diff --git a/private/lib/linux/librktwebview_qt.so b/private/lib/linux/librktwebview_qt.so
index 49165c4..927c26c 100755
Binary files a/private/lib/linux/librktwebview_qt.so and b/private/lib/linux/librktwebview_qt.so differ
diff --git a/private/racket-webview-qt.rkt b/private/racket-webview-qt.rkt
index b360189..4beed4c 100644
--- a/private/racket-webview-qt.rkt
+++ b/private/racket-webview-qt.rkt
@@ -36,6 +36,8 @@
          rkt-webview-valid?
          rkt-webview-open-devtools
          rkt-webview-choose-dir
+         rkt-webview-file-open
+         rkt-webview-file-save
          )
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -270,6 +272,15 @@
 (define-rktwebview rkt_webview_choose_dir
   (_fun _int _string/utf-8 _string/utf-8 -> _rkt_js_result_t-pointer))
 
+;RKTWEBVIEW_QT_EXPORT rkt_js_result_t *rkt_webview_file_open(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts);
+(define-rktwebview rkt_webview_file_open
+  (_fun _int _string/utf-8 _string/utf-8 _string/utf-8 -> _rkt_js_result_t-pointer))
+
+;RKTWEBVIEW_QT_EXPORT rkt_js_result_t *rkt_webview_file_save(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts);
+(define-rktwebview rkt_webview_file_save
+  (_fun _int _string/utf-8 _string/utf-8 _string/utf-8 -> _rkt_js_result_t-pointer))
+
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Initialize and start library
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -400,6 +411,20 @@
     (rkt_webview_destroy_js_result r)
     (list result value)))
 
+(define (rkt-webview-file-open wv title base-dir permitted-exts)
+  (let* ((r (rkt_webview_file_open (rkt-wv-win wv) title base-dir permitted-exts))
+         (value (cast (rkt_js_result_t-value r) _pointer _string*/utf-8))
+         (result (rkt_js_result_t-result r)))
+    (rkt_webview_destroy_js_result r)
+    (list result value)))
+
+(define (rkt-webview-file-save wv title base-dir permitted-exts)
+  (let* ((r (rkt_webview_file_save (rkt-wv-win wv) title base-dir permitted-exts))
+         (value (cast (rkt_js_result_t-value r) _pointer _string*/utf-8))
+         (result (rkt_js_result_t-result r)))
+    (rkt_webview_destroy_js_result r)
+    (list result value)))
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Administration
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
diff --git a/private/racket-webview.rkt b/private/racket-webview.rkt
index 74fff5f..b138d25 100644
--- a/private/racket-webview.rkt
+++ b/private/racket-webview.rkt
@@ -16,6 +16,9 @@
          xml
          xml/xexpr
          json
+         (prefix-in g: gregor)
+         (prefix-in g: gregor/time)
+         gregor-utils
          )
 
 (provide webview-create
@@ -37,6 +40,18 @@
          webview-set-title!
 
          webview-choose-dir
+         webview-file-open
+         webview-file-save
+         wv-permitted-exts
+         
+         make-wv-permitted-exts
+         wv-permitted-exts-name
+         wv-permitted-exts-exts
+         set-wv-permitted-exts-exts!
+         set-wv-permitted-exts-name!
+         wv-permitted-exts?
+         wv-permitted-exts-exts?
+         wv-list-of-permitted-exts?
          
          webview-bind!
          
@@ -44,14 +59,16 @@
          webview-set-html!
 
          webview-set-innerHTML!
+         
          webview-set-value!
+         
          webview-value
          webview-value/bool
          webview-value/symbol
          webview-value/number
-         ;webview-value/date
-         ;webview-value/time
-         ;webview-value/datetime
+         webview-value/date
+         webview-value/time
+         webview-value/datetime
          
          webview-add-class!
          webview-remove-class!
@@ -60,12 +77,12 @@
 
          webview-set-attr!
          webview-attr
-         ;webview-attr/bool
-         ;webview-attr/symbol
-         ;webview-attr/number
-         ;webview-attr/date
-         ;webview-attr/time
-         ;webview-attr/datetime
+         webview-attr/bool
+         webview-attr/symbol
+         webview-attr/number
+         webview-attr/date
+         webview-attr/time
+         webview-attr/datetime
          
          ;webview-del-attr!
          
