diff --git a/README.adoc b/README.adoc
index 9b1dac6..c8548f7 100644
--- a/README.adoc
+++ b/README.adoc
@@ -31,3 +31,11 @@ Add `mm.iban` as a dependency of your AngularJS module.
 ----
 
 To use this directive the `ngModel` directive must also be used because this directive depends on it.
+
+=== filter
+[source,html]
+----
+IBAN: {{ string | iban:separator }}
+----
+
+The filter converts a given IBAN to it's human-friendly represantation. The separator defaults to a single space.
diff --git a/src/ng-iban.coffee b/src/ng-iban.coffee
index 9fb18bc..4e0975e 100644
--- a/src/ng-iban.coffee
+++ b/src/ng-iban.coffee
@@ -43,3 +43,18 @@ angular
           else modelValue
 
       return
+
+  .filter 'iban', ->
+    (string, separator) ->
+      parseIban = (value) ->
+        if value? then value.toUpperCase().replace /\s/g, '' else undefined
+
+      isValidIban = (value) ->
+        iban = parseIban(value)
+        IBAN.isValid iban
+
+      valid = isValidIban string
+      if valid
+        IBAN.printFormat string, separator
+      else
+        string
diff --git a/test/spec/ng-iban.coffee b/test/spec/ng-iban-directive.coffee
similarity index 100%
rename from test/spec/ng-iban.coffee
rename to test/spec/ng-iban-directive.coffee
diff --git a/test/spec/ng-iban-filter.coffee b/test/spec/ng-iban-filter.coffee
new file mode 100644
index 0000000..fe22f20
--- /dev/null
+++ b/test/spec/ng-iban-filter.coffee
@@ -0,0 +1,22 @@
+'use strict'
+
+describe 'Filter: iban', ->
+
+  # load the filter's module
+  beforeEach module 'mm.iban'
+
+  filter = undefined
+
+  beforeEach inject ($filter) ->
+    filter = $filter 'iban'
+
+  it 'electronic IBAN should become print IBAN', ->
+    expect(filter('NL91ABNA0417164300')).toEqual 'NL91 ABNA 0417 1643 00'
+
+  it 'invalid IBAN should stay untouched', ->
+    expect(filter('INVALIDIBAN')).toEqual 'INVALIDIBAN'
+    expect(filter('NL90ABNA0417164300')).toEqual 'NL90ABNA0417164300'
+
+  it 'mind custom separator', ->
+    expect(filter('NL91ABNA0417164300', '-')).toEqual 'NL91-ABNA-0417-1643-00'
+    expect(filter('NL91ABNA0417164300', '')).toEqual 'NL91ABNA0417164300'