diff --git a/bin/copy-to-website.example b/bin/copy-to-website.example
index 1a2660a..dcff2d2 100755
--- a/bin/copy-to-website.example
+++ b/bin/copy-to-website.example
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-rsync --delete -avP *.png *.html ~/my.www.dir/html/graphs/
+rsync --delete -avP *.svg *.html ~/my.www.dir/html/graphs/
diff --git a/bin/diff-freq-graph b/bin/diff-freq-graph
index d4c1b2d..74625f2 100755
--- a/bin/diff-freq-graph
+++ b/bin/diff-freq-graph
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 (
-../bin/graph-header all-diff-freq.png "%1.1f us/s" "all clocks (diff freq)" "set yrange [-3:3]"
+../bin/graph-header all-diff-freq.svg "%1.1f us/s" "all clocks (diff freq)" "set yrange [-3:3]"
 ../bin/foreach-stat "'__FILE__' using 1:(\$6*1000000) title '__TITLE__' with line \\"
 echo 
 ) | gnuplot
diff --git a/bin/graph-header b/bin/graph-header
index 8a7197a..4234c6e 100755
--- a/bin/graph-header
+++ b/bin/graph-header
@@ -6,7 +6,7 @@ TITLE=$3
 CUSTOM=$4
 
 cat <<EOF
-set terminal png size 900,600
+set terminal svg size 900,600
 set xdata time
 set timefmt "%s"
 set output "$FILENAME"
diff --git a/bin/local-clock-graph b/bin/local-clock-graph
index f9792cb..048d06d 100755
--- a/bin/local-clock-graph
+++ b/bin/local-clock-graph
@@ -1,10 +1,10 @@
 #!/bin/sh
 
 gnuplot <<EOF
-set terminal png size 900,600
+set terminal svg size 900,600
 set xdata time
 set timefmt "%s"
-set output "local-clock.png"
+set output "local-clock.svg"
 set grid
 set xlabel "Time"
 set format x "%d-%H:%M"
@@ -27,10 +27,10 @@ ONE=`../bin/percentile 8 1 tracking.log | ../bin/mul 1000000`
 NF_M_F=`echo $NINETYFIVE - $FIVE | bc`
 NN_M_O=`echo $NINETYNINE - $ONE | bc`
 gnuplot <<EOF
-set terminal png size 900,600
+set terminal svg size 900,600
 set xdata time
 set timefmt "%s"
-set output "local-clock-stddev.png"
+set output "local-clock-stddev.svg"
 set grid
 set xlabel "Time"
 set format x "%d-%H:%M"
@@ -61,10 +61,10 @@ ONE=`../bin/percentile 4 1 tracking.log`
 NF_M_F=`echo $NINETYFIVE - $FIVE | bc`
 NN_M_O=`echo $NINETYNINE - $ONE | bc`
 gnuplot <<EOF
-set terminal png size 900,600
+set terminal svg size 900,600
 set xdata time
 set timefmt "%s"
-set output "local-clock-skew.png"
+set output "local-clock-skew.svg"
 set grid
 set xlabel "Time"
 set format x "%d-%H:%M"
diff --git a/bin/offset-graph b/bin/offset-graph
index 23948eb..a6d9cd8 100755
--- a/bin/offset-graph
+++ b/bin/offset-graph
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 (
-../bin/graph-header all-offset.png "%1.0f us" "all clocks (offset)" ""
+../bin/graph-header all-offset.svg "%1.0f us" "all clocks (offset)" ""
 ../bin/foreach-stat "'__FILE__' using 1:(\$4*1000000) title '__TITLE__' with line \\"
 echo 
 ) | gnuplot
@@ -17,7 +17,7 @@ else
 fi
 
