diff --git a/.eslintrc.google.js b/.eslintrc.google.js
new file mode 100644
index 0000000..1b9c384
--- /dev/null
+++ b/.eslintrc.google.js
@@ -0,0 +1,334 @@
+/**
+ * Copyright 2016 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+module.exports = {
+  rules: {
+    // The rules below are listed in the order they appear on the eslint
+    // rules page. All rules are listed to make it easier to keep in sync
+    // as new ESLint rules are added.
+    // http://eslint.org/docs/rules/
+    // - Rules in the `eslint:recommended` ruleset that aren't specifically
+    //   mentioned by the google styleguide are listed but commented out (so
+    //   they don't override a base ruleset).
+    // - Rules that are recommended but contradict the Google styleguide
+    //   are explicitely set to the Google styleguide value.
+
+    // Possible Errors
+    // http://eslint.org/docs/rules/#possible-errors
+    // ---------------------------------------------
+    // 'for-direction': 0,
+    // 'no-await-in-loop': 0,
+    // 'no-compare-neg-zero': 2, // eslint:recommended
+    'no-cond-assign': 0, // eslint:recommended
+    // 'no-console': 2, // eslint:recommended
+    // 'no-constant-condition': 2, // eslint:recommended
+    // 'no-control-regex': 2, // eslint:recommended
+    // 'no-debugger': 2, // eslint:recommended
+    // 'no-dupe-args': 2, // eslint:recommended
+    // 'no-dupe-keys': 2, // eslint:recommended
+    // 'no-duplicate-case': 2, // eslint:recommended
+    // 'no-empty': 2, // eslint:recommended
+    // 'no-empty-character-class': 2, // eslint:recommended
+    // 'no-ex-assign': 2, // eslint:recommended
+    // 'no-extra-boolean-cast': 2, // eslint:recommended
+    // 'no-extra-parens': 0,
+    // 'no-extra-semi': 2, // eslint:recommended
+    // 'no-func-assign': 2, // eslint:recommended
+    // 'no-inner-declarations': 2, // eslint:recommended
+    // 'no-invalid-regexp': 2, // eslint:recommended
+    'no-irregular-whitespace': 2, // eslint:recommended
+    // 'no-obj-calls': 2, // eslint:recommended
+    // 'no-prototype-builtins': 0,
+    // 'no-regex-spaces': 2, // eslint:recommended
+    // 'no-sparse-arrays': 2, // eslint:recommended
+    // 'no-template-curly-in-string': 0,
+    'no-unexpected-multiline': 2, // eslint:recommended
+    // 'no-unreachable': 2, // eslint:recommended
+    // 'no-unsafe-finally': 2, // eslint:recommended
+    // 'no-unsafe-negation': 0,
+    // 'use-isnan': 2 // eslint:recommended
+    'valid-jsdoc': [2, {
+      requireParamDescription: false,
+      requireReturnDescription: false,
+      requireReturn: false,
+      prefer: {returns: 'return'},
+    }],
+    // 'valid-typeof': 2 // eslint:recommended
+
+
+    // Best Practices
+    // http://eslint.org/docs/rules/#best-practices
+    // --------------------------------------------
+
+    // 'accessor-pairs': 0,
+    // 'array-callback-return': 0,
+    // 'block-scoped-var': 0,
+    // 'class-methods-use-this': 0,
+    // 'complexity': 0,
+    // 'consistent-return': 0
+    'curly': [2, 'multi-line'], // TODO(philipwalton): add an option to enforce
+                                // braces with the exception of simple,
+                                // single-line if statements.
