diff --git a/README.md b/README.md
index 1ffa0129..b22c52de 100644
--- a/README.md
+++ b/README.md
@@ -248,9 +248,11 @@ A similar callback is executed whenever an item is copied to the clipboard (if p
     type        // Either "path" or "value" depending on whether "Cmd/Ctrl" was pressed 
     stringValue // A nicely stringified version of `value`  
                 // (i.e. what the clipboard actually receives)
+    success     // true/false -- whether clipboard copy action actually succeeded
+    errorMessage// Error detail if success === false
 ```
 
-Since there is very little user feedback when clicking "Copy", a good idea would be to present some kind of notification in this callback.
+Since there is very little user feedback when clicking "Copy", a good idea would be to present some kind of notification in this callback. There are situations (such as an insecure environment) where the browser won't actually permit any clipboard actions. In this case, the `success` property will be `false`, so you can handle it appropriately.
 
 ### Custom Buttons
 
diff --git a/demo/src/App.tsx b/demo/src/App.tsx
index 55af2290..6fd60a17 100644
--- a/demo/src/App.tsx
+++ b/demo/src/App.tsx
@@ -363,14 +363,23 @@ function App() {
               }
               enableClipboard={
                 allowCopy
-                  ? ({ stringValue, type }) =>
-                      toast({
-                        title: `${type === 'value' ? 'Value' : 'Path'} copied to clipboard:`,
-                        description: truncate(String(stringValue)),
-                        status: 'success',
-                        duration: 5000,
-                        isClosable: true,
-                      })
+                  ? ({ stringValue, type, success, errorMessage }) => {
+                      success
+                        ? toast({
+                            title: `${type === 'value' ? 'Value' : 'Path'} copied to clipboard:`,
+                            description: truncate(String(stringValue)),
+                            status: 'success',
+                            duration: 5000,
+                            isClosable: true,
+                          })
+                        : toast({
+                            title: 'Problem copying to clipboard',
+                            description: errorMessage,
+                            status: 'error',
+                            duration: 5000,
+                            isClosable: true,
+                          })
+                    }
                   : false
               }
               restrictEdit={restrictEdit}
diff --git a/src/ButtonPanels.tsx b/src/ButtonPanels.tsx
index 3b6ecb57..01a0ef94 100644
--- a/src/ButtonPanels.tsx
+++ b/src/ButtonPanels.tsx
@@ -10,6 +10,7 @@ import {
   type NodeData,
   type CustomButtonDefinition,
   type KeyboardControlsFull,
+  type JsonData,
 } from './types'
 import { getModifier } from './helpers'
 
@@ -67,8 +68,10 @@ export const EditButtons: React.FC<EditButtonProps> = ({
   const handleCopy = (e: React.MouseEvent<HTMLElement>) => {
     e.stopPropagation()
     let copyType: CopyType = 'value'
-    let value
+    let value: JsonData
     let stringValue = ''
+    let success: boolean
+    let errorMessage: string | null = null
     if (enableClipboard) {
       const modifier = getModifier(e)
       if (modifier && keyboardControls.clipboardModifier.includes(modifier)) {
@@ -79,10 +82,39 @@ export const EditButtons: React.FC<EditButtonProps> = ({
         value = data
         stringValue = type ? JSON.stringify(data, null, 2) : String(value)
       }
-      void navigator.clipboard?.writeText(stringValue)
-      if (typeof enableClipboard === 'function') {
-        enableClipboard({ value, stringValue, path, key, type: copyType })
+      if (!navigator.clipboard) {
+        if (typeof enableClipboard === 'function')
+          enableClipboard({
+            success: false,
+            value,
+            stringValue,
+            path,
+            key,
+            type: copyType,
+            errorMessage: "Can't access clipboard API",
+          })
+        return
       }
+      navigator.clipboard
+        ?.writeText(stringValue)
+        .then(() => (success = true))
+        .catch((err) => {
+          success = false
+          errorMessage = err.message
+        })
+        .finally(() => {
+          if (typeof enableClipboard === 'function') {
+            enableClipboard({
+              success,
+              errorMessage,
+              value,
+              stringValue,
+              path,
+              key,
+              type: copyType,
+            })
+          }
+        })
     }
   }
 
diff --git a/src/types.ts b/src/types.ts
index a67d298f..5c905811 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -139,6 +139,8 @@ export type SearchFilterInputFunction = (
 
 export type CopyType = 'path' | 'value'
 export type CopyFunction = (input: {
+  success: boolean
+  errorMessage: string | null
   key: CollectionKey
   path: CollectionKey[]
   value: unknown
@@ -208,7 +210,7 @@ export interface NodeData {
   path: CollectionKey[]
   level: number
   index: number
-  value: unknown
+  value: JsonData
   size: number | null
   parentData: object | null
   fullData: JsonData