diff --git a/.env b/.env
new file mode 100644
index 0000000..c8a6d4a
--- /dev/null
+++ b/.env
@@ -0,0 +1,4 @@
+# This is for tests only
+API_KEY=123
+ADMIN_EMAIL=alemagio@github.com
+EMAIL_CONFIG_JSON={ "foo": 42 }
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..c8d01a6
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,19 @@
+name: CI workflow
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+        os: [ubuntu-latest, windows-latest]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Install Dependencies
+      run: npm install --ignore-scripts
+    - name: Test
+      run: npm run test
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1e8a627
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,61 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+
+# mac files
+.DS_Store
+
+# vim swap files
+*.swp
+
+# marko generated files
+*.marko.js
+# yarn.lock
+
+# lock files
+yarn.lock
+package-lock.json
+
+# IDE/editors
+.vscode
+.idea
+
+# temporary/work/output folders
+# build/
+out/
+temp/
+tmp/
diff --git a/.taprc b/.taprc
new file mode 100644
index 0000000..1721b52
--- /dev/null
+++ b/.taprc
@@ -0,0 +1,4 @@
+esm: false
+ts: false
+jsx: false
+coverage: false
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f5762de
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Alessandro Magionami
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f2db772
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+# fastify-envalid
+
+[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](http://standardjs.com/)  ![CI workflow](__MY_PLUGIN_URL__
+/workflows/CI%20workflow/badge.svg)
+
+Supports Fastify versions `3.x`
+
+## Install
+```
+npm i fastify-envalid
+```
+
+## Usage
+Require `fastify-envalid` and register.
+```js
+const fastify = require('fastify')()
+
+fastify.register(require('fastify-envalid'))
+
+fastify.listen(3000)
+```
+
+The plugin will create 3 decorators on your `fastify` instance:
+
+* `cleanEnv` - A function which is exactly `envalid` [cleanEnv](https://github.com/af/envalid/blob/master/README.md#envalidcleanenvenvironment-validators-options)
+* `validators` - An object that contains all the `envalid` [validators](https://github.com/af/envalid/blob/master/README.md#validator-types)
+* `makeValidator` - A function which is exactly `envalid` [makeValidators](https://github.com/af/envalid/blob/master/README.md#custom-validators)
+
+## Acknowledgements
+
+The code is a port for Fastify of [`envalid`](https://github.com/af/envalid).
+
+## License
+
+Licensed under [MIT](./LICENSE).<br/>
diff --git a/examples/basic/server.js b/examples/basic/server.js
new file mode 100644
index 0000000..14e2a2f
--- /dev/null
+++ b/examples/basic/server.js
@@ -0,0 +1,18 @@
+const fastify = require('fastify')
+const fastifyEnvalid = require('../..')
+
+const app = fastify({ logger: true })
+
+app.register(fastifyEnvalid)
+
+app.get('/', async (req, res) => {
+  const env = app.cleanEnv(process.env, {
+    API_KEY: app.validators.str(),
+    ADMIN_EMAIL: app.validators.email({ default: 'admin@example.com' }),
+    EMAIL_CONFIG_JSON: app.validators.json({ desc: 'Additional email parameters' })
+  })
+
+  return { API_KEY: env.API_KEY, ADMIN_EMAIL: env.ADMIN_EMAIL, EMAIL_CONFIG_JSON: env.EMAIL_CONFIG_JSON }
+})
+
+app.listen(3000)
diff --git a/examples/typescript/server.ts b/examples/typescript/server.ts
new file mode 100644
index 0000000..c21d5ea
--- /dev/null
+++ b/examples/typescript/server.ts
@@ -0,0 +1,18 @@
+import fastify from 'fastify'
+import fastifyEnvalid from '../..'