+    // 'default-case': 0,
+    // 'dot-location': 0,
+    // 'dot-notation': 0,
+    // 'eqeqeq': 0,
+    'guard-for-in': 2,
+    // 'no-alert': 0,
+    'no-caller': 2,
+    // 'no-case-declarations': 2, // eslint:recommended
+    // 'no-div-regex': 0,
+    // 'no-else-return': 0,
+    // 'no-empty-function': 0,
+    // 'no-empty-pattern': 2, // eslint:recommended
+    // 'no-eq-null': 0,
+    // 'no-eval': 0,
+    'no-extend-native': 2,
+    'no-extra-bind': 2,
+    // 'no-extra-label': 0,
+    // 'no-fallthrough': 2, // eslint:recommended
+    // 'no-floating-decimal': 0,
+    // 'no-global-assign': 0,
+    // 'no-implicit-coercion': 0,
+    // 'no-implicit-globals': 0,
+    // 'no-implied-eval': 0,
+    'no-invalid-this': 2,
+    // 'no-iterator': 0,
+    // 'no-labels': 0,
+    // 'no-lone-blocks': 0,
+    // 'no-loop-func': 0,
+    // 'no-magic-numbers': 0,
+    'no-multi-spaces': 2,
+    'no-multi-str': 2,
+    // 'no-new': 0,
+    // 'no-new-func': 0,
+    'no-new-wrappers': 2,
+    // 'no-octal': 2, // eslint:recommended
+    // 'no-octal-escape': 0,
+    // 'no-param-reassign': 0,
+    // 'no-proto': 0,
+    // 'no-redeclare': 2, // eslint:recommended
+    // 'no-restricted-properties': 0,
+    // 'no-return-assign': 0,
+    // 'no-script-url': 0,
+    // 'no-self-assign': 2, // eslint:recommended
+    // 'no-self-compare': 0,
+    // 'no-sequences': 0,
+    'no-throw-literal': 2, // eslint:recommended
+    // 'no-unmodified-loop-condition': 0,
+    // 'no-unused-expressions': 0,
+    // 'no-unused-labels': 2, // eslint:recommended
+    // 'no-useless-call': 0,
+    // 'no-useless-concat': 0,
+    // 'no-useless-escape': 0,
+    // 'no-void': 0,
+    // 'no-warning-comments': 0,
+    'no-with': 2,
+    // 'prefer-promise-reject-errors': 0,
+    // 'radix': 0,
+    // 'require-await': 0,
+    // 'vars-on-top': 0,
+    // 'wrap-iife': 0,
+    // 'yoda': 0,
+
+    // Strict Mode
+    // http://eslint.org/docs/rules/#strict-mode
+    // -----------------------------------------
+    // 'strict': 0,
+
+    // Variables
+    // http://eslint.org/docs/rules/#variables
+    // ---------------------------------------
+    // 'init-declarations': 0,
+    // 'no-catch-shadow': 0,
+    // 'no-delete-var': 2, // eslint:recommended
+    // 'no-label-var': 0,
+    // 'no-restricted-globals': 0,
+    // 'no-shadow': 0,
+    // 'no-shadow-restricted-names': 0,
+    // 'no-undef': 2, // eslint:recommended
+    // 'no-undef-init': 0,
+    // 'no-undefined': 0,
+    'no-unused-vars': [2, {args: 'none'}], // eslint:recommended
+    // 'no-use-before-define': 0,
+
+    // Node.js and CommonJS
+    // http://eslint.org/docs/rules/#nodejs-and-commonjs
+    // -------------------------------------------------
+    // 'callback-return': 0,
+    // 'global-require': 0,
+    // 'handle-callback-err': 0,
+    // 'no-buffer-constructor': 0,
+    // 'no-mixed-requires': 0,
+    // 'no-new-require': 0,
+    // 'no-path-concat': 0,
+    // 'no-process-env': 0,
+    // 'no-process-exit': 0,
+    // 'no-restricted-modules': 0,
+    // 'no-sync': 0,
+
+    // Stylistic Issues
+    // http://eslint.org/docs/rules/#stylistic-issues
+    // ----------------------------------------------
+    'array-bracket-newline': 0, // eslint:recommended
+    'array-bracket-spacing': [2, 'never'],
+    'array-element-newline': 0, // eslint:recommended
+    'block-spacing': [2, 'never'],
+    'brace-style': 2,
+    'camelcase': [2, {properties: 'never'}],
+    // 'capitalized-comments': 0,
+    'comma-dangle': [2, 'always-multiline'],
+    'comma-spacing': 2,
+    'comma-style': 2,
+    'computed-property-spacing': 2,
+    // 'consistent-this': 0,
+    'eol-last': 2,
+    'func-call-spacing': 2,
+    // 'func-name-matching': 0,
+    // 'func-names': 0,
+    // 'func-style': 0,
+    // 'id-blacklist': 0,
+    // 'id-length': 0,
+    // 'id-match': 0,
+    // 'indent': 0, // TODO(philipwalton): this rule isn't compatible with
+                    // Google's 4-space indent for line continuations.
