diff --git a/LICENSE.md b/LICENSE.md
index 1bb5f69..2c5f514 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 Thiago Santos
+Copyright (c) 2017 Gustavo Quinalha
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/bin/seotopper.js b/bin/seotopper.js
new file mode 100644
index 0000000..13ca945
--- /dev/null
+++ b/bin/seotopper.js
@@ -0,0 +1,198 @@
+#!/usr/bin/env node
+
+const inquirer = require('inquirer')
+const seotopper = require('../lib/seotopper')
+
+const questions = [
+  {
+    type: 'input',
+    name: 'title',
+    message: 'What\'s the title of your page',
+    validate: value => {
+      if (value === '') {
+        return 'Please enter a title'
+      }
+      if (value.length > 57) {
+        return 'Please enter a title with less than 57 characters'
+      }
+      return true
+    }
+  },
+  {
+    type: 'input',
+    name: 'description',
+    message: 'What\'s the description of your page',
+    validate: value => {
+      if (value === '') {
+        return 'Please enter a description'
+      }
+      if (value.length > 160) {
+        return 'Please enter a description with less than 160 characters'
+      }
+      return true
+    }
+  },
+  {
+    type: 'input',
+    name: 'author',
+    message: 'Who\'s the author',
+    validate: value => {
+      if (value === '') {
+        return 'Please enter an author\'s name'
+      }
+      return true
+    }
+  },
+  {
+    type: 'input',
+    name: 'image',
+    message: 'What\'s the image of your page',
+    validate: value => {
+      if (value === '') {
+        return 'Please enter an image'
+      }
+      return true
+    }
+  },
+  {
+    type: 'input',
+    name: 'canonical',
+    message: 'What\'s the canonical url of your page',
+    validate: value => {
+      if (value === '') {
+        return 'Please enter a canonical url'
+      }
+      return true
+    }
+  },
+  {
+    type: 'list',
+    name: 'robots',
+    message: 'What you wanna tell to the robots',
+    choices: [
+      'index/follow',
+      'noindex/follow',
+      'index/nofollow',
+      'noarchive',
+      'nosnippet',
+      'noodp',
+      'notranslate',
+      'noimageindex',
+      'none'
+    ]
+  },
+  {
+    type: 'input',
+    name: 'base',
+    message: 'What\'s the base url of your page'
+  },
+  {
+    type: 'input',
+    name: 'sitemap',
+    message: 'What\'s the sitemap of your page'
+  },
+  {
+    type: 'input',
+    name: 'themeColor',
+    message: 'What\'s the theme-color of your page'
+  },
+  {
+    type: 'confirm',
+    name: 'facebook',
+    message: 'Do you wanna seo for facebook'
+  },
+  {
+    type: 'list',
+    name: 'facebookType',
+    message: 'What\'s the type of your page',
+    choices: [
+      'website',
+      'blog',
+      'article',
+      'activity',
+      'sport',
+      'company',
+      'restaurant',
+      'hotel',
+      'cause',
+      'band',
+      'government',
+      'non_profit',
+      'school',
+      'university',
+      'actor',
+      'athlete',
+      'city',
+      'country',
+      'album',
+      'book',
+      'drink',
+      'game',
+      'product',
+      'song',
+      'movie'
+    ],
+    when: answers => {
+      return answers.facebook
+    }
+  },
+  {
+    type: 'input',
+    name: 'facebookSiteName',
+    message: 'What\'s the name of your page on facebook',
+    when: answers => {
+      return answers.facebook
+    }
+  },
+  {
+    type: 'input',
+    name: 'facebookLocale',
+    message: 'What\'s the locale of your page on facebook',
+    when: answers => {
+      return answers.facebook
+    }
+  },
+  {
+    type: 'input',
+    name: 'facebookId',
+    message: 'What\'s the id of your page on facebook',
+    when: answers => {
+      return answers.facebook
+    }
+  },
+  {
+    type: 'input',
+    name: 'facebookAdmins',
+    message: 'What are the admins of your page on facebook',
+    when: answers => {
+      return answers.facebook
+    }
+  },
+  {
+    type: 'confirm',
+    name: 'twitter',
+    message: 'Do you wanna seo for twitter'
+  },
+  {
+    type: 'list',
+    name: 'twitterCard',
+    message: 'Which twitter do you want',
+    choices: [
+      'Summary',
+      'Product',
+      'Photo',
+      'Summary Large Image',
+      'Player',
+      'App',
+      'Gallery'
+    ],
+    when: answers => {
+      return answers.twitter
+    }
+  }
+]
+
+inquirer.prompt(questions).then(answers => {
+  const generatedSEO = seotopper(answers)
+  process.stdout.write(generatedSEO)
+})
diff --git a/lib/seotopper.js b/lib/seotopper.js
index 525f778..01743b5 100644
--- a/lib/seotopper.js
+++ b/lib/seotopper.js
@@ -1,15 +1,23 @@
 const utils = require('./utils')
 
