diff --git a/README.md b/README.md
index 97e72f5..d20a7b1 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,9 @@ You need to have ghoscript installed on your machine.
 ```
 git clone https://gitea.auro.re/otthorn/pdf-optimize
 cd pdf-optimize
-chmod +x pdf-optimize.sh
+chmod +x pdf-optimize
 sudo mkdir -p /opt/bin/
-sudo cp pdf-optimize.sh /opt/bin/pdf-optimize
+sudo cp pdf-optimize /opt/bin/
 ```
 
 Don't forget to add `/opt/bin` to your `PATH`.
diff --git a/pdf-optimize b/pdf-optimize
index d2bd9b5..93833c8 100755
--- a/pdf-optimize
+++ b/pdf-optimize
@@ -17,132 +17,146 @@
 
 function usage
 {
-	echo "usage: pdf-optimize [options] input.pdf"
-	echo "    ";
-	echo "  -o | --output           : output filename";
-	echo "  -q | --quiet            : run quietly";
-	echo "  -v | --verbose          : run verbosly";
-	echo "  -y | --yes-to-replace   : yes to replace existing files";
-	echo "  -h | --help             : print this message";
-	echo "    ";
-	echo "If no output path is specified, given input.pdf as input will output
+    echo "usage: pdf-optimize [options] input.pdf"
+    echo "    ";
+    echo "  -a | --archive          : archive mode (PDF/A)";
+    echo "  -c | --compatibility    : compability more with PDF 1.4";
+    echo "  -h | --help             : print this message";
+    echo "  -k | --quality          : choose quality profile from:
+                             * 1 HIGH QUALITY [default]
+                             * 2 LOW QUALITY
+                             * 3 AGGRESSIVE
+                             * 4 VERY AGGRESIVE";
+    echo "  -o | --output           : output filename";
+    echo "  -q | --quiet            : run quietly";
+    echo "  -v | --verbose          : run verbosly";
+    echo "  -y | --yes-to-replace   : yes to replace existing files";
+    echo "    ";
+    echo "If no output path is specified, given input.pdf as input will output
 input_compressed.pdf"
 }
 
 function arg_parse
 {
-	# if no argument is given print help
-	if [[ -z "$1" ]]; then
-		usage; exit;
-	fi
+    # if no argument is given print help
+    if [[ -z "$1" ]]; then
+        usage; exit;
+    fi
 
-	# positional arguments
-	args=()
+    # positional arguments
+    args=()
 
-	while [ "$1" != "" ]; do
-		case "$1" in
-			-o | --output )           output_path="$2";  shift;;
-			-q | --quiet )            quiet=1;;
-			-v | --verbose )          verbose=1;;
-			-y | --yes-to-replace )   replace=1;;
-			-h | --help )             usage;             exit;;
-			* )                       args+=("$1")
-		esac
-		shift
-	done
+    while [ "$1" != "" ]; do
+        case "$1" in
+            -k | --quality )          quality="$2";      shift;; 
+            -o | --output )           output_path="$2";  shift;;
+            -a | --archive )          archive=1;;
+            -c | --compatibility )    compatibility=1;;
+            -q | --quiet )            quiet=1;;
+            -v | --verbose )          verbose=1;;
+            -y | --yes-to-replace )   replace=1;;
+            -h | --help )             usage;             exit;;
+            * )                       args+=("$1")
+        esac
+        shift
+    done
 
-	# restore positional argument
-	set -- "${args[@]}"
+    # restore positional argument
+    set -- "${args[@]}"
 
-	# only the first one should be used
-	input_path="${args[0]}"
+    # only the first one should be used
+    input_path="${args[0]}"
 
-	# add default output path if none is given
-	if [[ -z "$output_path" ]]; then
-		output_path="${input_path%.*}_compressed.pdf";
-	fi
+    # add default output path if none is given
+    if [[ -z "$output_path" ]]; then
+        output_path="${input_path%.*}_compressed.pdf";
+    fi
 
-	# check if the output file already exists before writting to it
-	if [[ -f "$output_path" && "$replace" == 0 ]]; then
-		yes_or_no "$output_path already exists, do you want to replace it?" ||
-			exit 1;
-	fi
+    # check if the output file already exists before writting to it
+    if [[ -f "$output_path" && "$replace" == 0 ]]; then
+        yes_or_no "$output_path already exists, do you want to replace it?" ||
+            exit 1;
+    fi
 