 #(
-#  ../bin/graph-header remote-strat1.png "%1.0f us" "offset of remote strat1s" ""
+#  ../bin/graph-header remote-strat1.svg "%1.0f us" "offset of remote strat1s" ""
 #  i=0
 #  echo "$titles" | while read file title; do
 #    if [ $i != 0 ]; then
@@ -30,7 +30,7 @@ fi
 #) | gnuplot
 #
 #(
-#  ../bin/graph-header remote-strat1-downstream.png "%1.0f us" "offset-rtt/2 of remote strat1s" ""
+#  ../bin/graph-header remote-strat1-downstream.svg "%1.0f us" "offset-rtt/2 of remote strat1s" ""
 #  i=0
 #  echo "$titles" | while read file title; do
 #    measurements_file=`echo $file | sed 's/^statistics/measurements/'`
@@ -53,7 +53,7 @@ echo "$titles" | while read file title; do
     if [ -f $measurements_file ]; then
       FIFTY=`../bin/percentile 10 50 $measurements_file | ../bin/mul 1000000`
       CUSTOM="set label 1 gprintf('50%% = $FIFTY us',50) at graph 0.01,0.05 left front"
-      ../bin/graph-header remote-${imagename}.png "%1.0f us" "offset of $title" "$CUSTOM"
+      ../bin/graph-header remote-${imagename}.svg "%1.0f us" "offset of $title" "$CUSTOM"
       echo "'$measurements_file' using 1:(\$11*1000000) title 'offset' with line, \\"
       echo "'$measurements_file' using 1:((\$11+\$12/2)*1000000) title 'offset+rtt/2' with line, \\"
       echo "'$measurements_file' using 1:((\$11-\$12/2)*1000000) title 'offset-rtt/2' with line, \\"
@@ -61,7 +61,7 @@ echo "$titles" | while read file title; do
     else
       FIFTY=`../bin/percentile 3 50 $file | ../bin/mul 1000000`
       CUSTOM="set label 1 gprintf('50%% = $FIFTY us',50) at graph 0.01,0.05 left front"
-      ../bin/graph-header remote-${imagename}.png "%1.0f us" "offset of $title" "$CUSTOM"
+      ../bin/graph-header remote-${imagename}.svg "%1.0f us" "offset of $title" "$CUSTOM"
       echo "'$file' using 1:(\$4*1000000) title 'offset' with line, \\"
       echo "$FIFTY title '50th percentile'"
     fi
diff --git a/bin/plot b/bin/plot
index 1abd0c4..4cfae09 100755
--- a/bin/plot
+++ b/bin/plot
@@ -15,10 +15,10 @@ ONE=`../bin/percentile 3 1 tracking.log`
 NF_M_F=`echo $NINETYFIVE - $FIVE | bc`
 NN_M_O=`echo $NINETYNINE - $ONE | bc`
 gnuplot <<EOF
-set terminal png size 900,600
+set terminal svg size 900,600
 set xdata time
 set timefmt "%s"
-set output "percentiles.png"
+set output "percentiles.svg"
 set grid
 set xlabel "Time"
 set format x "%d-%H:%M"
@@ -49,10 +49,10 @@ ONE=`../bin/percentile 5 1 tracking.log | ../bin/mul 1000000`
 NF_M_F=`echo $NINETYFIVE - $FIVE | bc`
 NN_M_O=`echo $NINETYNINE - $ONE | bc`
 gnuplot <<EOF
-set terminal png size 900,600
+set terminal svg size 900,600
 set xdata time
 set timefmt "%s"
-set output "percentiles-offset.png"
+set output "percentiles-offset.svg"
 set grid
 set xlabel "Time"
 set format x "%d-%H:%M"
@@ -83,8 +83,8 @@ SEVENTYFIVE=`../bin/percentile 5 75 tracking.log | ../bin/mul 1000000`
 TWENTYFIVE=`../bin/percentile 5 25 tracking.log | ../bin/mul 1000000`
 
 gnuplot <<EOF
-set terminal png size 900,600
-set output "offset-histogram.png"
+set terminal svg size 900,600
+set output "offset-histogram.svg"
 set grid
 set xtic rotate by -45 scale 0
 set title "Local Clock Offsets - Histogram"
@@ -111,10 +111,10 @@ EOF
 