-const checkMissingKeys = utils.checkMissingKeys
-const createErrorMessage = utils.createErrorMessage
 const requiredProperties = utils.requiredProperties
+const checkMissingKeys = utils.checkMissingKeys
+const createMissingKeysErrorMessage = utils.createMissingKeysErrorMessage
+const checkEmptyKeys = utils.checkEmptyKeys
+const createEmptyKeysErrorMessage = utils.createEmptyKeysErrorMessage
 
 function seotopper(args) {
   const keys = Object.keys(args)
   const missingKeys = checkMissingKeys(requiredProperties, keys)
 
   if (missingKeys.length > 0) {
-    throw new Error(createErrorMessage(missingKeys))
+    throw new Error(createMissingKeysErrorMessage(missingKeys))
+  }
+
+  const emptyKeys = checkEmptyKeys(requiredProperties, keys, args)
+
+  if (emptyKeys.length > 0) {
+    throw new Error(createEmptyKeysErrorMessage(emptyKeys))
   }
 
   return `<title>${args.title}</title>
@@ -35,21 +43,33 @@ function seotopper(args) {
 
     ${args.facebook ?
       `<!-- markup for facebook -->
-      <meta property="og:type" content="${args.facebook.type}"/>
+      <meta property="og:type" content="${args.facebookType}"/>
       <meta property="og:title" content="${args.title}"/>
-      <meta property="og:url" content="http://meusite.com.br"/>
-      <meta property="og:site_name" content="${args.facebook.siteName}"/>
+      <meta property="og:url" content="${args.canonical}"/>
+      ${args.facebookSiteName ?
+        `<meta property="og:site_name" content="${args.facebookSiteName}"/>` :
+        ''
+      }
       <meta property="og:image" content="${args.image}"/>
       <meta property="og:description" content="${args.description}"/>
-      <meta property="og:locale" content="${args.facebook.locale}"/>
-      <meta property="fb:app_id" content="${args.facebook.id}"/>
-      <meta property="fb:admins" content="${args.facebook.admins}"/>` :
+      ${args.facebookLocale ?
+        `<meta property="og:locale" content="${args.facebookLocale}"/>` :
+        ''
+      }
+      ${args.facebookId ?
+        `<meta property="fb:app_id" content="${args.facebookId}"/>` :
+        ''
+      }
+      ${args.facebookAdmins ?
+        `<meta property="fb:admins" content="${args.facebookAdmins}"/>` :
+        ''
+      }` :
       ''
     }
 
     ${args.twitter ?
       `<!-- markup for twitter -->
-      <meta name="twitter:card" content="${args.twitter.card}"/>
+      <meta name="twitter:card" content="${args.twitterCard}"/>
       <meta name="twitter:title" content="${args.title}"/>
       <meta name="twitter:description" content="${args.description}"/>
       <meta name="twitter:creator" content="${args.author}"/>
diff --git a/lib/utils.js b/lib/utils.js
index 68836d2..689628b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -10,15 +10,27 @@ const requiredProperties = [
 const checkMissingKeys = (requiredProperties, keys) => requiredProperties
   .filter(property => keys.indexOf(property) === -1)
 
