diff --git a/src/web/html/index.html b/src/web/html/index.html
index 5c3c3263..4eab3f28 100755
--- a/src/web/html/index.html
+++ b/src/web/html/index.html
@@ -223,22 +223,22 @@
                             <label for="input-text">Input</label>
                             <span class="pane-controls">
                                 <div class="io-info" id="input-files-info"></div>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="btn-new-tab" data-toggle="tooltip" title="Add a new input tab" data-help-title="Tabs" data-help="<p>New tabs can be created to support multiple Inputs. These tabs have their own associated character encodings and EOL separators, as defined in their status bars.</p><p>The deep link in the URL bar only contains information about the currently active tab.</p>">
-                                    <i class="material-icons">add</i>
+                                <button type="button" aria-label="Add new input tab" class="btn btn-primary bmd-btn-icon" id="btn-new-tab" data-toggle="tooltip" title="Add a new input tab" data-help-title="Tabs" data-help="<p>New tabs can be created to support multiple Inputs. These tabs have their own associated character encodings and EOL separators, as defined in their status bars.</p><p>The deep link in the URL bar only contains information about the currently active tab.</p>">
+                                    <i class="material-icons" aria-hidden="true">add</i>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="btn-open-folder" data-toggle="tooltip" title="Open folder as input" data-help-title="Opening a folder" data-help="<p>You can open a whole folder into CyberChef, which will result in each file being loaded into a separate Input tab.</p><p>CyberChef can handle lots of Input files, but be aware that performance may suffer, especially if the files are large in size.</p><p>Folders can also be loaded by dragging them over the Input pane and dropping them.</p>">
-                                    <i class="material-icons">folder_open</i>
+                                <button type="button" aria-label="Open folder as input" class="btn btn-primary bmd-btn-icon" id="btn-open-folder" data-toggle="tooltip" title="Open folder as input" data-help-title="Opening a folder" data-help="<p>You can open a whole folder into CyberChef, which will result in each file being loaded into a separate Input tab.</p><p>CyberChef can handle lots of Input files, but be aware that performance may suffer, especially if the files are large in size.</p><p>Folders can also be loaded by dragging them over the Input pane and dropping them.</p>">
+                                    <i class="material-icons" aria-hidden="true">folder_open</i>
                                     <input type="file" id="open-folder" style="display: none" multiple directory webkitdirectory>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="btn-open-file" data-toggle="tooltip" title="Open file as input" data-help-title="Opening a file" data-help="<p>Files can be loaded into CyberChef individually or in groups, either using the 'Open file as input' button, or by dragging and dropping them over the Input pane.</p><p>CyberChef can handle reasonably large files (at least 500MB, depending on hardware), but performance may be impacted and some Operations will run very slowly over large Inputs.</p>">
-                                    <i class="material-icons">input</i>
+                                <button type="button" aria-label="Open file as input" class="btn btn-primary bmd-btn-icon" id="btn-open-file" data-toggle="tooltip" title="Open file as input" data-help-title="Opening a file" data-help="<p>Files can be loaded into CyberChef individually or in groups, either using the 'Open file as input' button, or by dragging and dropping them over the Input pane.</p><p>CyberChef can handle reasonably large files (at least 500MB, depending on hardware), but performance may be impacted and some Operations will run very slowly over large Inputs.</p>">
+                                    <i class="material-icons" aria-hidden="true">input</i>
                                     <input type="file" id="open-file" style="display: none" multiple>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="clr-io" data-toggle="tooltip" title="Clear input and output" data-help-title="Clearing the Input and Output" data-help="Clicking the 'Clear input and output' button will remove all Inputs and Outputs. It will not clear the Recipe.">
-                                    <i class="material-icons">delete</i>
+                                <button type="button" aria-label="Clear input and output" class="btn btn-primary bmd-btn-icon" id="clr-io" data-toggle="tooltip" title="Clear input and output" data-help-title="Clearing the Input and Output" data-help="Clicking the 'Clear input and output' button will remove all Inputs and Outputs. It will not clear the Recipe.">
+                                    <i class="material-icons" aria-hidden="true">delete</i>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="reset-layout" data-toggle="tooltip" title="Reset pane layout" data-help-title="Resetting the pane layout" data-help="CyberChef's panes can be resized to suit your area of focus. This button will reset the pane sizes to their default configuration.">
-                                    <i class="material-icons">view_compact</i>
+                                <button type="button" aria-label="Reset pane layout" class="btn btn-primary bmd-btn-icon" id="reset-layout" data-toggle="tooltip" title="Reset pane layout" data-help-title="Resetting the pane layout" data-help="CyberChef's panes can be resized to suit your area of focus. This button will reset the pane sizes to their default configuration.">
+                                    <i class="material-icons" aria-hidden="true">view_compact</i>
                                 </button>
                             </span>
                         </div>
@@ -280,17 +280,17 @@
