diff --git a/doc/UTIL_API.md b/doc/UTIL_API.md
index 2dc411e..ca50c7c 100644
--- a/doc/UTIL_API.md
+++ b/doc/UTIL_API.md
@@ -1300,6 +1300,27 @@ Checks if key is a direct property.
 has({one: 1}, 'one'); // -> true
 ```
 
+## highlight 
+
+Highlight code.
+
+|Name   |Type  |Desc                        |
+|-------|------|----------------------------|
+|str    |string|Code string                 |
+|lang=js|string|Language, js, html or css   |
+|[style]|object|Keyword highlight style     |
+|return |string|Highlighted html code string|
+
+Available styles:
+
+comment, string, number, keyword, operator
+
+```javascript
+highlight('const a = 5;', 'js', {
+    number: 'color:#0086b3;'
+}); // -> '<span style="color:#a71d5d;">const</span> a <span style="color:#994500;">=</span> <span style="color:#0086b3;">5</span>;'
+```
+
 ## identity 
 
 Return the first argument given.
@@ -2292,6 +2313,7 @@ Available options:
 |accessGetter=false|boolean|Access getter value      |
 |timeout=0         |number |Timeout of stringify     |
 |depth=0           |number |Max depth of recursion   |
+|[ignore]          |array  |Values to ignore         |
 
 When time is out, all remaining values will all be "Timeout".
 
diff --git a/src/lib/JsonViewer.js b/src/lib/JsonViewer.js
index 3125bdb..46ad864 100644
--- a/src/lib/JsonViewer.js
+++ b/src/lib/JsonViewer.js
@@ -2,7 +2,6 @@ import {
   evalCss,
   $,
   startWith,
-  isArr,
   isObj,
   uniqId,
   upperFirst,
@@ -26,7 +25,11 @@ export default class JsonViewer {
     evalCss(require('./json.scss'))
 
     if (isObj(data) && isUndef(data.type) && isUndef(data.id)) {
-      data = JSON.parse(stringifyAll(data))
+      data = JSON.parse(
+        stringifyAll(data, {
+          ignore: [Object.prototype]
+        })
+      )
     }
 
     this._data = {
@@ -67,33 +70,24 @@ export default class JsonViewer {
     return ret
   }
   createEl(key, val, keyType, firstLevel = false) {
-    let type = 'object'
+    let type = typeof val
     let id
 
-    if (isArr(val)) type = 'array'
-
-    function wrapKey(key) {
-      if (firstLevel) return ''
-      if (isObj(val) && val.jsonSplitArr) return ''
-
-      let keyClass = 'eruda-key'
-      if (
-        keyType === 'unenumerable' ||
-        keyType === 'proto' ||
-        keyType === 'symbol'
-      ) {
-        keyClass = 'eruda-key-lighter'
-      }
-
-      return `<span class="${keyClass}">${encode(key)}</span>: `
-    }
-
     if (val === null) {
       return `<li>${wrapKey(key)}<span class="eruda-null">null</span></li>`
-    } else if (val.type === 'Number' || isNum(val) || isBool(val)) {
-      return `<li>${wrapKey(key)}<span class="eruda-${typeof val}">${encode(
+    } else if (isNum(val) || isBool(val)) {
+      return `<li>${wrapKey(key)}<span class="eruda-${type}">${encode(
         val
       )}</span></li>`
+    }
+
+    if (val.type === 'RegExp') type = 'regexp'
+    if (val.type === 'Number') type = 'number'
+
+    if (val.type === 'Number' || val.type === 'RegExp') {
+      return `<li>${wrapKey(key)}<span class="eruda-${type}">${encode(
+        val.value
+      )}</span></li>`
     } else if (val.type === 'Undefined' || val.type === 'Symbol') {
       return `<li>${wrapKey(key)}<span class="eruda-special">${lowerCase(
         val.type
@@ -124,6 +118,22 @@ export default class JsonViewer {
       return obj + '</ul><span class="eruda-close"></span></li>'
     }
 
+    function wrapKey(key) {
+      if (firstLevel) return ''
+      if (isObj(val) && val.jsonSplitArr) return ''
+
+      let keyClass = 'eruda-key'
+      if (
+        keyType === 'unenumerable' ||
+        keyType === 'proto' ||
+        keyType === 'symbol'
+      ) {
+        keyClass = 'eruda-key-lighter'
+      }
+
+      return `<span class="${keyClass}">${encode(key)}</span>: `
+    }
+
     return `<li>${wrapKey(key)}<span class="eruda-${typeof val}">"${encode(
       val
     )}"</span></li>`
diff --git a/src/lib/json.scss b/src/lib/json.scss
index 4c7dd09..ed6388c 100644
--- a/src/lib/json.scss
+++ b/src/lib/json.scss
@@ -36,7 +36,8 @@
   .null {
     color: #0086b3;
   }
-  .string {
+  .string,
+  .regexp {
     color: #183691;
   }
   .number {