@@ -192,6 +209,63 @@
              (esc-quote selector)
              func))))
 
+(define (make-exts-filter list-of-pe)
+  (define (mef pe)
+    (format "~a ~a"
+            (wv-permitted-exts-name pe)
+            (map (λ (e) (format "*.~a" e)) (wv-permitted-exts-exts pe))))
+  (string-join (map mef (if (list? list-of-pe) list-of-pe (list list-of-pe))) ";;"))
+
+(define (filter->exts str)
+  (let ((re #px"^([^ ]+)\\s+[(]([^)]+)[)]"))
+    (let ((m (regexp-match re str)))
+      (cond ((eq? m #f)
+             #f)
+            (else (let* ((re1 #px"\\s+")
+                         (re2 #px"[*][.](.*)")
+                         (exts (regexp-split re1 (caddr m))))
+                    (make-wv-permitted-exts (cadr m)
+                                            (map (λ (e)
+                                                   (let ((m (regexp-match re2 e)))
+                                                     (string->symbol (cadr m))))
+                                                 exts))
+                    )
+                  )
+            )
+      )
+    )
+  )
+  
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Data structures
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define-struct wv-permitted-exts
+  ((name #:mutable) (exts #:mutable))
+  #:transparent
+  )
+
+(define (wv-permitted-exts-exts? e)
+  (list-of? symbol? e))
+
+(define (wv-permitted-exts-name? e)
+  (string? e))
+
+(define wv-pm-exts? wv-permitted-exts?)
+
+(set! wv-permitted-exts? (λ (e)
+                           (and (wv-pm-exts? e)
+                                (wv-permitted-exts-exts? (wv-permitted-exts-exts e))
+                                (wv-permitted-exts-name? (wv-permitted-exts-name e))
+                                )))
+
+(define (wv-list-of-permitted-exts? l)
+  (list-of? (λ (e) (and
+                    (wv-permitted-exts? e)
+                    (wv-permitted-exts-exts? (wv-permitted-exts-exts e))))
+            l))
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Webview functions
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -267,18 +341,45 @@
       (if (eq? res #f)
           #f
           (cond ((eq? (car res) 'oke)
-                 (let ((h (fromJson (cadr res))))
-                   (let ((r (make-hash)))
-                     (hash-set! r 'dir (hash-ref h 'dir))
-                     (hash-set! r 'state (string->symbol
-                                          (hash-ref h 'state)))
-                     r)))
+                 (let ((r (make-hash (hash->list (fromJson (cadr res))))))
+                   (hash-set! r 'state (string->symbol (hash-ref r 'state)))
+                   r))
                 (else #f))
           )
       )
     )
   )
 
+(define (file-open-save wv title base-dir permitted-exts open-save-f)
+  (let* ((bd (if (path? base-dir) (path->string base-dir) base-dir))
+         (ext-filter (make-exts-filter permitted-exts)))
+    (let ((res (open-save-f (wv-handle wv) title bd ext-filter)))
+      (if (eq? res #f)
+          #f
+          (cond ((eq? (car res) 'oke)
+                 (let* ((h (make-hash (hash->list (fromJson (cadr res))))))
+                   (hash-set! h 'state (string->symbol (hash-ref h 'state)))
+                   (hash-set! h 'used-filter (filter->exts (hash-ref h 'used-filter)))
+                   h))
+                (else #f))
+          )
+      )
+    )
+  )
+
+
+(define/contract (webview-file-open wv title base-dir permitted-exts)
+  (-> wv? string? (or/c path? string?) (or/c wv-permitted-exts? wv-list-of-permitted-exts?)
+      (or/c hash? boolean?))
+  (file-open-save wv title base-dir permitted-exts rkt-webview-file-open))
+
+(define/contract (webview-file-save wv title base-dir permitted-exts)
+  (-> wv? string? (or/c path? string?) (or/c wv-permitted-exts? wv-list-of-permitted-exts?)
+      (or/c hash? boolean?))
+  (file-open-save wv title base-dir permitted-exts rkt-webview-file-save))
+
+  
+
 (define/contract (webview-set-title! wv title)
   (-> wv? string? symbol?)
   (rkt-webview-set-title! (wv-handle wv) title))
@@ -351,7 +452,7 @@
   )
 
