diff --git a/main.ts b/main.ts
index 60ab512..26c0c38 100644
--- a/main.ts
+++ b/main.ts
@@ -13,6 +13,7 @@ import { renameFilesInObsidian } from './src/services/file.service';
 import { createPreviewElement } from './src/components/PreviewElement';
 import {
   getObsidianFilesByFolderName,
+  getObsidianFilesByRegExp,
   getObsidianFilesWithTagName,
 } from './src/services/obsidian.service';
 import { renderPreviewFiles } from './src/components/RenderPreviewFiles';
@@ -23,7 +24,8 @@ interface BulkRenamePluginSettings {
   existingSymbol: string;
   replacePattern: string;
   tags: string[];
-  viewType: 'tags' | 'folder';
+  userRegExp: string;
+  viewType: 'tags' | 'folder' | 'regexp';
 }
 
 const DEFAULT_SETTINGS: BulkRenamePluginSettings = {
@@ -31,6 +33,7 @@ const DEFAULT_SETTINGS: BulkRenamePluginSettings = {
   fileNames: [],
   existingSymbol: '',
   replacePattern: '',
+  userRegExp: '',
   tags: [],
   viewType: 'folder',
 };
@@ -38,10 +41,15 @@ const DEFAULT_SETTINGS: BulkRenamePluginSettings = {
 const isViewTypeFolder = ({ settings }: BulkRenamePlugin) => {
   return settings.viewType === 'folder';
 };
+
 const isViewTypeTags = ({ settings }: BulkRenamePlugin) => {
   return settings.viewType === 'tags';
 };
 
+const isViewTypeRegExp = ({ settings }: BulkRenamePlugin) => {
+  return settings.viewType === 'regexp';
+};
+
 class BulkRenamePlugin extends Plugin {
   settings: BulkRenamePluginSettings;
 
@@ -97,6 +105,7 @@ export class BulkRenameSettingsTab extends PluginSettingTab {
     this.renderTabs();
     this.renderFileLocation();
     this.renderTagNames();
+    this.renderRegExpInput();
     this.renderReplaceSymbol();
     this.renderFilesAndPreview();
     this.renderRenameFiles();
@@ -127,6 +136,17 @@ export class BulkRenameSettingsTab extends PluginSettingTab {
           await this.plugin.saveSettings();
           this.display();
         });
+      })
+      .addButton((button) => {
+        button.setButtonText('Search by RegExp');
+        if (isViewTypeRegExp(this.plugin)) {
+          button.setCta();
+        }
+        button.onClick(async () => {
+          this.plugin.settings.viewType = 'regexp';
+          await this.plugin.saveSettings();
+          this.display();
+        });
       });
   }
 
@@ -185,6 +205,38 @@ export class BulkRenameSettingsTab extends PluginSettingTab {
       });
   }
 
+  renderRegExpInput() {
+    if (!isViewTypeRegExp(this.plugin)) {
+      return;
+    }
+    new Setting(this.containerEl)
+      .setName('RegExp')
+      .setDesc('all files by titles will be found')
+      .addSearch((cb) => {
+        // @ts-ignore
+        cb.inputEl.addEventListener('keydown', (event) => {
+          if (event.key !== 'Enter') {
+            return;
+          }
+          const target = event.target as HTMLInputElement;
+
+          this.plugin.settings.userRegExp = target.value;
+          this.plugin.saveSettings();
+        });
+        cb.setPlaceholder('Example: #tag, #tag2')
+          .setValue(this.plugin.settings.userRegExp)
+          .onChange((newFolder) => {
+            this.plugin.settings.userRegExp = newFolder;
+            this.plugin.saveSettings();
+            this.getFilesByRegExp();
+          });
+        // @ts-ignore
+        cb.containerEl.addClass('bulk_regexp');
+        cb.inputEl.addClass('bulk_input');
+        cb.inputEl.onblur = this.reRenderPreview;
+      });
+  }
+
   renderReplaceSymbol() {
     const { settings } = this.plugin;
 
@@ -296,6 +348,12 @@ export class BulkRenameSettingsTab extends PluginSettingTab {
       this.getFilesByTags();
       return;
     }
+
+    if (isViewTypeRegExp(this.plugin)) {
+      this.getFilesByRegExp();
+      return;
+    }
+
     this.getFilesByFolder();
   }
 
@@ -312,6 +370,13 @@ export class BulkRenameSettingsTab extends PluginSettingTab {
       this.plugin,
     );
   }
+
+  getFilesByRegExp() {
+    this.plugin.settings.fileNames = getObsidianFilesByRegExp(
+      this.app,
+      this.plugin,
+    );
+  }
 }
 
 export default BulkRenamePlugin;
diff --git a/src/services/obsidian.service.ts b/src/services/obsidian.service.ts
index c383da2..d715fa3 100644
--- a/src/services/obsidian.service.ts
+++ b/src/services/obsidian.service.ts
@@ -17,6 +17,22 @@ export const getObsidianFilesByFolderName = (
   return filesSortedByName;
 };
 
+export const getObsidianFilesByRegExp = (
+  app: App,
+  plugin: BulkRenamePlugin,
+) => {
+  const { userRegExp } = plugin.settings;
+  const abstractFiles = app.vault.getAllLoadedFiles();
+
+  const files = abstractFiles.filter(
+    (file) => file instanceof TFile && file.parent.name.includes(userRegExp),
+  ) as TFile[];
+
+  const filesSortedByName = sortFilesByName(files);
+
+  return filesSortedByName;
+};
+
 export const getObsidianFilesWithTagName = (
   app: App,
   plugin: BulkRenamePlugin,
diff --git a/styles.css b/styles.css
index e62dd93..0fa17f3 100644
--- a/styles.css
+++ b/styles.css
@@ -23,3 +23,36 @@
 .bulk_preview_label {
   margin-right: 15px;
 }
+
+.bulk_regexp {
+  width: 100%;
+}
+
+.bulk_regexp > input {
+  color: green;
+  padding: 0 28px 0 14px;
+  font-size: 20px;
+  font-weight: 700;
+}
+
+.bulk_regexp:before {
+  content: '/';
+  top: 2px;
+  left: -15px;
+}
+
+.bulk_regexp:after {
+  content: '/';
+  bottom: 5px;
+  right: -15px;
+}
+
+.bulk_regexp:before,
+.bulk_regexp:after {
+  color: #000080;
+  font-size: 30px;
+  /*background-color: #cccccc;*/
+  display: block;
+  /*text-align: center;*/
+  position: absolute;
+}