 # optional GPS tracking
 #gnuplot <<EOF
-#set terminal png size 900,600
+#set terminal svg size 900,600
 #set xdata time
 #set timefmt "%s"
-#set output "gps-lock.png"
+#set output "gps-lock.svg"
 #set grid
 #set xlabel "Time"
 #set format x "%d-%H:%M"
@@ -128,8 +128,8 @@ EOF
 #
 #../bin/histogram-snr <snr-history >snr-history.history
 #gnuplot <<EOF
-#set terminal png size 900,600
-#set output "gps-snr-histogram.png"
+#set terminal svg size 900,600
+#set output "gps-snr-histogram.svg"
 #set grid
 #set xtic rotate by -45 scale 0
 #set title "GPS SNR histogram"
@@ -141,10 +141,10 @@ EOF
 #
 #../bin/snr-hourly snr-history >snr-history.hourly
 #gnuplot <<EOF
-#set terminal png size 900,600
+#set terminal svg size 900,600
 #set xdata time
 #set timefmt "%s"
-#set output "gps-snr-hourly.png"
+#set output "gps-snr-hourly.svg"
 #set grid
 #set xlabel "Time"
 #set format x "%d-%H:%M"
diff --git a/bin/skew-graph b/bin/skew-graph
index 172a65f..a5874d2 100755
--- a/bin/skew-graph
+++ b/bin/skew-graph
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 (
-../bin/graph-header all-skew.png "%1.0f us/s" "all clocks (skew)" "set yrange [-10:10]"
+../bin/graph-header all-skew.svg "%1.0f us/s" "all clocks (skew)" "set yrange [-10:10]"
 ../bin/foreach-stat "'__FILE__' using 1:(\$6*1000000) title '__TITLE__' with line \\"
 echo 
 ) | gnuplot
diff --git a/runX/index.html.tmpl b/runX/index.html.tmpl
index 7a561d0..59a4d45 100644
--- a/runX/index.html.tmpl
+++ b/runX/index.html.tmpl
@@ -8,16 +8,16 @@
 <p>
 Last update - __TIME__ GMT
 </p>
-<img src="local-clock.png" alt="Local Clock: Frequency + Offset"><br>
-<img src="percentiles.png" alt="Local Clock: Frequency detail"><br>
-<img src="percentiles-offset.png" alt="Local Clock: Offset detail"><br>
-<img src="offset-histogram.png" alt="Local Clock: Offset histogram"><br>
-<img src="local-clock-skew.png" alt="Local Clock: Skew"><br>
-<img src="local-clock-stddev.png" alt="Local Clock: stddev"><br>
-<img src="all-diff-freq.png" alt="Remote Clocks: Frequency Difference"><br>
-<img src="all-offset.png" alt="Remote Clocks: Offsets"><br>
-<img src="all-skew.png" alt="Remote Clocks: Skew"><br>
-<img src="remote-statistics.SET_IP_HERE.png" alt="Remote Clock: SERVER_NAME"><br>
+<img src="local-clock.svg" alt="Local Clock: Frequency + Offset"><br>
+<img src="percentiles.svg" alt="Local Clock: Frequency detail"><br>
+<img src="percentiles-offset.svg" alt="Local Clock: Offset detail"><br>
+<img src="offset-histogram.svg" alt="Local Clock: Offset histogram"><br>
+<img src="local-clock-skew.svg" alt="Local Clock: Skew"><br>
+<img src="local-clock-stddev.svg" alt="Local Clock: stddev"><br>
+<img src="all-diff-freq.svg" alt="Remote Clocks: Frequency Difference"><br>
+<img src="all-offset.svg" alt="Remote Clocks: Offsets"><br>
+<img src="all-skew.svg" alt="Remote Clocks: Skew"><br>
+<img src="remote-statistics.SET_IP_HERE.svg" alt="Remote Clock: SERVER_NAME"><br>
 <pre>
 __RUN__ notes:
 __NOTES__