diff --git a/icons/icon.html b/icons/icon.html
index e890749..631cff4 100644
--- a/icons/icon.html
+++ b/icons/icon.html
@@ -1,5 +1,6 @@
 <!doctype html>
 <meta charset="utf-8">
 <title>icon</title>
-<style>html,body{margin:0;height:100%;background:#0b0b0e;overflow:hidden}img{display:block;width:100vmin;height:100vmin}</style>
-<img src="icon.svg" alt="">
+<style>html,body{margin:0;background:#0b0b0e;overflow:hidden}img{position:absolute;left:0;top:0;display:block}</style>
+<img id="i" src="icon.svg" alt="">
+<script>const s=+new URLSearchParams(location.search).get("s")||512;const i=document.getElementById("i");i.width=s;i.height=s;i.style.width=i.style.height=s+"px";</script>
diff --git a/tools/shots.sh b/tools/shots.sh
index fa00d77..6ac2d7d 100644
--- a/tools/shots.sh
+++ b/tools/shots.sh
@@ -22,14 +22,15 @@ until curl -fs -o /dev/null --max-time 2 "http://127.0.0.1:$PORT/"; do
   n=$((n + 1)); [ "$n" -lt 40 ] || { echo "the local server on port $PORT never answered" >&2; exit 1; }; sleep 0.5
 done
 
-# shoot <url> <WxH> <out>: one headless screenshot, waited for
+# shoot <url> <WxH> <out>: one headless screenshot, waited for. The icon page draws its own box at the top left,
+# so the crop is exact whatever viewport the runner's Chromium decides on.
 shoot() {
   prof=$(mktemp -d)
   rm -f "$3"
   # shellcheck disable=SC2086
   "$CHROME" --headless=new --hide-scrollbars --no-first-run --no-default-browser-check --disable-background-networking \
-    --disable-component-update --user-data-dir="$prof" --virtual-time-budget=6000 --window-size="$2" \
-    --screenshot="$3" ${CHROME_FLAGS:-} "$1" >"$prof.log" 2>&1 &
+    --disable-component-update --force-device-scale-factor=1 --user-data-dir="$prof" --virtual-time-budget=6000 \
+    --window-size="$2" --screenshot="$3" ${CHROME_FLAGS:-} "$1" >"$prof.log" 2>&1 &
   pid=$!
   n=0
   while kill -0 "$pid" 2>/dev/null && [ ! -s "$3" ]; do n=$((n + 1)); [ "$n" -lt 120 ] || break; sleep 0.5; done
@@ -42,6 +43,6 @@ shoot() {
 
 mkdir -p shots icons
 shoot "http://127.0.0.1:$PORT/" 1440,900 "$PWD/shots/desktop.png"
-shoot "http://127.0.0.1:$PORT/icons/icon.html" 512,512 "$PWD/icons/icon-512.png"
-shoot "http://127.0.0.1:$PORT/icons/icon.html" 192,192 "$PWD/icons/icon-192.png"
-shoot "http://127.0.0.1:$PORT/icons/icon.html" 180,180 "$PWD/icons/apple-touch-icon.png"
+shoot "http://127.0.0.1:$PORT/icons/icon.html?s=512" 512,512 "$PWD/icons/icon-512.png"
+shoot "http://127.0.0.1:$PORT/icons/icon.html?s=192" 192,192 "$PWD/icons/icon-192.png"
+shoot "http://127.0.0.1:$PORT/icons/icon.html?s=180" 180,180 "$PWD/icons/apple-touch-icon.png"