diff --git a/pywb/vueui/src/components/PageRuler.vue b/pywb/vueui/src/components/PageRuler.vue
new file mode 100644
index 00000000..58233256
--- /dev/null
+++ b/pywb/vueui/src/components/PageRuler.vue
@@ -0,0 +1,151 @@
+<template>
+    <div class="ruler">
+      <div class="inner" :class="{hidden: !isShow}">
+        <div class="axis x" :style="{width: xAxisWidth}" ref="xAxis">
+          <div class="tick x" v-for="x in xTicks" >{{ x ? x : '' }}</div>
+          <div class="line x" v-if="xAxisLine" :style="{left: xAxisLine+'px'}"><span>{{xAxisLine}}</span></div>
+        </div>
+        <div class="axis y" :style="{height: yAxisHeight}" ref="yAxis">
+          <div class="tick y" v-for="y in yTicks">{{ y ? y : '' }}</div>
+          <div class="line y" v-if="yAxisLine" :style="{top: yAxisLine+'px'}"><span>{{yAxisLine}}</span></div>
+        </div>
+      </div>
+        <span class="toggle" @click="isShow=!isShow">R</span>
+    </div>
+</template>
+
+<style>
+.ruler {
+  position: fixed;
+  margin: 0;
+  padding: 0;
+  z-index: 90;
+}
+.ruler .inner.hidden { display: none; }
+
+  .ruler .toggle {
+    cursor: pointer;
+    z-index: 91;
+    position: fixed;
+    top: 0;
+    left: 0;
+  }
+  .ruler .line {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 10px;
+    height: 10px;
+  }
+  .ruler .line  span {
+    color: red;
+    font-weight: bold;
+    background-color: rgba(255,255,255,.9);
+  }
+
+  .ruler .tick {
+    font-size: 15px; line-height: 1;
+  }
+
+  .ruler .axis {
+    background-color: rgba(255,255,255,.9);
+    position: fixed;
+    top: 0;
+    left: 0;
+    white-space: nowrap;
+    overflow: visible;
+  }
+
+  .ruler .axis.x { height: 15px;}
+  .ruler .tick.x {
+    display: inline-block;
+    height: 15px;
+    width: 49px;
+    border-left: 1px solid black;
+  }
+  .ruler .axis.y { width: 15px; }
+  .ruler .tick.y {
+    display: block;
+    width: 15px;
+    height: 49px;
+    border-top: 1px solid black;
+  }
+  .ruler .line.x {
+    height: 100vh;
+    border-left: 1px solid red;
+  }
+  .ruler .line.y {
+    width: 100vw;
+    border-top: 1px solid red;
+  }
+</style>
+
+<script>
+export default {
+  data() {
+    return {
+      isShow: false,
+      xTicks: [],
+      xAxisLine: 0,
+      yTicks: [],
+      yAxisLine: 0,
+      increment: 50 //px
+    }
+  },
+  mounted() {
+    for (let i = 0; i < 100; i++) {
+      this.xTicks.push(i * this.increment);
+      this.yTicks.push(i * this.increment);
+    }
+
+    const onMouseMoveHandlerFn_ = (event) => {
+      if (event.currentTarget === this.$refs.xAxis) {
+        this.xAxisLine = event.x;
+        console.log(event.x);
+      } else if (event.currentTarget === this.$refs.yAxis) {
+        this.yAxisLine = event.y;
+        console.log(event.y);
+      }
+    };
+    const onMouseMoveHandlerFn = onMouseMoveHandlerFn_.bind(this);
+    const toggleHandlers = (event) => {
+      if (event.currentTarget === this.$refs.xAxis) {
+        if (this.$refs.xAxis.isGuidelineOn) {
+          this.$refs.xAxis.isGuidelineOn = false;
+          this.xAxisLine = 0;
+          this.$refs.xAxis.removeEventListener('mousemove', onMouseMoveHandlerFn, true);
+        } else {
+          this.$refs.xAxis.isGuidelineOn = true;
+          this.xAxisLine = event.x;
+          this.$refs.xAxis.addEventListener('mousemove', onMouseMoveHandlerFn, true);
+        }
+        event.stopPropagation();
+      } else if (event.currentTarget === this.$refs.yAxis) {
+        if (this.$refs.yAxis.isGuidelineOn) {
+          this.$refs.yAxis.isGuidelineOn = false;
+          this.yAxisLine = 0;
+          this.$refs.yAxis.removeEventListener('mousemove', onMouseMoveHandlerFn, true);
+        } else {
+          this.$refs.yAxis.isGuidelineOn = true;
+          this.yAxisLine = event.y;
+          this.$refs.yAxis.addEventListener('mousemove', onMouseMoveHandlerFn, true);
+        }
+        event.stopPropagation();
+      }
+    }
+
+    this.$refs.xAxis.addEventListener('click', toggleHandlers.bind(this), true);
+    this.$refs.yAxis.addEventListener('click', toggleHandlers.bind(this), true);
+  },
+  computed: {
+    yAxisHeight() {
+      return `${this.yTicks.length * this.increment}px`;
+    },
+    xAxisWidth() {
+      return `${this.xTicks.length * this.increment}px`;
+    }
+  },
+  methods: {
+  }
+};
+</script>