diff --git a/README.md b/README.md
new file mode 100644
index 0000000..acd576d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# Kriptopter
+
+mini web app to use WebCrypto
+
+[bookmarklet]("javascript:win=window.open('','','titlebar=no,location=no'); fetch('https://git.p2p.legal/dig/kriptopter/raw/master/kriptopter').then(res=>res.text()).then(app=>win.document.write(app)  )")
\ No newline at end of file
diff --git a/kriptopter b/kriptopter
index fbdfb3a..f51adcb 100644
--- a/kriptopter
+++ b/kriptopter
@@ -1,44 +1,322 @@
 <style>
-body{
-    display: grid;
-    grid-template: "pass pass" 1.5em 
-                   "main main" auto 
-                   "left right" 2em 
-                   / auto;
-    height: 100%;
-    grid-gap: 1em;
-    margin: 0;
-    background: lightgrey;
-    box-sizing: border-box;
-    padding: 1em;
-}
-input { grid-area: pass }
-textarea { grid-area: main }
-button:first { grid-area: left }
-button:last { grid-area: right }
+    body{
+        display: grid;
+        grid-template: "menu menu menu" 2em 
+                    "main main main" auto 
+                    "left middle right" 2em 
+                    / 6em auto 6em;
+        height: 100%;
+        grid-gap: 1em;
+        margin: 0;
+        background: lightgrey;
+        box-sizing: border-box;
+        padding: 1em;
+    }
+
+    menu { grid-area: menu }
+    input[type=file] { display: none; }
+
+    ui-data {
+        grid-area: main;
+        margin-top: -1.05em;
+        height: calc(100% + 1.05em);
+    }
+
+    button[encrypt] { grid-area: left }
+    pass { grid-area: middle }
+    button[decrypt] { grid-area: right }
+    
+    button[encrypt],
+    button[decrypt] {
+        font-weight: bolder;
+        text-transform: uppercase;
+    }
+    menu {
+        display: flex;
+        height: 2em;
+        margin: 0;
+        padding: 0;
+    }
+
+    menu > button {
+        font-size: 1em;
+        height: 2em;
+        width: 2em;
+        margin-left: -1px;
+    }
+
+    input[filename] { flex: 1; padding: 0 .5em; }
+
+    pass {
+        position: relative;
+        height: 2em;
+        border: 1px solid darkgrey;
+        overflow: hidden;
+    }
+    pass input { filter: blur(5px); width: 100%; border: none;
+        height: 100%;
+        padding: 0 .5em; }
+    pass i { position: absolute; top: .5em; right: .5em;}
+    pass input.clear { filter: blur(0) }
+
+    ui-toast {
+        position: fixed;
+        text-align: center;
+        background: lightblue;
+        top: 50%;
+        left: 50%;
+        width: 20em;
+        margin: -1em -10em;
+        height: 2em;
+    }
 </style>
-<input type="text" placeholder="Enter a password"/>
-<textarea></textarea>
-<button onclick="encrypt()">encrypt</button><button onclick="decrypt()">decrypt</button>
-<script>
-const $ = s=> document.querySelector(s)
-,     algo = { name: "AES-GCM", iv: Uint8Array.from([120,1,248,135,62,71,87,156,92,67,155,37]) }
-,     $pass = $('input')
-,     $text = $('textarea')
+<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/solid.css" integrity="sha384-TbilV5Lbhlwdyc4RuIV/JhD8NR+BfMrvz4BL5QFa2we1hQu6wvREr3v6XSRfCTRp" crossorigin="anonymous">
+<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/regular.css" integrity="sha384-avJt9MoJH2rB4PKRsJRHZv7yiFZn8LrnXuzvmZoD3fh1aL6aM6s0BBcnCvBe6XSD" crossorigin="anonymous">
+<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/fontawesome.css" integrity="sha384-ozJwkrqb90Oa3ZNb+yKFW2lToAWYdTiF1vt8JiH5ptTGHTGcN7qdoR1F95e0kYyG" crossorigin="anonymous">
+
+
+<menu>
+    <button disabled select title="Select text on the page"
+            onclick="">
+        <i class="fas fa-align-center"></i>
+    </button>
+    <button disabled point title="Point the element in the page"
+            onclick="">
+        <i class="fas fa-mouse-pointer"></i>
+    </button>
+    <button page title="Load the whole page content"
+            onclick="$text.value = opener.document.body.textContent">
+        <i class="far fa-file"></i>
+    </button>
+    <button open title="Load a file from disk"
+            onclick="$`[type=file]`.click()">
+        <i class="far fa-folder-open"></i>
+        <input type="file" onchange="read(this.files[0]).then( s=> $text.value = s ); $filename.value = this.files[0].name"/>
