaiseError => 1 })
+   or die $DBI::errstr;
+
+my $p_def = $db->prepare("
+    INSERT INTO definitions
+        (title, slug, defined, speech, skip_in_table_of_content, flag_level, flag_text, flag_for)
+        VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
+    );
+# my $p_flag = $db->prepare("INSERT INTO flags (title, level, text, for) VALUES (?, ?, ?, ?)");
+my $p_readings = $db->prepare("INSERT INTO readings (title, text, href) VALUES (?, ?, ?)");
+my $p_alt_words = $db->prepare("INSERT INTO alt_words (title, alt_word) VALUES (?, ?)");
+my $p_sub_terms = $db->prepare("INSERT INTO sub_terms (title, text, full_title) VALUES (?, ?, ?)");
+my $p_data = $db->prepare("INSERT INTO data (title, yaml, json) VALUES (?, ?, ?)");
+
+while(my $input = shift @ARGV) {
+    _debug("Parsing %s", $input);
+    my $input_data = read_file($input);
+    $input_data =~ s/\r//g;
+    my $fm_str = getFrontMatter($input_data);
+    my ($fm, @rest) = Load($fm_str);
+
+    $p_def->execute(
+        $fm->{title},
+        $fm->{slug},
+        ($fm->{defined} or 0),
+        ($fm->{speech} or 'unknown'),
+        ($fm->{skip_in_table_of_content} or '0'),
+        $fm->{flag}->{level},
+        $fm->{flag}->{text},
+        $fm->{flag}->{for},
+    );
+
+    foreach my $reading (@{$fm->{reading}}) {
+        $p_readings->execute(
+            $fm->{title},
+            $reading->{text},
+            $reading->{href},
+        );
+    }
+
+    foreach my $alt_word (@{$fm->{alt_words}}) {
+        $p_alt_words->execute(
+            $fm->{title},
+            $alt_word,
+        );
+    }
+
+    foreach my $sub_term (@{$fm->{sub_terms}}) {
+        $p_sub_terms->execute(
+            $fm->{title},
+            $sub_term->{text},
+            $sub_term->{full_title},
+        );
+    }
+
+    $p_data->execute($fm->{title}, $fm_str, encode_json($fm));
+}
+
+$db->disconnect;
\ No newline at end of file