diff --git a/Gruntfile.js b/Gruntfile.js
index 478b42c..1aa5b89 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -8,11 +8,52 @@ module.exports = function(grunt) {
             banner: '/*! Cache API Key/Value Store v<%= pkg.version %>\n * (c) https://github.com/optimalisatie */\n'
         },
 
+        // minify
+        uglify: {
+
+            "cache-api-keyval": {
+                options: {
+                    compress: {
+                        global_defs: {
+                            "SILENT": false
+                        }
+                    },
+                    mangle: {},
+                    dead_code: true,
+                    banner: ''
+                },
+                files: {
+                    'min/cache-api-keyval.js': [
+                        'src/cache-api-keyval.js'
+                    ]
+                }
+            },
+
+            "cache-api-keyval-silent": {
+                options: {
+                    compress: {
+                        global_defs: {
+                            "SILENT": true
+                        }
+                    },
+                    mangle: {},
+                    dead_code: true,
+                    banner: ''
+                },
+                files: {
+                    'min/cache-api-keyval.silent.js': [
+                        'src/cache-api-keyval.js'
+                    ]
+                }
+            }
+
+        },
+
         // closure compiler
         "closure-compiler": {
             "cache-api-keyval": {
                 closurePath: 'closure-compiler',
-                js: 'src/cache-api-keyval.js',
+                js: 'min/cache-api-keyval.js',
                 jsOutputFile: 'dist/cache-api-keyval.js',
                 maxBuffer: 10000,
                 options: {
@@ -21,6 +62,19 @@ module.exports = function(grunt) {
                     externs: ['cache-api-keyval.ext.js'],
                     define: ['DEBUG=false']
                 }
+            },
+
+            "cache-api-keyval-silent": {
+                closurePath: 'closure-compiler',
+                js: 'min/cache-api-keyval.silent.js',
+                jsOutputFile: 'dist/cache-api-keyval.silent.js',
+                maxBuffer: 10000,
+                options: {
+                    compilation_level: 'ADVANCED_OPTIMIZATIONS',
+                    language_in: 'ECMASCRIPT5_STRICT',
+                    externs: ['cache-api-keyval.ext.js'],
+                    define: ['DEBUG=false']
+                }
             }
         }
     });
@@ -29,7 +83,8 @@ module.exports = function(grunt) {
     require('matchdep').filterDev('grunt-*').forEach(grunt.loadNpmTasks);
 