+    </button>
+    <input filename type="text"/>
+    <button save title="Save to disk"
+            onclick="save($text.value,'cryptor.txt').catch(bubbleOn(this))">
+        <i class="far fa-save"></i>
+    </button>
+</menu>
+<ui-data></ui-data>
+
+<button encrypt onclick="encrypt2($text.value).then(res=>$text.value=res,bubbleOn(this))">encrypt</button>
+<pass>
+    <input type="text" placeholder="Enter a password"/>
+    <i class="far fa-eye-slash" onmouseover="$pass.classList.add('clear');this.classList.remove('fa-eye-slash');this.classList.add('fa-eye')" 
+                                onmouseout="$pass.classList.remove('clear');this.classList.add('fa-eye-slash');this.classList.remove('fa-eye')"></i>
+</pass>
+<button decrypt onclick="decrypt($text.value).catch(bubbleOn(this))">decrypt</button>
+
+<template ui-data>
+    <style>
+        textarea {
+            width: 100%;
+            height: 100%;
+            resize: none;
+            padding-bottom: 2em;
+        }
+        button {
+            position: relative;
+            top: -1.6em;
+            margin-right: -1px;
+        }
+        
+        :host-context([bin]) [bin] { color: rebeccapurple }
+        :host-context([uint]) [uint] { color: rebeccapurple }
+        :host-context([utf8]) [utf8] { color: rebeccapurple }
+        :host-context([base64]) [base64] { color: rebeccapurple }
+        :host-context([frame]) [frame] { color: rebeccapurple }
+    </style>
+    <textarea></textarea>
+</template>
+
+<script ui>
+const _s = (ss, ...pp)=> ss.map((s,i)=> s + (pp[i]||'')).join('')
+,     _a = iterable=> iterable.length > 1 ? iterable : iterable[0]
+,     Q = (ss, ...pp)=> Array.from( document.querySelectorAll( _s(ss, ...pp)) )
+,     T = document.createElement('template')
+,     DOM = (ss, ...pp)=> ( T.innerHTML = _s(ss, ...pp), document.adoptNode(T.content).childNodes )
+,     $ = (ss, ...pp)=> _a( ~_s(ss, ...pp).indexOf('<') ? DOM(ss, ...pp) : Q(ss, ...pp) )
+
+,     notify = (html,duration)=> $`body`.add( $`<ui-toast ${duration?`duration="${duration}"`:''}>${html}</ui-toast>` )
+,     bubbleOn = el=> e=> el.dispatchEvent( new ErrorEvent('Error',{bubbles:true, error:e}) )
+,     parseAlgo = str=> ({ name: str.split(' ')[0], iv: Uint8Array.from(str.split(' ').slice(1)) })
+,     pulse = color=> (document.body.style.background = color) && setTimeout(o=> document.body.style.background = 'lightgrey', 1000)
+
+Node.prototype.add = function( ...els )
+{
+    this.append( ...els )
+    return _a( els )
+}
+Node.prototype.$ = function(ss, ...pp)
+{
+    return _a(
+        ~_s(ss, ...pp).indexOf('<')
+            ? this.add(...DOM(ss, ...pp))
+            : Array.from( this.querySelectorAll( _s(ss, ...pp)) )
+    )
+}
+
+class UI extends HTMLElement {
+    static get is(){ return 'ui' + this.name.replace(/[A-Z]/g, L=> '-'+L.toLocaleLowerCase()) }
+    constructor()
+    {
+        super()
+        let tpl = $`template[${this.constructor.is}]`
+        tpl && this.attachShadow({mode: 'open'})
+            .appendChild( tpl.content.cloneNode(true) )
+    }
+}
+
+class Toast extends UI {
+    static get duration(){ return this._duration || 5000000 }
+    static set duration( v ){ this._duration = v }
+    connectedCallback()
+    {
+        setTimeout( toast=> toast.remove(), this.getAttribute('duration') || Toast.duration, this )
+    }
+}
+
+
+class Data extends UI {
+    static get observedAttributes(){ return ['bin','uint','utf8','base64','frame'] }
+    connectedCallback()
+    {
+        // this.observer = new MutationObserver(
+            // changes=> console.log(changes.filter(m=>~['bin','255','utf8','base64','object'].indexOf(m.attributeName)) )
+        // )
+        // .observe( this, { attributes: true } )
+        this.shadowRoot.append( ...Data.observedAttributes.map( type=> $`<button ${type}>${type}</button>` ) )
+        this.shadowRoot.$`button`.map( button=> button.onclick = e=> {
+            [...this.attributes].map( o=> o.ownerElement.removeAttributeNode(o) )
+            this.setAttribute( e.target.innerText, '' )
+        })
+    }
+    get value(){ return this.shadowRoot.$`textarea`.value }
+    set value( v ){ return this.shadowRoot.$`textarea`.value = v }
+    attributeChangedCallback(name, oldValue, newValue)
+    {