-const createErrorMessage = missingKeys => String(
+const createMissingKeysErrorMessage = missingKeys => String(
   'The following ' +
   (missingKeys.length > 1 ? 'properties are' : 'property is') +
   ' required: ' +
-  missingKeys.join(', ')
+  missingKeys.sort().join(', ')
 )
 
+const checkEmptyKeys = (requiredProperties, keys, args) => keys
+  .filter(key => requiredProperties.indexOf(key) !== -1)
+  .filter(key => args[key] === '')
+
+const createEmptyKeysErrorMessage = emptyKeys => String(
+  'The following ' +
+  (emptyKeys.length > 1 ? 'properties' : 'property') +
+  ' cannot be empty: ' +
+  emptyKeys.sort().join(', ')
+)
 module.exports = {
   checkMissingKeys,
+  checkEmptyKeys,
   requiredProperties,
-  createErrorMessage
+  createMissingKeysErrorMessage,
+  createEmptyKeysErrorMessage
 }
diff --git a/package.json b/package.json
index 7acefb7..f206cd3 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,9 @@
   "author": "Gustavo Quinalha",
   "keywords": [],
   "license": "MIT",
+  "bin": {
+    "seotopper": "bin/seotopper.js"
+  },
   "main": "lib/seotopper.js",
   "scripts": {
     "precommit": "npm test",
@@ -31,7 +34,10 @@
     "husky": "^0.13.3",
     "xo": "^0.18.1"
   },
-  "engines" : {
+  "engines": {
     "node": ">=4"
+  },
+  "dependencies": {
+    "inquirer": "^3.0.6"
   }
 }
diff --git a/test/seotopper.test.js b/test/seotopper.test.js
index 46657fb..285d0b7 100644
--- a/test/seotopper.test.js
+++ b/test/seotopper.test.js
@@ -12,16 +12,14 @@ test('main funcionality', t => {
     robots: 'index/follow',
     themeColor: '#f00',
     image: 'https://sua-url.com.br/images/intro.jpg',
-    facebook: {
-      type: 'website',
-      siteName: 'Exemplo',
-      locale: 'pt_BR',
-      id: '5349',
-      admins: '123456789'
-    },
-    twitter: {
-      card: 'summary'
-    }
+    facebook: true,
+    facebookType: 'website',
+    facebookSiteName: 'Exemplo',
+    facebookLocale: 'pt_BR',
+    facebookId: '5349',
+    facebookAdmins: '123456789',
+    twitter: true,
+    twitterCard: 'summary'
   })
 
   const expected = `<title>Título da minha página</title>
@@ -42,7 +40,7 @@ test('main funcionality', t => {
 <!-- markup for facebook -->
 <meta property="og:type" content="website"/>
 <meta property="og:title" content="Título da minha página"/>
-<meta property="og:url" content="http://meusite.com.br"/>
+<meta property="og:url" content="https://sua-url.com.br"/>
 <meta property="og:site_name" content="Exemplo"/>
 <meta property="og:image" content="https://sua-url.com.br/images/intro.jpg"/>
 <meta property="og:description" content="Descrição da minha página"/>
@@ -79,16 +77,14 @@ test('base should be optional', t => {
     robots: 'index/follow',
     themeColor: '#f00',
     image: 'https://sua-url.com.br/images/intro.jpg',
-    facebook: {
-      type: 'website',
-      siteName: 'Exemplo',
-      locale: 'pt_BR',
-      id: '5349',
-      admins: '123456789'
-    },
-    twitter: {
-      card: 'summary'
-    }
+    facebook: true,
+    facebookType: 'website',
+    facebookSiteName: 'Exemplo',
+    facebookLocale: 'pt_BR',
+    facebookId: '5349',
+    facebookAdmins: '123456789',
+    twitter: true,
+    twitterCard: 'summary'
   })
 