                                 <button type="button" class="btn btn-primary bmd-btn-icon" id="save-all-to-file" data-toggle="tooltip" title="Save all outputs to a zip file" style="display: none" data-help-title="Saving all outputs to a zip file" data-help="<p>When operating with multiple tabbed Inputs and Outputs, you can use this button to save off all the Outputs at once in a ZIP file.</p><p>Use the 'Bake' button to bake all Inputs at once.</p><p>You will be given the choice to specify the file extension for the Outputs, or you can let CyberChef attempt to detect the filetype of each one. If an Output's type is not clear, CyberChef will use the '.dat' extension.</p>">
                                         <i class="material-icons">archive</i>
                                     </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="save-to-file" data-toggle="tooltip" title="Save output to file" data-help-title="Saving output to a file" data-help="The currently active Output can be saved to a file. You will be asked to specify a filename. CyberChef will attempt to guess the correct file extension based on the data. If a file type cannot be detected, the extension defaults to '.dat' but can be changed manually.">
-                                    <i class="material-icons">save</i>
+                                <button type="button" aria-label="save" class="btn btn-primary bmd-btn-icon" id="save-to-file" data-toggle="tooltip" title="Save output to file" data-help-title="Saving output to a file" data-help="The currently active Output can be saved to a file. You will be asked to specify a filename. CyberChef will attempt to guess the correct file extension based on the data. If a file type cannot be detected, the extension defaults to '.dat' but can be changed manually.">
+                                    <i class="material-icons" aria-hidden="true">save</i>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="copy-output" data-toggle="tooltip" title="Copy raw output to the clipboard" data-help-title="Copying raw output to the clipboard" data-help="<p>Data can be copied from the Output in the normal way by selecting text and copying it. This button provides a quick way of copying the entire output to the clipboard without having to select it. It directly copies the raw data rather than selecting text in the Output editor. Each method should have the same result, but the button may be more efficient for large Outputs as it does not require any DOM interaction.</p>">
-                                    <i class="material-icons">content_copy</i>
+                                <button type="button" aria-label="copy content" class="btn btn-primary bmd-btn-icon" id="copy-output" data-toggle="tooltip" title="Copy raw output to the clipboard" data-help-title="Copying raw output to the clipboard" data-help="<p>Data can be copied from the Output in the normal way by selecting text and copying it. This button provides a quick way of copying the entire output to the clipboard without having to select it. It directly copies the raw data rather than selecting text in the Output editor. Each method should have the same result, but the button may be more efficient for large Outputs as it does not require any DOM interaction.</p>">
+                                    <i class="material-icons" aria-hidden="true">content_copy</i>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="switch" data-toggle="tooltip" title="Replace input with output" data-help-title="Replacing input with output" data-help="<p>This button moves the currently active Output data into the currently active Input tab, overwriting whatever data was already there.</p><p>The Input character encoding and EOL sequence will be changed to match the current Output values, so that the data is interpreted correctly.</p>">
-                                    <i class="material-icons">open_in_browser</i>
+                                <button type="button" aria-label="replace input with output" class="btn btn-primary bmd-btn-icon" id="switch" data-toggle="tooltip" title="Replace input with output" data-help-title="Replacing input with output" data-help="<p>This button moves the currently active Output data into the currently active Input tab, overwriting whatever data was already there.</p><p>The Input character encoding and EOL sequence will be changed to match the current Output values, so that the data is interpreted correctly.</p>">
+                                    <i class="material-icons" aria-hidden="true">open_in_browser</i>
                                 </button>
-                                <button type="button" class="btn btn-primary bmd-btn-icon" id="maximise-output" data-toggle="tooltip" title="Maximise output pane" data-help-title="Maximising the Output pane" data-help="This button allows you to view the Output pane at maximum size, hiding the Operations, Recipe and Input panes. You can restore the pane to its normal size by clicking the same button again.">
-                                    <i class="material-icons">fullscreen</i>
+                                <button type="button" aria-label="maximise output pane" class="btn btn-primary bmd-btn-icon" id="maximise-output" data-toggle="tooltip" title="Maximise output pane" data-help-title="Maximising the Output pane" data-help="This button allows you to view the Output pane at maximum size, hiding the Operations, Recipe and Input panes. You can restore the pane to its normal size by clicking the same button again.">
+                                    <i class="material-icons" aria-hidden="true">fullscreen</i>
                                 </button>
                             </span>
 
diff --git a/src/web/waiters/OutputWaiter.mjs b/src/web/waiters/OutputWaiter.mjs
index dae27f3e..75142971 100755
--- a/src/web/waiters/OutputWaiter.mjs
+++ b/src/web/waiters/OutputWaiter.mjs
@@ -1415,10 +1415,12 @@ class OutputWaiter {
             this.app.ioSplitter.collapse(0);
 
             $(el).attr("data-original-title", "Restore output pane");
+            $(el).attr("aria-label", "Restore output pane");
             el.querySelector("i").innerHTML = "fullscreen_exit";
         } else {
             document.body.classList.remove("output-maximised");
             $(el).attr("data-original-title", "Maximise output pane");
+            $(el).attr("aria-label", "Maximise output pane");
             el.querySelector("i").innerHTML = "fullscreen";
             this.app.initialiseSplitter(false);
             this.app.resetLayout();