diff --git a/src/undiscord-core.js b/src/undiscord-core.js
index 955467f2..8e2aa3ef 100644
--- a/src/undiscord-core.js
+++ b/src/undiscord-core.js
@@ -22,6 +22,8 @@ class UndiscordCore {
     authorId: null, // Author of the messages you want to delete
     guildId: null, // Server were the messages are located
     channelId: null, // Channel were the messages are located
+    threadId: null, // Thread/forum where the messages are located
+    isThread: false, // Delete only messages in thread
     minId: null, // Only delete messages after this, leave blank do delete all
     maxId: null, // Only delete messages before this, leave blank do delete all
     content: null, // Filter messages that contains this text content
@@ -312,6 +314,11 @@ class UndiscordCore {
     messagesToDelete = messagesToDelete.filter(msg => msg.type === 0 || (msg.type >= 6 && msg.type <= 21));
     messagesToDelete = messagesToDelete.filter(msg => msg.pinned ? this.options.includePinned : true);
 
+    // only delete messages in the thread
+    if (this.options.isThread) {
+      messagesToDelete = messagesToDelete.filter(msg => msg.channel_id === this.options.threadId);
+    }
+
     // custom filter of messages
     try {
       const regex = new RegExp(this.options.pattern, 'i');
diff --git a/src/undiscord-ui.js b/src/undiscord-ui.js
index ec0a59b4..67644a0d 100644
--- a/src/undiscord-ui.js
+++ b/src/undiscord-ui.js
@@ -27,6 +27,10 @@ const WIKI = 'https://github.com/victornpb/undiscord/wiki';
 const undiscordCore = new UndiscordCore();
 messagePicker.init();
 
+const state = {
+  threadId: null,
+  isThread: false,
+};
 const ui = {
   undiscordWindow: null,
   undiscordBtn: null,
@@ -103,12 +107,15 @@ function initUI() {
   $('button#stop').onclick = stopAction;
   $('button#clear').onclick = () => ui.logArea.innerHTML = '';
   $('button#getAuthor').onclick = () => $('input#authorId').value = getAuthorId();
-  $('button#getGuild').onclick = () => {
+  $('button#getGuild').onclick = async () => {
     const guildId = $('input#guildId').value = getGuildId();
-    if (guildId === '@me') $('input#channelId').value = getChannelId();
+    if (guildId === '@me') { state.isThread = 0; $('input#channelId').value = await getChannelId()[0]; }
   };
-  $('button#getChannel').onclick = () => {
-    $('input#channelId').value = getChannelId();
+  $('button#getChannel').onclick = async () => {
+    const id = await getChannelId();
+    state.isThread = id[1];
+    state.threadId = id[2];
+    $('input#channelId').value = id[0];
     $('input#guildId').value = getGuildId();
   };
   $('#redact').onchange = () => {
@@ -252,6 +259,8 @@ async function startAction() {
   const authorId = $('input#authorId').value.trim();
   const guildId = $('input#guildId').value.trim();
   const channelIds = $('input#channelId').value.trim().split(/\s*,\s*/);
+  const isThread = state.isThread;
+  const threadId = state.threadId;
   const includeNsfw = $('input#includeNsfw').checked;
   // filter
   const content = $('input#search').value.trim();
@@ -286,6 +295,8 @@ async function startAction() {
     authorId,
     guildId,
     channelId: channelIds.length === 1 ? channelIds[0] : undefined, // single or multiple channel
+    isThread,
+    threadId,
     minId: minId || minDate,
     maxId: maxId || maxDate,
     content,
diff --git a/src/utils/getIds.js b/src/utils/getIds.js
index 600aaeda..470beb9d 100644
--- a/src/utils/getIds.js
+++ b/src/utils/getIds.js
@@ -23,9 +23,19 @@ export function getGuildId() {
   else alert('Could not find the Guild ID!\nPlease make sure you are on a Server or DM.');
 }
 
-export function getChannelId() {
+export async function getChannelId() {
   const m = location.href.match(/channels\/([\w@]+)\/(\d+)/);
-  if (m) return m[2];
+  if (m) {
+    try {
+      const response=await fetch(`https://discord.com/api/v9/channels/${m[2]}`,{headers:{Authorization:getToken()}});
+      const data = await response.json();
+      if ([10, 11, 12].includes(data.type)) {log.info('selecting parent channel'); return [data.parent_id,true,m[2]];}
+      else {return [m[2],false,null];}
+    } catch (err) {
+      log.info('Could not get channel type, assuming not thread.');
+      return [m[2],false,null];
+    }
+  }
   else alert('Could not find the Channel ID!\nPlease make sure you are on a Channel or DM.');
 }