 (define/contract (webview-set-value! wv id val)
-  (-> wv? symbol? (or/c symbol? string? number? boolean?) symbol?)
+  (-> wv? symbol? (or/c symbol? string? number? boolean? g:date? g:time? g:datetime?) symbol?)
   (webview-run-js wv
                   (with-id id el
                     ((string-append
@@ -361,7 +462,17 @@
                       "  el.value = '~a';\n"
                       "}")
                      (if (eq? val #f) "false" "true")
-                     (esc-quote (format "~a" val))))
+                     (cond
+                       ([(g:date? val)]
+                        (date->string val))
+                       ([(g:time? val)]
+                        (time->string val))
+                       ([(g:datetime? val)]
+                        (datetime->string val))
+                       (else
+                        (esc-quote (format "~a" val))))
+                     )
+                    )
                   )
   )
 
@@ -381,28 +492,26 @@
         #f
         v)))
 
-(define/contract (webview-value/number wv id)
-  (-> wv? symbol? (or/c number? boolean?))
-  (let ((v (webview-value wv id)))
-    (if (eq? v #f)
-        #f
-        (string->number (webview-value wv id)))))
+(define-syntax wvv
+  (syntax-rules ()
+    ((_ name type-pred? convert)
+     (define/contract (name wv id)
+       (-> wv? symbol? (or/c type-pred? boolean?))
+       (let ((v (webview-value wv id)))
+         (if (eq? v #f)
+             #f
+             (convert v))))
+     )
+    )
+  )
 
-(define/contract (webview-value/symbol wv id)
-  (-> wv? symbol? (or/c symbol? boolean?))
-  (let ((v (webview-value wv id)))
-    (if (eq? v #f)
-        #f
-        (string->symbol (webview-value wv id)))))
+(wvv webview-value/time g:time? string->time)
+(wvv webview-value/date g:date? string->date)
+(wvv webview-value/datetime g:datetime? string->datetime)
+(wvv webview-value/number number? string->number)
+(wvv webview-value/symbol symbol? string->symbol)
+(wvv webview-value/bool boolean? (λ (e) (if (string=? e "true") #t #f)))
 
-(define/contract (webview-value/bool wv id)
-  (-> wv? symbol? (or/c symbol? boolean?))
-  (let ((v (webview-value wv id)))
-    (if (eq? v #f)
-        'fail
-        (if (string=? (webview-value wv id) "true")
-            #t
-            #f))))
 
 (define/contract (webview-add-class! wv id-or-selector class)
   (-> wv? (or/c symbol? string?) (or/c symbol? string? list?) hash?)
@@ -496,13 +605,22 @@
   )
 
 (define/contract (webview-set-attr! wv selector attr-entries)
-  (-> wv? (or/c symbol? string?) (or/c kv? list-of-kv?) hash?)
-  (let ((sel (if (symbol? selector)
-                 (format "#~a" selector)
-                 selector))
-        (cl (mk-js-array (if (kv? attr-entries)
-                             (list attr-entries)
-                             attr-entries)))
+  (-> wv? (or/c symbol? string?)
+      (or/c kv? list-of-kv?) hash?)
+  (let* ((sel (if (symbol? selector)
+                  (format "#~a" selector)
+                  selector))
+         (ae* (if (kv? attr-entries) (list attr-entries) attr-entries))
+         (ae** (map (λ (kv)
+                      (let ((v (kv-2 kv)))
+                        (make-kv (kv-1 kv)
+                                 (cond
+                                   ([g:date? v] (date->string v))
+                                   ([g:time? v] (time->string v))
+                                   ([g:datetime? v] (datetime->string v))
+                                   (else (format "~a" v))))
+                        )) ae*))
+          (cl (mk-js-array ae**))
         )
     (webview-call-js wv
                      (with-selector sel
@@ -531,39 +649,25 @@
     )
   )
 