+    // 'jsx-quotes': 0,
+    'key-spacing': 2,
+    'keyword-spacing': 2,
+    // 'line-comment-position': 0,
+    'linebreak-style': 2,
+    // 'lines-around-comment': 0,
+    // 'max-depth': 0,
+    'max-len': [2, {
+      code: 80,
+      tabWidth: 2,
+      ignoreUrls: true,
+      ignorePattern: '^goog\.(module|require)',
+    }],
+    // 'max-lines': 0,
+    // 'max-nested-callbacks': 0,
+    // 'max-params': 0,
+    // 'max-statements': 0,
+    // 'max-statements-per-line': 0,
+    // 'multiline-ternary': 0, // TODO(philipwalton): add a rule to enforce the
+                               // operator appearing at the end of the line.
+    'new-cap': 2,
+    // 'new-parens': 0,
+    // 'newline-per-chained-call': 0,
+    'no-array-constructor': 2,
+    // 'no-bitwise': 0,
+    // 'no-continue': 0,
+    // 'no-inline-comments': 0,
+    // 'no-lonely-if': 0,
+    // 'no-mixed-operators': 0,
+    'no-mixed-spaces-and-tabs': 2, // eslint:recommended
+    // 'no-multi-assign': 0,
+    'no-multiple-empty-lines': [2, {max: 2}],
+    // 'no-negated-condition': 0,
+    // 'no-nested-ternary': 0,
+    'no-new-object': 2,
+    // 'no-plusplus': 0,
+    // 'no-restricted-syntax': 0,
+    'no-tabs': 2,
+    // 'no-ternary': 0,
+    'no-trailing-spaces': 2,
+    // 'no-underscore-dangle': 0,
+    // 'no-unneeded-ternary': 0,
+    // 'no-whitespace-before-property': 0,
+    // 'nonblock-statement-body-position': 0,
+    // 'object-curly-newline': 0,
+    'object-curly-spacing': 2,
+    // 'object-property-newline': 0,
+    'one-var': [2, {
+      var: 'never',
+      let: 'never',
+      const: 'never',
+    }],
+    // 'one-var-declaration-per-line': 0,
+    // 'operator-assignment': 0,
+    // 'operator-linebreak': 0,
+    'padded-blocks': [2, 'never'],
+    // 'padding-line-between-statements': 0,
+    'quote-props': [2, 'consistent'],
+    'quotes': [2, 'single', {allowTemplateLiterals: true}],
+    'require-jsdoc': [2, {
+      require: {
+        FunctionDeclaration: true,
+        MethodDefinition: true,
+        ClassDeclaration: true,
+      },
+    }],
+    'semi': 2,
+    'semi-spacing': 2,
+    // 'semi-style': 0,
+    // 'sort-keys': 0,
+    // 'sort-vars': 0,
+    'space-before-blocks': 2,
+    'space-before-function-paren': [2, {
+      asyncArrow: 'always',
+      anonymous: 'never',
+      named: 'never',
+    }],
+    // 'space-in-parens': 0,
+    // 'space-infix-ops': 0,
+    // 'space-unary-ops': 0,
+    'spaced-comment': [2, 'always'],
+    // 'switch-colon-spacing': 2,
+    // 'template-tag-spacing': 0,
+    // 'unicode-bom': 0,
+    // 'wrap-regex': 0,
+
+    // ECMAScript 6
+    // http://eslint.org/docs/rules/#ecmascript-6
+    // ------------------------------------------
+    // 'arrow-body-style': 0,
+    'arrow-parens': [2, 'always'], // TODO(philipwalton): technically arrow
+                                   // parens are optional but recommended.
