diff --git a/toys/README b/toys/README
index 9b7785b..d3d7af9 100644
--- a/toys/README
+++ b/toys/README
@@ -14,3 +14,24 @@ AtOM).
 
 Options:
 	-r:	remove unwanted files.
+
+missingtags
+===========
+Checks for files which don't have the specified tags set.
+
+Options:
+	-A:	Album artist
+	-l:	Album
+	-a:	Artist
+	-c:	Composer
+	-d:	Disc
+	-g:	Genre
+	-p:	Performer
+	-t:	Title
+	-n:	Track number
+	-N:	Track total
+	-y:	Year
+
+	-u:	Update database first
+	-D:	Debug
+
diff --git a/toys/missingtags b/toys/missingtags
new file mode 100755
index 0000000..4c6c6de
--- /dev/null
+++ b/toys/missingtags
@@ -0,0 +1,186 @@
+#!/bin/bash
+
+# config structures
+declare -A			\
+	destinationchannels	\
+	destinationfat32compat	\
+	destinationcopymime	\
+	destinationformat	\
+	destinationfrequency	\
+	destinationid		\
+	destinationloss		\
+	destinationmaxbps	\
+	destinationnormalize	\
+	destinationpath		\
+	destinationquality	\
+	destinationrename	\
+	destinationnoresample	\
+	destinationrenamepath	\
+	destinationskipmime	\
+	checks			\
+|| {
+	echo "Check your Bash version. You need >= 4.0" >&2
+	exit $EBASHVERS
+}
+
+declare -r				\
+	DOCDIR=./doc			\
+	LIBDIR=./lib			\
+	SHAREDIR=./share
+declare -r				\
+	exampleconf=$DOCDIR/example.cfg	\
+	schema=$SHAREDIR/schema.sql	\
+					\
+	oldIFS="$IFS"
+
+cffile="$HOME/.atom/atom.cfg"
+LC_ALL=C
+
+shopt -s extglob
+
+for function in "$LIBDIR"/*/*
+do
+	source "$function"
+done
+
+while getopts 'AlacdgptnNyuD' opt
+do
+	case $opt in
+		A)	checks[albumartist]=1	;;
+		l)	checks[album]=1		;;
+		a)	checks[artist]=1	;;
+		c)	checks[composer]=1	;;
+		d)	checks[disc]=1		;;
+		g)	checks[genre]=1		;;
+		p)	checks[performer]=1	;;
+		t)	checks[title]=1		;;
+		n)	checks[track]=1		;;
+		N)	checks[tracktotal]=1	;;
+		y)	checks[year]=1		;;
+
+		u)	update=1		;;
+		D)	(( debug++ ))		;;
+	esac
+done
+
+(( ${#checks[@]} )) || {
+	cat >&2 <<-EOHelp
+		No check specified!
+		    -A Album artist
+		    -l Album
+		    -a Artist
+		    -c Composer
+		    -d Disc
+		    -g Genre
+		    -p Performer
+		    -t Title
+		    -n Track number
+		    -N Track total
+		    -y Year
+
+		Other options:
+		    -u Update database first
+		    -D Debug
+	EOHelp
+	exit 1
+}
+
+getConfig
+
+openDatabase
+
+if (( update ))
+then
+	getFiles
+	updateMimes
+fi
+
+for check in ${!checks[@]}
+do
+	case $check in
+		albumartist)
+			cat >&2 <<-EONotice
+				Album artist is not supported for ID3. Files in this format will be ignored by
+				this check (other checks still apply).
+			EONotice
+			mimemp3=$(
+				Select mime_types id <<<"mime_text = audio/mpeg"
+			)
+			whereclause+="${whereclause+ OR }("
+			whereclause+='tags.albumartist IS NULL '
+			whereclause+="AND NOT tags.tagreader LIKE \"ID3-%\""
+			whereclause+=')'
+		;;
+		tracktotal)
+			whereclause+="${whereclause+ OR }NOT tags.track LIKE \"%/%\""
+		;;
+		*)
+			whereclause+="${whereclause+ OR }tags.$check IS NULL"
+		;;
+	esac
+	whereclause+='
+'
+done
+
+cat >&3 <<-EOSelect
+	SELECT	source_files.filename,
+		tags.genre,
+		tags.albumartist,
+		tags.year,
+		tags.album,
+		tags.disc,
+		tags.artist,
+		tags.track,
+		tags.title,
+		tags.composer,
+		tags.performer
+	FROM			tags
+		INNER JOIN	source_files
+			ON	tags.source_file=source_files.id
+	WHERE	$whereclause
+	AND NOT	tags.tagreader LIKE "unknown-%";
+
+	SELECT	"AtOM:NoMoreFiles";
+EOSelect
+
+read -u4 line
+until [[ $line == AtOM:NoMoreFiles ]]
+do
+	lines+=( "$line" )
+	read -u4 line
+done
+
+for line in "${lines[@]}"
+do
+	missing=()
+	filename=${line%%|*}
+	rest="${line#*|}|"
+	(( ${checks[genre]} )) && [ -z "${rest%%|*}" ] && missing+=( "Genre" )
+	rest=${rest#*|}
+	(( ${checks[albumartist]} )) && [ -z "${rest%%|*}" ] && missing+=( "AlbumArtist" )
+	rest=${rest#*|}
+	(( ${checks[year]} )) && [ -z "${rest%%|*}" ] && missing+=( "Year" )
+	rest=${rest#*|}
+	(( ${checks[album]} )) && [ -z "${rest%%|*}" ] && missing+=( "Album" )
+	rest=${rest#*|}
+	(( ${checks[disc]} )) && [ -z "${rest%%|*}" ] && missing+=( "Disc" )
+	rest=${rest#*|}
+	(( ${checks[artist]} )) && [ -z "${rest%%|*}" ] && missing+=( "Artist" )
+	rest=${rest#*|}
+	track=${rest%%|*}
+	(( ${checks[track]} )) && [ -z "$track" ] && missing+=( "Track" )
+	if (( ${checks[tracktotal]} )) && ! [[ $track =~ / ]]
+	then
+		missing+=( TrackTotal )
+	fi
+	rest=${rest#*|}
+	(( ${checks[title]} )) && [ -z "${rest%%|*}" ] && missing+=( "Title" )
+	rest=${rest#*|}
+	(( ${checks[composer]} )) && [ -z "${rest%%|*}" ] && missing+=( "Composer" )
+	rest=${rest#*|}
+	(( ${checks[performer]} )) && [ -z "${rest%%|*}" ] && missing+=( "Performer" )
+	rest=${rest#*|}
+	echo "$filename: ${missing[@]}"
+done
+
+closeDatabase