     grunt.registerTask('build', [
-        'closure-compiler:cache-api-keyval'
+        'uglify',
+        'closure-compiler'
     ]);
     grunt.registerTask('default', ['']);
 };
\ No newline at end of file
diff --git a/README.md b/README.md
index fbf96eb..6481fed 100644
--- a/README.md
+++ b/README.md
@@ -67,4 +67,22 @@ window.CacheApiDBFallback = function(store, options) {
     this.del = function(key) { /* delete key from store */ }
     this.prune = function() { /* cleanup database */ }
 };
-```
\ No newline at end of file
+```
+
+## Tinier
+
+`cache-api-keyval.silent.js` is a stripped version without error reporting and fallback mechanism. It can be used with manual Cache API verification.
+
+
+```html
+<script src="/cache-api-keyval.silent.js"></script>
+<script>
+
+// check if Cache API is available
+if ("caches" in window) {
+
+    // load database
+    var db = new CacheApiDB('my-store', { namespace: 'optional' });
+
+    // ...
+}
diff --git a/dist/cache-api-keyval.js b/dist/cache-api-keyval.js
index 84cf64c..d45adcf 100644
--- a/dist/cache-api-keyval.js
+++ b/dist/cache-api-keyval.js
@@ -1,5 +1,5 @@
-(function(h){function l(c){c&&(a.CacheApiDB=c);for(c=k.shift();c;)c()}var a="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,k=[];a.onCacheApiDB=function(c){a.CacheApiDB?c():k.push(c)};a.CacheApiDBFallback||(a.CacheApiDBFallback=function(){var c=this;c.no=1;["get","set","del","prune"].forEach(function(a){c[a]=function(){return Promise.reject("No Cache API")}})});"caches"in a&&caches instanceof CacheStorage?(a.CacheApiDB=h(),caches.open("x")["catch"](function(c){"SecurityError"!=
-c.name&&console&&console.error("Cache API: "+c.message);l(a.CacheApiDBFallback)}).then(function(){l()})):(console&&console.error("No Cache API"),a.CacheApiDB=a.CacheApiDBFallback)})(function(){function h(d,b){return caches.open(d).then(b)}function l(d,b){return h(d,function(f){m(b)&&n();var e=new Request((b||"").toString());return f.match(e).then(function(b){return!b||k(d,e,b)?!1:b.json()})})}function a(d,b,f,e){return h(d,function(d){(m(b)||m(f))&&n();var c=new Request((b||"").toString()),a={"Content-Type":"application/json"};
-f=JSON.stringify(f);e&&(a["x-d"]=Math.round(Date.now()/1E3),e=parseInt(e),(isNaN(e)||0>e)&&n(),a["x-e"]=e.toString());a=new Response(f,{headers:a});return d.put(c,a)})}function k(d,b,a){var e=a.headers.get("x-e");a=a.headers.get("x-d");if(e&&a&&(e=parseInt(e),a=parseInt(a),a+e<Math.round(Date.now()/1E3)))return c(d,b,1),!0}function c(d,b,a){return h(d,function(d){m(b)&&n();b=a?b:new Request((b||"").toString());return d["delete"](b)})}function q(d){return h(d,function(b){return b.keys().then(function(a){var c=
-[];a.forEach(function(a){c.push(b.match(a))});return Promise.all(c).then(function(a){a.forEach(function(a,b){k(d,b,a)})})})})}function g(a,b){if(this instanceof g)this.a=a,"object"===typeof b&&b.namespace&&(this.b=b.namespace);else return new g(a,b)}function p(a,b){return(a?a+":":"")+b}function m(a){return"undefined"===typeof a}function n(){throw Error("input");}g.prototype.get=function(a){return l(this.a,p(this.b,a))};g.prototype.set=function(c,b,f){return a(this.a,p(this.b,c),b,f)};g.prototype.del=
-function(a){return c(this.a,p(this.b,a))};g.prototype.prune=function(){return q(this.a)};return g});
+!function(){function g(a){a&&(b.CacheApiDB=a);for(a=p.shift();a;)a()}var b="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,p=[];b.onCacheApiDB=function(a){b.CacheApiDB?a():p.push(a)};b.CacheApiDBFallback||(b.CacheApiDBFallback=function(){var a=this;a.no=1;["get","set","del","prune"].forEach(function(b){a[b]=function(){return Promise.reject("No Cache API")}})});"caches"in b&&caches instanceof CacheStorage?(b.CacheApiDB=function(){function a(d,
+c){return caches.open(d).then(c)}function b(d,c,a){var b=a.headers.get("x-e");a=a.headers.get("x-d");if(b&&a&&(b=parseInt(b),parseInt(a)+b<Math.round(Date.now()/1E3)))return g(d,c,1),!0}function g(d,c,b){return a(d,function(a){return k(c)&&l(),c=b?c:new Request((c||"").toString()),a["delete"](c)})}function e(a,c){if(!(this instanceof e))return new e(a,c);this.a=a;"object"===typeof c&&c.namespace&&(this.b=c.namespace)}function m(a,c){return(a?a+":":"")+c}function k(a){return"undefined"===typeof a}
