diff --git a/browser/main/lib/ConfigManager.js b/browser/main/lib/ConfigManager.js
new file mode 100644
index 00000000..71153544
--- /dev/null
+++ b/browser/main/lib/ConfigManager.js
@@ -0,0 +1,45 @@
+import _ from 'lodash'
+
+const defaultConfig = {
+  zoom: 1,
+  isSideNavFolded: false
+}
+
+function _validate (config) {
+  if (!_.isObject(config)) return false
+  if (!_.isNumber(config.zoom) || config.zoom < 0) return false
+  if (!_.isBoolean(config.isSideNavFolded)) return false
+
+  return true
+}
+
+function _save (config) {
+  window.localStorage.setItem('config', JSON.stringify(config))
+}
+
+function get () {
+  let config = window.localStorage.getItem('config')
+
+  try {
+    config = JSON.parse(config)
+    if (!_validate(config)) throw new Error('INVALID CONFIG')
+  } catch (err) {
+    console.warn('Boostnote resets the malformed configuration.')
+    config = defaultConfig
+    _save(config)
+  }
+
+  return config
+}
+
+function set (updates) {
+  let currentConfig = get()
+  let newConfig = Object.assign({}, defaultConfig, currentConfig, updates)
+  if (!_validate(newConfig)) throw new Error('INVALID CONFIG')
+  _save(newConfig)
+}
+
+export default {
+  get,
+  set
+}
diff --git a/browser/main/lib/ZoomManager.js b/browser/main/lib/ZoomManager.js
new file mode 100644
index 00000000..463df222
--- /dev/null
+++ b/browser/main/lib/ZoomManager.js
@@ -0,0 +1,30 @@
+import ConfigManager from './ConfigManager'
+
+const electron = require('electron')
+const { remote } = electron
+
+_init()
+
+function _init () {
+  setZoom(getZoom(), true)
+}
+
+function _saveZoom (zoomFactor) {
+  ConfigManager.set({zoom: zoomFactor})
+}
+
+function setZoom (zoomFactor, noSave = false) {
+  if (!noSave) _saveZoom(zoomFactor)
+  remote.getCurrentWebContents().setZoomFactor(zoomFactor)
+}
+
+function getZoom () {
+  let config = ConfigManager.get()
+
+  return config.zoom
+}
+
+export default {
+  setZoom,
+  getZoom
+}