+
+const app = fastify({ logger: true })
+
+app.register(fastifyEnvalid)
+
+app.get('/', async (req, res) => {
+  const env = app.cleanEnv(process.env, {
+    API_KEY: app.validators.str(),
+    ADMIN_EMAIL: app.validators.email({ default: 'admin@example.com' }),
+    EMAIL_CONFIG_JSON: app.validators.json({ desc: 'Additional email parameters' })
+  })
+
+  return { API_KEY: env.API_KEY, ADMIN_EMAIL: env.ADMIN_EMAIL, EMAIL_CONFIG_JSON: env.EMAIL_CONFIG_JSON }
+})
+
+app.listen(3000)
diff --git a/examples/typescript/tsconfig.json b/examples/typescript/tsconfig.json
new file mode 100644
index 0000000..2be494f
--- /dev/null
+++ b/examples/typescript/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "module": "esnext",
+    "target": "es2017"
+  }
+}
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..308355f
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,48 @@
+import { FastifyPlugin } from 'fastify'
+import { Spec, ValidatorSpec, CleanOptions, StrictCleanOptions, CleanEnv } from 'envalid'
+
+declare module 'fastify' {
+  export interface FastifyInstance {
+    validators: Validators
+    cleanEnv: CleanEnvFunction
+    makeValidator: <T>(
+      parser: (input: string) => T,
+      type?: string
+    ) => (spec?: Spec<T>) => ValidatorSpec<T>
+  }
+}
+
+export interface Validators {
+
+  bool: <T extends boolean = boolean>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  num: <T extends number = number>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  str: <T extends string = string>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  json: <T = any>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  url: <T extends string = string>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  email: <T extends string = string>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  host: <T extends string = string>(spec?: Spec<T>) => ValidatorSpec<T>
+
+  port: <T extends number = number>(spec?: Spec<T>) => ValidatorSpec<T>
+
+}
+
+export declare type CleanEnvFunction = <T>(
+  environment: unknown,
+  validators?: { [K in keyof T]: ValidatorSpec<T[K]> },
+  options?: CleanOptions
+) => Readonly<T> & CleanEnv
+
+export declare type StrictCleanEnvFunction = <T>(
+  environment: unknown,
+  validators?: { [K in keyof T]: ValidatorSpec<T[K]> },
+  options?: StrictCleanOptions
+) => Readonly<T> & CleanEnv & { readonly [varName: string]: string | undefined }
+
+declare const fastifyEnvalid: FastifyPlugin
+export default fastifyEnvalid
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..0e74611
--- /dev/null
+++ b/index.js
@@ -0,0 +1,28 @@
+'use strict'
+
+const fp = require('fastify-plugin')
+const {
+  str,
+  bool,
+  num,
+  email,
+  host,
+  url,
+  json,
+  cleanEnv,
+  makeValidator
+} = require('envalid')
+
+module.exports = fp(async function (fastify, opts) {
+  fastify.decorate('validators', {
+    str,
+    bool,
+    num,
+    email,
+    host,
+    url,
+    json
+  })
+  fastify.decorate('cleanEnv', cleanEnv)
+  fastify.decorate('makeValidator', makeValidator)
+}, { fastify: '3.x' })
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..a2fc046
--- /dev/null
+++ b/package.json
@@ -0,0 +1,45 @@
+{
+  "name": "fastify-envalid",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "npm run lint && npm run unit && npm run test:typescript",
+    "lint": "standard && npm run lint:typescript",
+    "lint:typescript": "ts-standard",
+    "test:typescript": "tsd",
+    "unit": "tap test/**/*.test.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "MIT",
+  "types": "index.d.ts",
+  "dependencies": {
+    "envalid": "^6.0.2",
+    "fastify-plugin": "^3.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^14.0.18",
+    "fastify": "^3.8.0",
+    "fastify-tsconfig": "^1.0.0",
+    "standard": "^14.3.3",
+    "tap": "^14.0.0",
+    "ts-standard": "^9.0.0",
+    "tsd": "^0.13.1",
+    "typescript": "^4.0.2"
+  },
+  "tsd": {
+    "directory": "test"
+  },
+  "files": [
+    "index.d.ts"
+  ],
+  "ts-standard": {
+    "ignore": [
+      "examples"
+    ]
+  }
+}
diff --git a/test/index.test-d.ts b/test/index.test-d.ts
new file mode 100644
index 0000000..8be8261
--- /dev/null
+++ b/test/index.test-d.ts
@@ -0,0 +1,19 @@
+import fastify from 'fastify'
+import fastifyEnvalid, { Validators, CleanEnvFunction, StrictCleanEnvFunction } from '..'
+import { expectType } from 'tsd'
+import { Spec, ValidatorSpec } from 'envalid'
+
+let app
+try {
+  app = fastify()
+  await app.ready()
+  await app.register(fastifyEnvalid)
+  expectType<Validators>(app.validators)
+  expectType<CleanEnvFunction|StrictCleanEnvFunction>(app.cleanEnv)
+  expectType<<T>(
+  parser: (input: string) => T,
+  type?: string
+  ) => (spec?: Spec<T>) => ValidatorSpec<T>>(app.makeValidator)
+} catch (err) {
+  console.error(err)
+}
diff --git a/test/index.test.js b/test/index.test.js
new file mode 100644
index 0000000..026c5ab
--- /dev/null
+++ b/test/index.test.js
@@ -0,0 +1,47 @@
+const { test } = require('tap')
+const {
+  str,
+  bool,
+  num,
+  email,
+  host,
+  url,
+  json,
+  cleanEnv,
+  makeValidator
+} = require('envalid')
+
+test('should register the correct decorators', async t => {
+  t.plan(6)
+
+  const app = require('fastify')()
+
+  app.register(require('..'))
+
+  await app.ready()
+
+  t.true(app.hasDecorator('validators'))
+  t.deepEqual(app.validators, {
+    str,
+    bool,
+    num,
+    email,
+    host,
+    url,
+    json
+  })
+  t.true(app.hasDecorator('cleanEnv'))
+  t.deepEqual(app.cleanEnv, cleanEnv)
+  t.true(app.hasDecorator('makeValidator'))
+  t.deepEqual(app.makeValidator, makeValidator)
+})
+
+test('should produce the correct env', async t => {
+  t.plan(1)
+  const app = require('fastify')()
+
+  app.register(require('..'))
+
+  await app.ready()
+  t.deepEqual(app.cleanEnv(process.env), cleanEnv(process.env))
+})
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..7ddf54e
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,10 @@
+{
+    "extends": "fastify-tsconfig",
+    "compilerOptions": {
+      "noEmit": true,
+      "esModuleInterop": true
+    },
+    "include": [
+        "**/*.ts"
+    ]
+}