+function l(){throw Error("input");}return e.prototype.get=function(d){return c=this.a,e=m(this.b,d),a(c,function(a){k(e)&&l();var d=new Request((e||"").toString());return a.match(d).then(function(a){return!(!a||b(c,d,a))&&a.json()})});var c,e},e.prototype.set=function(b,c,e){return d=this.a,n=m(this.b,b),h=c,f=e,a(d,function(a){(k(n)||k(h))&&l();var c=new Request((n||"").toString()),b={"Content-Type":"application/json"};h=JSON.stringify(h);f&&(b["x-d"]=Math.round(Date.now()/1E3),f=parseInt(f),(isNaN(f)||
+0>f)&&l(),b["x-e"]=f.toString());b=new Response(h,{headers:b});return a.put(c,b)});var d,n,h,f},e.prototype.del=function(a){return g(this.a,m(this.b,a))},e.prototype.prune=function(){return a(d=this.a,function(a){return a.keys().then(function(c){var e=[];return c.forEach(function(b){e.push(a.match(b))}),Promise.all(e).then(function(a){a.forEach(function(a,c){b(d,c,a)})})})});var d},e}(),caches.open("x")["catch"](function(a){"SecurityError"!=a.name&&console&&console.error("Cache API: "+a.message);
+g(b.CacheApiDBFallback)}).then(function(){g()})):(console&&console.error("No Cache API"),b.CacheApiDB=b.CacheApiDBFallback)}();
diff --git a/dist/cache-api-keyval.silent.js b/dist/cache-api-keyval.silent.js
new file mode 100644
index 0000000..c5047a2
--- /dev/null
+++ b/dist/cache-api-keyval.silent.js
@@ -0,0 +1,4 @@
+!function(){var g="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this;"caches"in g&&caches instanceof CacheStorage&&(g.CacheApiDB=function(){function k(a,b){return caches.open(a).then(b)}function g(a,b,c){var d=c.headers.get("x-e");c=c.headers.get("x-d");if(d&&c&&(d=parseInt(d),parseInt(c)+d<Math.round(Date.now()/1E3)))return p(a,b,1),!0}function p(a,b,c){return k(a,function(a){return l(b)&&m(),b=c?b:new Request((b||"").toString()),a["delete"](b)})}
+function e(a,b){if(!(this instanceof e))return new e(a,b);this.a=a;"object"===typeof b&&b.namespace&&(this.b=b.namespace)}function n(a,b){return(a?a+":":"")+b}function l(a){return"undefined"===typeof a}function m(){throw Error();}return e.prototype.get=function(a){return b=this.a,c=n(this.b,a),k(b,function(a){l(c)&&m();var d=new Request((c||"").toString());return a.match(d).then(function(a){return!(!a||g(b,d,a))&&a.json()})});var b,c},e.prototype.set=function(a,b,c){return d=this.a,e=n(this.b,a),
+h=b,f=c,k(d,function(a){(l(e)||l(h))&&m();var b=new Request((e||"").toString()),c={"Content-Type":"application/json"};h=JSON.stringify(h);f&&(c["x-d"]=Math.round(Date.now()/1E3),f=parseInt(f),(isNaN(f)||0>f)&&m(),c["x-e"]=f.toString());c=new Response(h,{headers:c});return a.put(b,c)});var d,e,h,f},e.prototype.del=function(a){return p(this.a,n(this.b,a))},e.prototype.prune=function(){return k(a=this.a,function(b){return b.keys().then(function(c){var d=[];return c.forEach(function(a){d.push(b.match(a))}),
+Promise.all(d).then(function(b){b.forEach(function(b,c){g(a,c,b)})})})});var a},e}())}();
diff --git a/package.json b/package.json
index aa1bd23..3a1e59b 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,22 @@
 {
     "name": "cache-api-keyval",
-    "version": "1.0.9",
+    "version": "1.0.10",
     "description": "Browser Cache API key/value store with +50MB capacity, expiration and JSON object data-type storage.",
     "author": {
         "name": "info@optimization.team",
         "email": "info@optimization.team",
         "web": "optimization.team"
     },
-    "keywords": ["Cache", "IndexedDB", "Cache API", "CacheStorage", "keyvalue", "keyval", "key/value", "localstorage"],
+    "keywords": [
+        "Cache",
+        "IndexedDB",
+        "Cache API",
+        "CacheStorage",
+        "keyvalue",
+        "keyval",
+        "key/value",
+        "localstorage"
+    ],
     "homepage": "https://github.com/optimalisatie/",
     "copyright": "Copyright (C) 2018 Optimization.Team, Utrecht, NLD",
     "main": "cache-api-keyval.js",
@@ -22,6 +31,7 @@
     "devDependencies": {
         "grunt": "latest",
         "grunt-closure-compiler": "latest",
+        "grunt-contrib-uglify": "latest",
         "matchdep": "latest",
         "merge": "latest"
     }
diff --git a/src/cache-api-keyval.js b/src/cache-api-keyval.js
index af329c5..a67817b 100644
--- a/src/cache-api-keyval.js
+++ b/src/cache-api-keyval.js
@@ -9,75 +9,90 @@
 