+                                   // ESLint doesn't support a *consistent*
+                                   // setting so "always" is used.
+    // 'arrow-spacing': 0,
+    'constructor-super': 2, // eslint:recommended
+    'generator-star-spacing': [2, 'after'],
+    // 'no-class-assign': 0,
+    // 'no-confusing-arrow': 0,
+    // 'no-const-assign': 0, // eslint:recommended
+    // 'no-dupe-class-members': 0, // eslint:recommended
+    // 'no-duplicate-imports': 0,
+    'no-new-symbol': 2, // eslint:recommended
+    // 'no-restricted-imports': 0,
+    'no-this-before-super': 2, // eslint:recommended
+    // 'no-useless-computed-key': 0,
+    // 'no-useless-constructor': 0,
+    // 'no-useless-rename': 0,
+    'no-var': 2,
+    // 'object-shorthand': 0,
+    // 'prefer-arrow-callback': 0,
+    // 'prefer-const': 0,
+    // 'prefer-destructuring': 0,
+    // 'prefer-numeric-literals': 0,
+    'prefer-rest-params': 2,
+    'prefer-spread': 2,
+    // 'prefer-template': 0,
+    // 'require-yield': 2, // eslint:recommended
+    'rest-spread-spacing': 2,
+    // 'sort-imports': 0,
+    // 'symbol-description': 0,
+    // 'template-curly-spacing': 0,
+    'yield-star-spacing': [2, 'after'],
+  },
+};
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..33b6d56
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,63 @@
+module.exports = {
+    extends: './.eslintrc.google.js',
+    parserOptions: {
+        "ecmaVersion": 2017,
+        "sourceType": "module",
+    },
+    env: {
+        es6: true,
+    },
+    rules: {
+        'arrow-parens': 0,
+        'block-spacing': 0,
+        'brace-style': 0,
+        'camelcase': 0,
+        'comma-dangle': 0,
+        'comma-style': [2, 'last'],
+        'curly': 0,
+        'indent': [0, 4],
+        'key-spacing': 0,
+        'linebreak-style': 0,
+        'linebreak-style': 2,
+        'max-len': 0,
+        'new-cap': 0,
+        'no-invalid-this': 0,
+        'no-multi-spaces': 0,
+        'no-undef': 2,
+        'no-unused-vars': 1,
+        'object-curly-spacing': 0,
+        'padded-blocks': [0, 'never'],
+        'quote-props': 0,
+        'quotes': 0,
+        'require-jsdoc': 0,
+        'semi': [1, 'always'],
+        'space-before-function-paren': [0, {"anonymous": "never"}],
+        'valid-jsdoc': 0,
+    },
+    globals: {
+        // $: true,
+        _: true,
+        rdfstore: true,
+        FormData: true,
+        Backbone: true,
+        document: true,
+        require: true,
+        define: true,
+        console: true,
+        window: true,
+        process: true,
+        module: true,
+        Image: true,
+        exports: true,
+        parent: true,
+        setTimeout: true,
+        setInterval: true,
+        clearTimeout: true,
+        clearInterval: true,
+        __dirname: true,
+        GM_registerMenuCommand: true,
+        __filename: true,
+        Buffer: true,
+        fetch: true,
+    },
+}
diff --git a/web/ocr-fileformat.js b/web/ocr-fileformat.js
index 22fc143..26353f8 100644
--- a/web/ocr-fileformat.js
+++ b/web/ocr-fileformat.js
@@ -1,18 +1,20 @@
-var OcrFileformatAPI = function OcrFileformatAPI(endpoint) {
+/* globals $ */
+
+let OcrFileformatAPI = function OcrFileformatAPI(endpoint) {
     this.endpoint = endpoint;
 };
 
 OcrFileformatAPI.prototype.urlFor = function urlFor(action, params) {
     params || (params = {});
-    url = this.endpoint + '?do=' + action;
-    for (var paramName of Object.keys(params)) {
+    let url = this.endpoint + '?do=' + action;
+    for (let paramName of Object.keys(params)) {
         url += '&' + paramName + '=' + params[paramName];
     }
     return url;
 };
 
 OcrFileformatAPI.prototype.updateFormats = function updateFormats(cb) {
-    var self = this;