   t.notRegex(actual, /rel="base"/)
@@ -103,16 +99,14 @@ test('sitemap should be optional', t => {
     robots: 'index/follow',
     themeColor: '#f00',
     image: 'https://sua-url.com.br/images/intro.jpg',
-    facebook: {
-      type: 'website',
-      siteName: 'Exemplo',
-      locale: 'pt_BR',
-      id: '5349',
-      admins: '123456789'
-    },
-    twitter: {
-      card: 'summary'
-    }
+    facebook: true,
+    facebookType: 'website',
+    facebookSiteName: 'Exemplo',
+    facebookLocale: 'pt_BR',
+    facebookId: '5349',
+    facebookAdmins: '123456789',
+    twitter: true,
+    twitterCard: 'summary'
   })
 
   t.notRegex(actual, /rel="sitemap"/)
@@ -126,16 +120,14 @@ test('themeColor should be optional', t => {
     canonical: 'https://sua-url.com.br',
     robots: 'index/follow',
     image: 'https://sua-url.com.br/images/intro.jpg',
-    facebook: {
-      type: 'website',
-      siteName: 'Exemplo',
-      locale: 'pt_BR',
-      id: '5349',
-      admins: '123456789'
-    },
-    twitter: {
-      card: 'summary'
-    }
+    facebook: true,
+    facebookType: 'website',
+    facebookSiteName: 'Exemplo',
+    facebookLocale: 'pt_BR',
+    facebookId: '5349',
+    facebookAdmins: '123456789',
+    twitter: true,
+    twitterCard: 'summary'
   })
 
   t.notRegex(actual, /name="theme-color"/)
@@ -151,9 +143,8 @@ test('facebook should be optional', t => {
     canonical: 'https://sua-url.com.br',
     robots: 'index/follow',
     image: 'https://sua-url.com.br/images/intro.jpg',
-    twitter: {
-      card: 'summary'
-    }
+    twitter: true,
+    twitterCard: 'summary'
   })
   t.notRegex(actual, /property="og:type"/)
   t.notRegex(actual, /property="og:title"/)
@@ -174,13 +165,12 @@ test('twitter should be optional', t => {
     canonical: 'https://sua-url.com.br',
     robots: 'index/follow',
     image: 'https://sua-url.com.br/images/intro.jpg',
-    facebook: {
-      type: 'website',
-      siteName: 'Exemplo',
-      locale: 'pt_BR',
-      id: '5349',
-      admins: '123456789'
-    }
+    facebook: true,
+    facebookType: 'website',
+    facebookSiteName: 'Exemplo',
+    facebookLocale: 'pt_BR',
+    facebookId: '5349',
+    facebookAdmins: '123456789'
   })
   t.notRegex(actual, /name="twitter:card"/)
   t.notRegex(actual, /name="twitter:title"/)
@@ -270,3 +260,94 @@ test('should give feedback for more than one required property', t => {
     })
   }, 'The following properties are required: author, description, title')
 })
+
+test('title cannot be empty', t => {
+  t.throws(() => {
+    seotopper({
+      title: '',
+      description: 'Descrição da minha página',
+      author: 'Eu',
+      canonical: 'https://sua-url.com.br',
+      robots: 'index/follow',
+      image: 'https://sua-url.com.br/images/intro.jpg'
+    })
+  }, 'The following property cannot be empty: title')
+})
+
+test('description cannot be empty', t => {
+  t.throws(() => {
+    seotopper({
+      title: 'Título da minha página',
+      description: '',
+      author: 'Eu',
+      canonical: 'https://sua-url.com.br',
+      robots: 'index/follow',
+      image: 'https://sua-url.com.br/images/intro.jpg'
+    })
+  }, 'The following property cannot be empty: description')
+})
+
+test('author cannot be empty', t => {
+  t.throws(() => {
+    seotopper({
+      title: 'Título da minha página',
+      description: 'Descrição da minha página',
+      author: '',
+      canonical: 'https://sua-url.com.br',
+      robots: 'index/follow',
+      image: 'https://sua-url.com.br/images/intro.jpg'
+    })
+  }, 'The following property cannot be empty: author')
+})
+
+test('canonical cannot be empty', t => {
+  t.throws(() => {
+    seotopper({
+      title: 'Título da minha página',
+      author: 'Eu',
+      description: 'Descrição da minha página',
+      canonical: '',
+      robots: 'index/follow',
+      image: 'https://sua-url.com.br/images/intro.jpg'
+    })
+  }, 'The following property cannot be empty: canonical')
+})
+
+test('robots cannot be empty', t => {
+  t.throws(() => {
+    seotopper({
+      title: 'Título da minha página',
+      author: 'Eu',
+      description: 'Descrição da minha página',
+      canonical: 'https://sua-url.com.br',
+      robots: '',
+      image: 'https://sua-url.com.br/images/intro.jpg'
+    })
+  }, 'The following property cannot be empty: robots')
+})
+
+test('image cannot be empty', t => {
+  t.throws(() => {
+    seotopper({
+      title: 'Título da minha página',
+      author: 'Eu',
+      description: 'Descrição da minha página',
+      canonical: 'https://sua-url.com.br',
+      robots: 'index/follow',
+      image: ''
+    })
+  }, 'The following property cannot be empty: image')
+})
+
+test('should give feedback for more than one empty property', t => {
+  t.throws(() => {
+    seotopper({
+      title: '',
+      description: '',
+      author: '',
+      canonical: 'https://sua-url.com.br',
+      robots: 'index/follow',
+      image: 'https://sua-url.com.br/images/intro.jpg'
+    })
+  }, 'The following properties cannot be empty: author, description, title')
+})
diff --git a/test/utils.test.js b/test/utils.test.js
index 9107da2..9adc97f 100644
--- a/test/utils.test.js
+++ b/test/utils.test.js
@@ -2,7 +2,9 @@ const test = require('ava')
 const {
   requiredProperties,
   checkMissingKeys,
-  createErrorMessage
+  createMissingKeysErrorMessage,
+  checkEmptyKeys,
+  createEmptyKeysErrorMessage
 } = require('../lib/utils')
 
