diff --git a/tools/Base64/index.html b/tools/Base64/index.html
index 11d158d..385459f 100644
--- a/tools/Base64/index.html
+++ b/tools/Base64/index.html
@@ -9,11 +9,11 @@
     <h1 style="color: #ffffff;">Encode/decode data to base64</h1>
     <form>
         <label style="color: #ffffff;">Input data</label><br>
-        <textarea style="background: #343538; color: #ffffff;" value="" rows="6" cols="80" id="input" required></textarea><br>
+        <textarea style=" width: 100%; background: #343538; color: #ffffff;" value="" rows="6" cols="80" id="input" required></textarea><br>
         <button class="button" style="--color:#1e9bff; background: bottom;"type="button" onclick="doencode();">Encode</button>
         <button type="button" style= "--color: #ff1867; margin-left: 2em; background: bottom;" class="button" onclick="dodecode();">Decode</button><br>
         <label style="color: #ffffff;">Output</label><br>
-        <textarea style="background: #343538; color: #ffffff;" id="output" rows="6" cols="80" readonly></textarea><br>
+        <textarea style=" width: 100%; background: #343538; color: #ffffff;" id="output" rows="6" cols="80" readonly></textarea><br>
         <button class="button" type="button" id="copy" style="--color:#1e9bff; background: bottom;" onclick="docopy();">Copy</button>
     </form>
 </div>