+    let self = this;
     this.request('list', null, null, function(err, formats) {
         self.formats = formats;
         cb(err);
@@ -20,9 +22,9 @@ OcrFileformatAPI.prototype.updateFormats = function updateFormats(cb) {
 };
 
 OcrFileformatAPI.prototype.request = function request(endpoint, query, formData, cb) {
-    ajaxCall = {
+    let ajaxCall = {
         type: 'GET',
-        url: api.urlFor(endpoint, query),
+        url: window.api.urlFor(endpoint, query),
         success: function(data) {
             cb(null, data);
         },
@@ -32,7 +34,7 @@ OcrFileformatAPI.prototype.request = function request(endpoint, query, formData,
     };
     if (formData) {
         ajaxCall.type = 'POST';
-        ajaxCall.data = formData
+        ajaxCall.data = formData;
         ajaxCall.processData =  false;
         ajaxCall.contentType = false;
     }
@@ -56,8 +58,7 @@ function onChangeFormat() {
         });
         $("#transform-from").removeAttr('disabled');
     }
-    var selectedFrom = $("#transform-from").val();
-    var selectedTo = $("#transform-to").val();
+    let selectedFrom = $("#transform-from").val();
     $("#transform-to").attr('disabled', selectedFrom === null);
     if (selectedFrom) {
         $("#transform-to option").slice(1).remove();
@@ -73,48 +74,50 @@ function onChangeFormat() {
 }
 
 function submit(tabName, params) {
-    var pane = $("#" + tabName);
-    var input = pane.find(".input .active input");
+    let pane = $("#" + tabName);
+    let input = pane.find(".input .active input");
+    let formData;
+    let url = input.val();
     if (input.attr('type') === 'file') {
-        var formData = new FormData();
+        formData = new FormData();
         formData.append('file', input.prop('files')[0]);
     } else {
-        var url = input.val();
         params.url = url;
     }
     $("button .spinning", pane).removeClass('hidden');
-    api.request(tabName, params, formData, function(err, data) {
+    window.api.request(tabName, params, formData, function(err, data) {
         pane.find("button .spinning").addClass('hidden');
-        if (err)
+        if (err) {
             return $.notify(err, 'error');
+        }
         if (url)  {
             pane.find(".result a.download").attr('href', url);
         }
         pane.find(".result pre code").html(escapeHTML(data));
         pane.find(".result").removeClass('hidden');
-        /*global Prism*/
-        Prism.highlightAll()
+        /* global Prism*/
+        Prism.highlightAll();
     });
 }
 
 function maybeEnableSubmit() {
-    var el = $(".tab-pane.active")
-    var inputSet = !!$(".input .active input", el).val();
-    var selects = $(".formats select", el);
-    var formatsSet = selects.length == selects.map(function() { return $(this).val(); }).length;
+    let el = $(".tab-pane.active");
+    let inputSet = !!$(".input .active input", el).val();
+    let selects = $(".formats select", el);
+    let formatsSet = selects.length == selects.map(function() { return $(this).val(); }).length;
     $("button", el).attr('disabled', !(inputSet && formatsSet));
 }
 
 function hashRoute() {
-    var hash = window.location.hash;
-    var pageTab = hash.replace(/-.*/,'');
+    let hash = window.location.hash;
+    let pageTab = hash.replace(/-.*/, '');
     $("a[data-toggle='tab'][href='" + pageTab + "']").tab('show');
     $("a[data-toggle='tab'][href='" + hash + "']").tab('show');
 }
 
 $(function() {
     $.notify.defaults({position: 'bottom right'});
-    var api = window.api = new OcrFileformatAPI('ocr-fileformat.php');
+    const api = window.api = new OcrFileformatAPI('ocr-fileformat.php');
     $.notify("Loading formats", 'info');
     api.updateFormats(function(err) {
         if (err) {