     var _root = ("undefined" != typeof window ? window : "undefined" != typeof global ? global : "undefined" != typeof self ? self : this);
 
-    function print_error(msg) {
-        if (console) {
-            console.error(msg);
+    // filtered out by Google Closure Compiler to create .silent.js version
+    if (!SILENT) {
+        function print_error(msg) {
+            if (console) {
+                console.error(msg);
+            }
         }
-    }
 
-    var queue = [];
-    _root.onCacheApiDB = function(callback) {
-        if (_root.CacheApiDB) {
-            callback();
-        } else {
-            queue.push(callback);
+
+        var queue = [];
+        _root.onCacheApiDB = function(callback) {
+            if (_root.CacheApiDB) {
+                callback();
+            } else {
+                queue.push(callback);
+            }
         }
-    }
 
-    // set cache api db controller
-    function setCacheApiDB(fallbackFactory) {
+        // set cache api db controller
+        function setCacheApiDB(fallbackFactory) {
 
-        // set fallback
-        if (fallbackFactory) {
-            _root.CacheApiDB = fallbackFactory;
-        }
+            // set fallback
+            if (fallbackFactory) {
+                _root.CacheApiDB = fallbackFactory;
+            }
 
-        // process callback queue
-        var callback = queue.shift();
-        while (callback) {
-            callback();
+            // process callback queue
+            var callback = queue.shift();
+            while (callback) {
+                callback();
+            }
         }
-    }
 
-    var nosupport_error = 'No Cache API';
+        var nosupport_error = 'No Cache API';
 
-    if (!_root.CacheApiDBFallback) {
-        _root.CacheApiDBFallback = function() {
-            var that = this;
-            that.no = 1;
-            ['get', 'set', 'del', 'prune'].forEach(function(method) {
-                that[method] = function() {
-                    return Promise.reject(nosupport_error);
-                }
-            });
+        if (!_root.CacheApiDBFallback) {
+            _root.CacheApiDBFallback = function() {
+                var that = this;
+                that.no = 1;
+                ['get', 'set', 'del', 'prune'].forEach(function(method) {
+                    that[method] = function() {
+                        return Promise.reject(nosupport_error);
+                    }
+                });
+            }
         }
     }
 
     // detect Cache API support
     if (!("caches" in _root) || !(caches instanceof CacheStorage)) {
-        print_error(nosupport_error);
-        _root.CacheApiDB = _root.CacheApiDBFallback;
+
+        // filtered out by Google Closure Compiler to create .silent.js version
+        if (SILENT) {
+            return;
+        } else {
+            print_error(nosupport_error);
+            _root.CacheApiDB = _root.CacheApiDBFallback;
+        }
     } else {
 
         // enable instant usage of Cache API store
         _root.CacheApiDB = factory();
 
-        // test if Cache API is blocked by browser privacy settings
-        caches.open('x').catch(function(e) {
+        // filtered out by Google Closure Compiler to create .silent.js version
+        if (!SILENT) {
 
-            // report errors unrelated to privacy settings
-            if (e.name != 'SecurityError') {
-                print_error('Cache API: ' + e.message);
-            }
+            // test if Cache API is blocked by browser privacy settings
+            caches.open('x').catch(function(e) {
 
-            // fallback
-            setCacheApiDB(_root.CacheApiDBFallback);
+                // report errors unrelated to privacy settings
+                if (e.name != 'SecurityError') {
+                    print_error('Cache API: ' + e.message);
+                }
 
-        }).then(function() {
+                // fallback
+                setCacheApiDB(_root.CacheApiDBFallback);
 
-            // continue with Cache API
-            setCacheApiDB();
-        })
+            }).then(function() {
+
+                // continue with Cache API
+                setCacheApiDB();
+            });
+
+        }
 
     }
 })(function() {
@@ -270,7 +285,13 @@
 
     // output error
     function ERROR(msg) {
-        throw new Error(msg || 'input');
+
+        // filtered out by Google Closure Compiler to create .silent.js version
+        if (SILENT) {
+            throw Error();
+        } else {
+            throw Error(msg || 'input');
+        }
     }
 
     // public get method