-                       
-#|(define/contract (webview-set-style! wv selector style-entries)
-  (-> wv? (or/c symbol? string?) (or/c list? list-of-kv?) hash?)
-
-(define (webview-set-style!* wv selector h)
-  (list wv selector h))
-
-
-(define-syntax webview-style-entry
+(define-syntax wva
   (syntax-rules ()
-    ((_ h (k v))
-     (with-handlers ([exn:fail? (λ (e)
-                                  (hash-set! h 'k v))])
-       (hash-set! h k v)))
-    ((_ h q l)
-     (hash-set! h (car l) (cadr l)))
-    ((_ h l)
-     (hash-set! h (car l) (cadr l)))
-    )
-  )
-
-(define-syntax webview-set-style!
-  (syntax-rules ()
-    ((_ wv selector st ...)
-     (webview-set-style!* wv selector 
-                          (let ((h (make-hash)))
-                            (webview-style-entry h st)
-                            ...
-                            h))
+    ((_ name type-pred? convert)
+     (define/contract (name wv id attr)
+       (-> wv? symbol? (or/c symbol? string?) (or/c type-pred? boolean?))
+       (let ((v (webview-attr wv id attr)))
+         (if (eq? v #f)
+             #f
+             (convert v))))
      )
     )
   )
-|#
+
+(wva webview-attr/number number? string->number)
+(wva webview-attr/symbol symbol? string->symbol)
+(wva webview-attr/date g:date? string->date)
+(wva webview-attr/time g:time? string->time)
+(wva webview-attr/datetime g:datetime string->datetime)
+(wvv webview-attr/bool boolean? (λ (e) (if (string=? e "true") #t #f)))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; testing
diff --git a/private/utils.rkt b/private/utils.rkt
index af66f69..53257d0 100644
--- a/private/utils.rkt
+++ b/private/utils.rkt
@@ -2,7 +2,12 @@
 
 (require racket/string
          racket/port
+         racket/contract
          json
+         (prefix-in g: gregor)
+         (prefix-in g: gregor/time)
+         gregor-utils
+         racket-sprintf
          )
 
 (provide while
@@ -14,10 +19,19 @@
        fromJson
        mk-js-array
        js-code
+       kv-1
+       kv-2
+       make-kv
        kv?
        list-of-kv?
        list-of-symbol?
        list-of?
+       string->time
+       time->string
+       string->date
+       date->string
+       string->datetime
+       datetime->string
        )
 
 (define-syntax while
@@ -108,6 +122,22 @@
    (and (list? e) (= (length e) 2) (symbol? (car e)))
    (and (pair? e) (symbol? (car e)))))
 
+(define/contract (kv-1 e)
+  (-> kv? symbol?)
+  (car e))
+
+(define/contract (kv-2 e)
+  (-> kv? any/c)
+  (if (list? e)
+      (cadr e)
+      (cdr e)))
+
+(define/contract (make-kv k v)
+  (-> symbol? any/c kv?)
+  (if (list? v)
+      (list k v)
+      (cons k v)))
+
 (define (list-of? pred? l)
   (define (all-pred? l)
     (if (null? l)
@@ -124,4 +154,44 @@
 