-	# check if the input file exists
-	if [[ ! -f "$input_path" ]]; then
-		echo "$input_path does not exist."
-		echo "Aborting";
-		exit 1;
-	fi
+    # check if the input file exists
+    if [[ ! -f "$input_path" ]]; then
+        echo "$input_path does not exist."
+        echo "Aborting";
+        exit 1;
+    fi
 }
 
 function yes_or_no
 {
-	read -p "$* [y/N]: " ans
-	case "$ans" in
-		[yY] | [yY]es )     return 0;;
-		* )                 echo "Aborting"; return 1;;
-	esac
+    read -p "$* [y/N]: " ans
+    case "$ans" in
+        [yY] | [yY]es )     return 0;;
+        * )                 echo "Aborting"; return 1;;
+    esac
 }
 
 function run
 {
-	arg_parse "$@";
-	
-	# print general information
-	if [[ "$quiet" != 1 ]]; then
-		echo "Compressing from ${bold}$input_path${normal} into \
+    arg_parse "$@";
+    
+    # print general information
+    if [[ "$quiet" != 1 ]]; then
+        echo "Compressing from ${bold}$input_path${normal} into \
 ${bold}$output_path${normal}."
-	fi
+    fi
 
-	# run the compression using ghostscript
-	if [[ "$verbose" != 1 ]]; then
-		ghostscript -sDEVICE=pdfwrite \
-		   -dCompatibilityLevel=1.4 \
-		   -dPDFSETTINGS=/prepress \
-		   -dNOPAUSE \
-		   -dQUIET \
-		   -dBATCH \
-		   -sOutputFile=$output_path \
-		   $input_path
-	else
-		echo "input_path=$input_path";
-		echo "output_path=$output_path";
-		echo "quiet=$quiet";
-		echo "verbose=$verbose";
-		echo "replace=$replace";
-		echo "    ";
-		ghostscript -sDEVICE=pdfwrite \
-		   -dCompatibilityLevel=1.4 \
-		   -dPDFSETTINGS=/prepress \
-		   -dNOPAUSE \
-		   -dBATCH \
-		   -sOutputFile=$output_path \
-		   $input_path 
-	fi
-	
-	# catching errors
-	if [[ "$?" != 0 ]]; then
-		echo "Something went wrong with ghostscript.";
-		echo "Aborting.";
-		exit 1;
-	fi
+    # define the base command
+    base_command="
+        gs -sDEVICE=pdfwrite \
+           -dPDFSETTINGS=/prepress \
+           -dNOPAUSE \
+           -dBATCH ";
 
-	# compute the compresion rate
-	if [[ "$quiet" != 1 ]]; then
-		compute_compression;
-	fi
+    # add compatibilty
+    if [[ "$compatibility" == 1 ]]; then
+        base_command+="-dCompatibilityLevel=1.4 ";
+    fi
+
+    # ask ghostsript to be quiet
+    if [[ "$verbose" == 1 ]]; then
+        base_command+="-dQUIET ";
+    fi
+    
+    # add archive mode option
+    if [[ "$archive" == 1 ]]; then
+        base_command+="-dPDFA=2 -dPDFACompatibilityPolicy=1 "
+    fi
+
+    # add input and ouput paths
+    base_command+="-sOutputFile=$output_path \
+           $input_path"
+
+    # run command
+    echo $base_command;
+    #eval $base_command;
+
+    # catching errors
+    if [[ "$?" != 0 ]]; then
+        echo "Something went wrong with ghostscript.";
+        echo "Aborting.";
+        exit 1;
+    fi
+
+    # compute the compresion rate
+    if [[ "$quiet" != 1 ]]; then
+        #compute_compression;
+    fi
 }
 
 function compute_compression
 {
-	input_size=`du "$input_path" | cut -f1`
-	output_size=`du "$output_path" | cut -f1`
-	percentage=`echo "scale=1;$output_size / $input_size * 100" | bc -l`
-	input_size_h=`du -h "$input_path" | cut -f1`
-	output_size_h=`du -h "$output_path" | cut -f1`
+    input_size=`du "$input_path" | cut -f1`
+    output_size=`du "$output_path" | cut -f1`
+    percentage=`echo "scale=1;$output_size / $input_size * 100" | bc -l`
+    input_size_h=`du -h "$input_path" | cut -f1`
+    output_size_h=`du -h "$output_path" | cut -f1`
 
-	echo "Size reduced from ${bold}$input_size_h${normal} to \
+    echo "Size reduced from ${bold}$input_size_h${normal} to \
 ${bold}$output_size_h${normal} [$percentage %]"
 }