diff --git a/browser/components/TagListItem.js b/browser/components/TagListItem.js
index 6cd50c9c..19f11791 100644
--- a/browser/components/TagListItem.js
+++ b/browser/components/TagListItem.js
@@ -14,8 +14,8 @@ import CSSModules from 'browser/lib/CSSModules'
 * @param {bool} isRelated
 */
 
-const TagListItem = ({name, handleClickTagListItem, handleClickNarrowToTag, isActive, isRelated, count}) => (
-  <div styleName='tagList-itemContainer'>
+const TagListItem = ({name, handleClickTagListItem, handleClickNarrowToTag, handleContextMenu, isActive, isRelated, count}) => (
+  <div styleName='tagList-itemContainer' onContextMenu={e => handleContextMenu(e, name)}>
     {isRelated
       ? <button styleName={isActive ? 'tagList-itemNarrow-active' : 'tagList-itemNarrow'} onClick={() => handleClickNarrowToTag(name)}>
         <i className={isActive ? 'fa fa-minus-circle' : 'fa fa-plus-circle'} />
diff --git a/browser/main/Detail/MarkdownNoteDetail.js b/browser/main/Detail/MarkdownNoteDetail.js
index 5ba4265b..f7f18d4c 100755
--- a/browser/main/Detail/MarkdownNoteDetail.js
+++ b/browser/main/Detail/MarkdownNoteDetail.js
@@ -65,7 +65,9 @@ class MarkdownNoteDetail extends React.Component {
   }
 
   componentWillReceiveProps (nextProps) {
-    if (nextProps.note.key !== this.props.note.key && !this.state.isMovingNote) {
+    const isNewNote = nextProps.note.key !== this.props.note.key
+    const hasDeletedTags = nextProps.note.tags.length < this.props.note.tags.length
+    if (!this.state.isMovingNote && (isNewNote || hasDeletedTags)) {
       if (this.saveQueue != null) this.saveNow()
       this.setState({
         note: Object.assign({}, nextProps.note)
diff --git a/browser/main/Main.js b/browser/main/Main.js
index 5fe9d493..1ffb2f74 100644
--- a/browser/main/Main.js
+++ b/browser/main/Main.js
@@ -297,7 +297,7 @@ class Main extends React.Component {
         onMouseUp={e => this.handleMouseUp(e)}
       >
         <SideNav
-          {..._.pick(this.props, ['dispatch', 'data', 'config', 'location'])}
+          {..._.pick(this.props, ['dispatch', 'data', 'config', 'params', 'location'])}
           width={this.state.navWidth}
         />
         {!config.isSideNavFolded &&
diff --git a/browser/main/SideNav/index.js b/browser/main/SideNav/index.js
index 977a8fb5..e78c9c77 100644
--- a/browser/main/SideNav/index.js
+++ b/browser/main/SideNav/index.js
@@ -18,6 +18,7 @@ import TagButton from './TagButton'
 import {SortableContainer} from 'react-sortable-hoc'
 import i18n from 'browser/lib/i18n'
 import context from 'browser/lib/context'
+import { remote } from 'electron'
 
 class SideNav extends React.Component {
   // TODO: should not use electron stuff v0.7
@@ -30,6 +31,52 @@ class SideNav extends React.Component {
     EventEmitter.off('side:preferences', this.handleMenuButtonClick)
   }
 
+  deleteTag (tag) {
+    const selectedButton = remote.dialog.showMessageBox(remote.getCurrentWindow(), {
+      ype: 'warning',
+      message: i18n.__('Confirm tag deletion'),
+      detail: i18n.__('This will permanently remove this tag.'),
+      buttons: [i18n.__('Confirm'), i18n.__('Cancel')]
+    })
+
+    if (selectedButton === 0) {
+      const { data, dispatch, location, params } = this.props
+
+      const notes = data.noteMap
+        .map(note => note)
+        .filter(note => note.tags.indexOf(tag) !== -1)
+        .map(note => {
+          note = Object.assign({}, note)
+          note.tags = note.tags.slice()
+
+          note.tags.splice(note.tags.indexOf(tag), 1)
+
+          return note
+        })
+
+      Promise
+        .all(notes.map(note => dataApi.updateNote(note.storage, note.key, note)))
+        .then(updatedNotes => {
+          updatedNotes.forEach(note => {
+            dispatch({
+              type: 'UPDATE_NOTE',
+              note
+            })
+          })
+
+          if (location.pathname.match('/tags')) {
+            const tags = params.tagname.split(' ')
+            const index = tags.indexOf(tag)
+            if (index !== -1) {
+              tags.splice(index, 1)
+
+              this.context.router.push(`/tags/${tags.map(tag => encodeURIComponent(tag)).join(' ')}`)
+            }
+          }
+        })
+    }
+  }
+
   handleMenuButtonClick (e) {
     openModal(PreferencesModal)
   }
@@ -44,6 +91,17 @@ class SideNav extends React.Component {
     router.push('/starred')
   }
 
+  handleTagContextMenu (e, tag) {
+    const menu = []
+
+    menu.push({
+      label: i18n.__('Delete Tag'),
+      click: this.deleteTag.bind(this, tag)
+    })
+
+    context.popup(menu)
+  }
+
   handleToggleButtonClick (e) {
     const { dispatch, config } = this.props
 
@@ -165,6 +223,7 @@ class SideNav extends React.Component {
             name={tag.name}
             handleClickTagListItem={this.handleClickTagListItem.bind(this)}
             handleClickNarrowToTag={this.handleClickNarrowToTag.bind(this)}
+            handleContextMenu={this.handleTagContextMenu.bind(this)}
             isActive={this.getTagActive(location.pathname, tag.name)}
             isRelated={tag.related}
             key={tag.name}
diff --git a/tests/components/__snapshots__/TagListItem.snapshot.test.js.snap b/tests/components/__snapshots__/TagListItem.snapshot.test.js.snap
index 80293ab4..ad883222 100644
--- a/tests/components/__snapshots__/TagListItem.snapshot.test.js.snap
+++ b/tests/components/__snapshots__/TagListItem.snapshot.test.js.snap
@@ -3,6 +3,7 @@
 exports[`TagListItem renders correctly 1`] = `
 <div
   className="tagList-itemContainer"
+  onContextMenu={[Function]}
 >
   <div
     className="tagList-itemNarrow"