diff --git a/src/cmd/cmd.gen.js b/src/cmd/cmd.gen.js
index 6693a26..47e5a10 100644
--- a/src/cmd/cmd.gen.js
+++ b/src/cmd/cmd.gen.js
@@ -81,6 +81,13 @@ function generateTemplate(config) {
     return template   
 }
 
+function writeToFile(config, template) {
+    console.trace('cmd.gen.writeToFile')
+    console.debug(`Write to ${config.output}`)
+
+    fs.writeFileSync(config.output, JSON.stringify(template, null, '\t'))
+}
+
 function prepare(config) {
     console.trace('cmd.gen.prepare')
     prepareUserDir(config)
@@ -106,12 +113,18 @@ module.exports = {
             '--template <template-path>': 'Path to a template spec to use for generation. (optional)',
             '--info <info-path>': "Path to an info template. (optional)",
             '--annotations <annotations-path>': "Path to an annotations template. (optional)",
-            '--out <output-path>': "Path to output the generated template. (optional)"
+            '--out <output-path>': "Path to output the generated template. (optional)",
+            '--quiet, -q': "Do not create the spec file, just output it to stdout. (optional)"
         }
     },
     run(args) {
         let config = prepare({ args })
         let spec = generateTemplate(config)
+
+        if(!args.q && !args.quiet) {
+            writeToFile(config, spec)
+        }
+
         return spec
     }
 
diff --git a/tests/cmd.test.js b/tests/cmd.test.js
index fb57e7e..ab0af84 100644
--- a/tests/cmd.test.js
+++ b/tests/cmd.test.js
@@ -2,51 +2,70 @@ const assert = require('assert').strict
 const loader = require('../src/loader')
 const logging = require('../src/logging')
 const expect = require('chai').expect
+const fs = require('fs')
+const path = require('path')
 
 logging.init(-1)
 const commands = loader.load()
 
 
 describe("gen command", () => {
+
+    const test_spec = { 
+        name: 'test-service', 
+        description: 'Description for service.',
+        baseurl: 'https://nclazz.de',
+        namespace: 'de.nclazz' ,
+        quiet: true
+    }
+
     it('throws an error on missing name', () => {
-        expect(() => commands.gen.run({ })).to.throw('Name must not be empty!')
+        expect(() => commands.gen.run({ quiet: true })).to.throw('Name must not be empty!')
     })
     it('throws an error on missing description', () => {
-        expect(() => commands.gen.run({ name: 'testename' })).to.throw('Description must not be empty!')
+        expect(() => commands.gen.run({ name: 'testename', quiet: true })).to.throw('Description must not be empty!')
     })
     it('generates a spec', () => {
-        let spec = commands.gen.run({ 
-            name: 'test-service', 
-            description: 'Description for service.',
-            baseurl: 'https://nclazz.de',
-            namspace: 'de.nclazz' 
-        }); 
+        let spec = commands.gen.run(test_spec); 
         expect(spec).to.not.equal(null)
         expect(spec).to.not.equal(undefined)
         expect(spec).to.not.equal({})
     })
     it('includes [name, description, base_url, namespace] as top level properties', () => {
-        let spec = commands.gen.run({ 
-            name: 'test-service', 
-            description: 'Description for service.',
-            baseurl: 'https://nclazz.de',
-            namespace: 'de.nclazz' 
-        }); 
+        let spec = commands.gen.run(test_spec); 
         expect(spec).to.have.ownProperty('name')
         expect(spec).to.have.ownProperty('description')
         expect(spec).to.have.ownProperty('base_url')
         expect(spec).to.have.ownProperty('namespace')
     })
     it('correctly propagates [name, description, base_url, namespace] to spec', () => {
-        let spec = commands.gen.run({ 
-            name: 'test-service', 
-            description: 'Description for service.',
-            baseurl: 'https://nclazz.de',
-            namespace: 'de.nclazz' 
-        }); 
+        let spec = commands.gen.run(test_spec); 
         expect(spec.name).to.equal('test-service')
         expect(spec.description).to.equal('Description for service.')
         expect(spec.base_url).to.equal('https://nclazz.de')
         expect(spec.namespace).to.equal('de.nclazz')
     })
+    it('does not creates a file in quiet mode', () => {
+        let spec = commands.gen.run({
+            ...test_spec,
+            out: './test-spec.json'
+        }); 
+        expect(fs.existsSync('./test-spec.json')).to.equal(false)
+    })
+    it('creates a file with valid json spec', () => {
+        let spec_path = path.join(__dirname, 'test-spec.json')
+        commands.gen.run({
+            ...test_spec,
+            out: spec_path,
+            quiet: false
+        }); 
+        expect(fs.existsSync(spec_path)).to.equal(true)
+        let spec_json = require(spec_path) 
+        expect(spec_json).to.have.ownProperty('name')
+        expect(spec_json).to.have.ownProperty('description')
+        expect(spec_json).to.have.ownProperty('base_url')
+        expect(spec_json).to.have.ownProperty('namespace')
+        fs.unlinkSync(spec_path)
+    })
+
 })
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