 (define (list-of-symbol? l)
   (list-of? symbol? l))
-    
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Date / Time conversion
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define (string->time s)
+  (with-handlers ([exn:fail?
+                   (λ (e) (g:parse-time s "HH:mm"))])
+    (g:parse-time s "HH:mm:ss")))
+
+(define (time->string t)
+  (unless (or (g:time? t) (g:datetime? t) (g:moment? t))
+    (error "set! - gregor time?, moment? or datetime? expected"))
+  (sprintf "%02d:%02d:%02d" (g:->hours t) (g:->minutes t) (g:->seconds t)))
+
+(define (string->datetime s)
+  (with-handlers ([exn:fail?
+                   (λ (e) (g:parse-moment s "yyyy-MM-dd'T'HH:mm:ss"))])
+    (g:parse-moment s "yyyy-MM-dd'T'HH:mm")))
+
+(define (datetime->string dt)
+  (when (racket-date? dt)
+    (datetime->string date->moment dt))
+  (unless (or (g:datetime? dt) (g:moment? dt) (g:date? dt) (g:time? dt))
+    (error "set! - gregor time? , date?, datetime? or moment? expected"))
+  (sprintf "%04d:%02d:%02dT%02d:%02d:%02d"
+           (g:->year dt) (g:->month dt) (g:->day dt)
+           (g:->hours dt) (g:->minutes dt) (g:->seconds dt))
+  )
+
+(define (string->date d)
+  (g:parse-date d "yyyy-MM-dd"))
+
+(define (date->string d)
+  (when (racket-date? d)
+    (date->string (date->moment d)))
+  (unless (or (g:date? d) (g:moment? d) (g:datetime? d))
+    (error "set! - gregor date expected"))
+  (sprintf "%04d-%02d-%02d" (g:->year d) (g:->month d) (g:->day d)))
+
+                                            
diff --git a/rktwebview_qt/command.h b/rktwebview_qt/command.h
index 9b09cba..b9e2d2e 100644
--- a/rktwebview_qt/command.h
+++ b/rktwebview_qt/command.h
@@ -23,8 +23,8 @@
 #define COMMAND_WINDOW_STATUS    17
 #define COMMAND_SET_TITLE        18
 #define COMMAND_CHOOSE_DIR       19
-#define COMMAND_OPEN_FILE        20
-#define COMMAND_SAVE_FILE        21
+#define COMMAND_FILE_OPEN        20
+#define COMMAND_FILE_SAVE        21
 
 class Command
 {
diff --git a/rktwebview_qt/rktwebview.cpp b/rktwebview_qt/rktwebview.cpp
index aa2b1a4..6855242 100644
--- a/rktwebview_qt/rktwebview.cpp
+++ b/rktwebview_qt/rktwebview.cpp
@@ -190,3 +190,15 @@ rkt_js_result_t *rkt_webview_choose_dir(rktwebview_t w, const char *title, const
     rkt_webview_init();
     return handler->rktChooseDir(w, title, base_dir);
 }
+
+rkt_js_result_t *rkt_webview_file_open(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts)
+{
+    rkt_webview_init();
+    return handler->rktFileOpen(w, title, base_dir, permitted_exts);
+}
+
+rkt_js_result_t *rkt_webview_file_save(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts)
+{
+    rkt_webview_init();
+    return handler->rktFileSave(w, title, base_dir, permitted_exts);
+}
diff --git a/rktwebview_qt/rktwebview.h b/rktwebview_qt/rktwebview.h
index 457147c..b964dba 100644
--- a/rktwebview_qt/rktwebview.h
+++ b/rktwebview_qt/rktwebview.h
@@ -81,6 +81,8 @@ RKTWEBVIEW_QT_EXPORT result_t rkt_webview_minimize(rktwebview_t w);
 RKTWEBVIEW_QT_EXPORT window_state_t rkt_webview_window_state(rktwebview_t w);
 
 RKTWEBVIEW_QT_EXPORT rkt_js_result_t *rkt_webview_choose_dir(rktwebview_t w, const char *title, const char *base_dir);
+RKTWEBVIEW_QT_EXPORT rkt_js_result_t *rkt_webview_file_open(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts);
+RKTWEBVIEW_QT_EXPORT rkt_js_result_t *rkt_webview_file_save(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts);
 
