diff --git a/sidebar/stolen-data-cluster.tsx b/sidebar/stolen-data-cluster.tsx
index 35521c2..23c13f9 100644
--- a/sidebar/stolen-data-cluster.tsx
+++ b/sidebar/stolen-data-cluster.tsx
@@ -1,11 +1,7 @@
 import React from "react";
 import { getMemory } from "../memory";
 import { RequestCluster } from "../request-cluster";
-import {
-  MergedStolenDataEntry,
-  Sources,
-  StolenDataEntry,
-} from "../stolen-data-entry";
+import { MergedStolenDataEntry, Sources } from "../stolen-data-entry";
 
 import { hyphenate, useEmitter } from "../util";
 
@@ -19,33 +15,42 @@ function StolenDataValueTable({
   prefixKey: string;
 }) {
   return (
-    <table>
-      <tbody>
-        {Object.keys(entry.getParsedValues(prefixKey)[0]).map((key) => {
-          const subkey = `${prefixKey}.${key}`;
-          return (
-            <tr key={`${prefixKey}.${key}`}>
-              <th
-                onClick={(e) => {
-                  entry.toggleMark(subkey);
-                  e.stopPropagation();
-                }}
-                style={{
-                  border: entry.hasMark(subkey)
-                    ? "2px solid red"
-                    : "2px solid transparent",
-                }}
-              >
-                {hyphenate(key)}
-              </th>
-              <td>
-                <StolenDataValue entry={entry} prefixKey={subkey} />
-              </td>
-            </tr>
-          );
-        })}
-      </tbody>
-    </table>
+    <div>
+      {entry.getDecodingsApplied().includes("base64") ? (
+        <span style={{ color: "white", backgroundColor: "green" }}>
+          "base64"
+        </span>
+      ) : (
+        ""
+      )}
+      <table>
+        <tbody>
+          {Object.keys(entry.getParsedValues(prefixKey)[0]).map((key) => {
+            const subkey = `${prefixKey}.${key}`;
+            return (
+              <tr key={`${prefixKey}.${key}`}>
+                <th
+                  onClick={(e) => {
+                    entry.toggleMark(subkey);
+                    e.stopPropagation();
+                  }}
+                  style={{
+                    border: entry.hasMark(subkey)
+                      ? "2px solid red"
+                      : "2px solid transparent",
+                  }}
+                >
+                  {hyphenate(key)}
+                </th>
+                <td>
+                  <StolenDataValue entry={entry} prefixKey={subkey} />
+                </td>
+              </tr>
+            );
+          })}
+        </tbody>
+      </table>
+    </div>
   );
 }
 
diff --git a/stolen-data-entry.ts b/stolen-data-entry.ts
index 3b6b2b1..59af733 100644
--- a/stolen-data-entry.ts
+++ b/stolen-data-entry.ts
@@ -2,8 +2,10 @@ import { TCModel } from "@iabtcf/core";
 import { EventEmitter } from "events";
 import ExtendedRequest, { HAREntry } from "./extended-request";
 import Mark from "./mark";
+
 import {
   getshorthost,
+  isBase64JSON,
   isJSONObject,
   isURL,
   parseToObject,
@@ -29,12 +31,15 @@ const id = (function* id() {
   }
 })();
 
+export type DecodingSchema = "base64";
+
 export class StolenDataEntry extends EventEmitter {
   public isIAB = false;
   public iab: TCModel | null = null;
   public id: number;
   public marks: Mark[] = [];
   public classification: keyof typeof Classifications;
+  public decoding_applied: DecodingSchema = null;
 
   constructor(
     public request: ExtendedRequest,
@@ -50,6 +55,10 @@ export class StolenDataEntry extends EventEmitter {
     super();
     this.id = id.next().value as number;
     this.classification = this.classify();
+    if (isBase64JSON(value)) {
+      this.value = atob(value);
+      this.decoding_applied = "base64";
+    }
   }
 
   getPriority() {
@@ -291,4 +300,8 @@ export class MergedStolenDataEntry extends EventEmitter {
   toggleMark(key: string): void {
     this.entries.forEach((entry) => entry.toggleMark(key));
   }
+
+  getDecodingsApplied(): DecodingSchema[] {
+    return unique(this.entries.map((entry) => entry.decoding_applied));
+  }
 }
diff --git a/util.ts b/util.ts
index 4033755..07b0870 100644
--- a/util.ts
+++ b/util.ts
@@ -171,3 +171,15 @@ export function isSameURL(url1: string, url2: string): boolean {
   url2 = url2.replace(/^https?:\/\//, "").replace(/\/$/, "");
   return url1 === url2;
 }
+
+export function isBase64(s: string): boolean {
+  try {
+    atob(s);
+    return true;
+  } catch (e) {}
+  return false;
+}
+
+export function isBase64JSON(s: unknown): s is string {
+  return typeof s === "string" && isBase64(s) && isJSONObject(atob(s));
+}