 test('requiredProperties should be an array', t => {
@@ -18,16 +20,44 @@ test('checkMissingKeys', t => {
   t.deepEqual(actual, expected, 'should return the missing keys')
 })
 
-test('createErrorMessage missing one key', t => {
-  const actual = createErrorMessage(['title'])
+test('createMissingKeysErrorMessage missing one key', t => {
+  const actual = createMissingKeysErrorMessage(['title'])
   const expected = 'The following property is required: title'
 
   t.is(actual, expected)
 })
 
-test('createErrorMessage missign more than one key', t => {
-  const actual = createErrorMessage(['title', 'author'])
-  const expected = 'The following properties are required: title, author'
+test('createMissingKeysErrorMessage missing more than one key', t => {
+  const actual = createMissingKeysErrorMessage(['title', 'author'])
+  const expected = 'The following properties are required: author, title'
+
+  t.is(actual, expected)
+})
+
+test('checkEmptyKeys', t => {
+  const actual = checkEmptyKeys(
+    ['title', 'author'],
+    ['title', 'author'],
+    {
+      title: '',
+      author: 'me'
+    }
+  )
+  const expected = ['title']
+
+  t.deepEqual(actual, expected)
+})
+
+test('createEmptyKeysErrorMessage with one empty key', t => {
+  const actual = createEmptyKeysErrorMessage(['title'])
+  const expected = 'The following property cannot be empty: title'
+
+  t.is(actual, expected)
+})
+
+test('createEmptyKeysErrorMessage with more than one empty key', t => {
+  const actual = createEmptyKeysErrorMessage(['title', 'author'])
+  const expected = 'The following properties cannot be empty: author, title'
 
   t.is(actual, expected)
 })