 }
 
diff --git a/rktwebview_qt/rktwebview_qt.cpp b/rktwebview_qt/rktwebview_qt.cpp
index a0a973f..e9249fe 100644
--- a/rktwebview_qt/rktwebview_qt.cpp
+++ b/rktwebview_qt/rktwebview_qt.cpp
@@ -274,6 +274,41 @@ void Rktwebview_qt::processCommand(Command *cmd)
         cmd->done = true;
     }
     break;
+    case COMMAND_FILE_OPEN:
+    case COMMAND_FILE_SAVE: {
+        int wv = cmd->args[0].toInt();
+        QString title = cmd->args[1].toString();
+        QString base_dir = cmd->args[2].toString();
+        QString exts = cmd->args[3].toString();
+        if (_views.contains(wv)) {
+            WebviewWindow *w = _views[wv];
+            QString file;
+            QString selected_filter;
+            if (cmd->cmd == COMMAND_FILE_OPEN) {
+                file = QFileDialog::getOpenFileName(w, title, base_dir, exts, &selected_filter);
+            } else {
+                file = QFileDialog::getSaveFileName(w, title, base_dir, exts, &selected_filter);
+            }
+            if (file == "") {
+                QJsonObject obj;
+                obj["state"] = "canceled";
+                obj["file"] = "";
+                obj["used-filter"] = selected_filter;
+                cmd->result = QString::fromUtf8(QJsonDocument(obj).toJson(QJsonDocument::JsonFormat::Compact));
+            } else {
+                QJsonObject obj;
+                obj["state"] = "choosen";
+                obj["file"] = file;
+                obj["used-filter"] = selected_filter;
+                cmd->result = QString::fromUtf8(QJsonDocument(obj).toJson(QJsonDocument::JsonFormat::Compact));
+            }
+        } else {
+            cmd->js_result_ok = false;
+            cmd->result = false;
+        }
+        cmd->done = true;
+    }
+    break;
     default: {
         cmd->result = false;
         cmd->done = true;
@@ -484,6 +519,62 @@ rkt_js_result_t *Rktwebview_qt::rktChooseDir(rktwebview_t w, const char *title,
     return r;
 }
 
+rkt_js_result_t *Rktwebview_qt::rktFileOpen(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts)
+{
+    Command c(COMMAND_FILE_OPEN);
+    c.args.push_back(w);
+
+    QString t(title);
+    c.args.push_back(t);
+
+    QString dir(base_dir);
+    c.args.push_back(dir);
+
+    QString exts(permitted_exts);
+    c.args.push_back(exts);
+
+    postCommand(&c);
+
+    while(!c.done) { doEvents(); }
+
+    bool oke = c.js_result_ok;
+
+    rkt_js_result_t *r = static_cast<rkt_js_result_t *>(malloc(sizeof(rkt_js_result_t)));
+    r->result = c.js_result_ok ? result_t::oke : result_t::choose_dir_failed;
+
+    r->value = strdup(c.result.toString().toUtf8());
+
+    return r;
+}
+
+rkt_js_result_t *Rktwebview_qt::rktFileSave(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts)
+{
+    Command c(COMMAND_FILE_SAVE);
+    c.args.push_back(w);
+
+    QString t(title);
+    c.args.push_back(t);
+
+    QString dir(base_dir);
+    c.args.push_back(dir);
+
+    QString exts(permitted_exts);
+    c.args.push_back(exts);
+
+    postCommand(&c);
+
+    while(!c.done) { doEvents(); }
+
+    bool oke = c.js_result_ok;
+
+    rkt_js_result_t *r = static_cast<rkt_js_result_t *>(malloc(sizeof(rkt_js_result_t)));
+    r->result = c.js_result_ok ? result_t::oke : result_t::choose_dir_failed;
+
+    r->value = strdup(c.result.toString().toUtf8());
+
+    return r;
+}
+
 result_t Rktwebview_qt::rktWindowSetTitle(rktwebview_t wv, const char *title)
 {
     Command c(COMMAND_SET_TITLE);
diff --git a/rktwebview_qt/rktwebview_qt.h b/rktwebview_qt/rktwebview_qt.h
index 0f7c4b0..295a89c 100644
--- a/rktwebview_qt/rktwebview_qt.h
+++ b/rktwebview_qt/rktwebview_qt.h
@@ -85,6 +85,8 @@ public:
     window_state_t rktWindowState(rktwebview_t w);
 
     rkt_js_result_t *rktChooseDir(rktwebview_t w, const char *title, const char *base_dir);
+    rkt_js_result_t * rktFileOpen(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts);
+    rkt_js_result_t * rktFileSave(rktwebview_t w, const char *title, const char *base_dir, const char *permitted_exts);
 
     result_t rktWindowSetTitle(rktwebview_t wv, const char *title);