+        console.log( arguments )
+    }
+}
+
+
+;[ Toast, Data ]
+    .map( klass=> customElements.define(klass.is, klass) )
+
+document.body.addEventListener('Error', e=> pulse('red') && (notify(e.error.message).style.color = 'red') )
+
+</script>
+
+<script app>
+const algo = { name: "AES-GCM", iv: Uint8Array.from([120,1,248,135,62,71,87,156,92,67,155,37]) }
+,     algos = [ "AES-GCM 120 1 248 135 62 71 87 156 92 67 155 37" ]
+//,     algo = parseAlgo(algos[0])
+,     $pass = $`pass input`
+,     $text = $`ui-data`
+,     $filename = $`[filename]`
+
+let key
+$pass.onchange = async e=>
+    key = await crypto.subtle.importKey(
+        'raw'
+    ,   await crypto.subtle.digest( 'SHA-256', new TextEncoder().encode($pass.value) )
+    ,   algo, false, ['encrypt','decrypt']
+    )
 
 const encrypt = ()=> {
-    crypto.subtle.digest( 'SHA-256', new TextEncoder().encode($pass.value) )
+    return crypto.subtle.digest( 'SHA-256', new TextEncoder().encode($pass.value) )
         .then( pwHash=> crypto.subtle.importKey('raw', pwHash, algo, false, ['encrypt']) )
         .then( key=> crypto.subtle.encrypt(algo, key, new TextEncoder().encode($text.value)) )
-        .then( ctBuffer=> $text.value = new Uint8Array(ctBuffer).toString().replace(/,/g,'O') )
-        .catch( e=> (document.body.style.background = 'red') && setTimeout(o=> document.body.style.background = 'lightgrey', 1000) )
+        //.then( ctBuffer=> $text.value = new Uint8Array(ctBuffer).toString().replace(/,/g,'O') )
+        .then( ctBuffer=> $text.value = uint2String( new Uint8Array(ctBuffer) ) )
+        //.then( ctBuffer=> $text.value = new TextDecoder().decode(new Uint8Array(ctBuffer)) )
+        
+        //.catch( e=> pulse('red') )
 }
+const encrypt2 = str=> 
+    crypto.subtle.encrypt( algo, key, new TextEncoder().encode(str) )
+        //.then( ctBuffer=> $text.value = new Uint8Array(ctBuffer).toString().replace(/,/g,'O') )
+        .then( ctBuffer=> uint2String(new Uint8Array(ctBuffer)) )
+        //.then( ctBuffer=> $text.value = new TextDecoder().decode(new Uint8Array(ctBuffer)) )
+        
+        //.catch( e=> pulse('red') )
+
 
 const decrypt = ()=> {
-    crypto.subtle.digest( 'SHA-256', new TextEncoder().encode($pass.value) )
+    return crypto.subtle.digest( 'SHA-256', new TextEncoder().encode($pass.value) )
         .then( pwHash=> crypto.subtle.importKey('raw', pwHash, algo, false, ['decrypt']) )
-        .then( key=> crypto.subtle.decrypt(algo, key, Uint8Array.from($text.value.split('O').map(Number)).buffer ) 	)
+        //.then( key=> crypto.subtle.decrypt(algo, key, Uint8Array.from($text.value.split('O').map(Number)).buffer ) 	)
+        .then( key=> crypto.subtle.decrypt(algo, key, string2Uint($text.value).buffer ) 	)
+        //.then( key=> crypto.subtle.decrypt(algo, key, new TextEncoder().encode($text.value).buffer ) 	)
         .then( ptBuffer=> $text.value = new TextDecoder().decode(ptBuffer) )
-        .catch( e=> (document.body.style.background = 'red') && setTimeout(o=> document.body.style.background = 'lightgrey', 1000) )
+        
+        //.catch( e=> pulse('red') )
 }
+
+var lastSaved
+const save = ( content, filename )=> {
+    let link = document.createElement('a')
+    link.setAttribute( 'download', filename )
+    // If we are replacing a previously generated file we need to
+    // manually revoke the object URL to avoid memory leaks.
+    lastSaved && URL.revokeObjectURL( lastSaved )
+    link.href = lastSaved = URL.createObjectURL( new Blob([content], {type: 'text/plain'}) )
+    //link.href = makeTextFile( content )
+    document.body.appendChild( link )
+
+    // wait for the link to be added to the document
+    window.requestAnimationFrame( e=> {
+        link.dispatchEvent( new MouseEvent('click') )
+        document.body.removeChild( link )
+    })
+}
+
+const read = file=> new Promise( (ok,ko)=> {
+    let r = new FileReader()
+    r.onload = e=> ok( r.result )
+    r.onerror = e=> ko()
+    r.readAsText( file )
+})
+
+
+var textFile
+const makeTextFile = text=> {
+    
+    textFile && URL.revokeObjectURL(textFile)
+    textFile = URL.createObjectURL( new Blob([text], {type: 'text/plain'}) )
+
+    // returns a URL you can use as a href
+    return textFile
+}
+
+
+const save2 = (file, content, type)=> window.open( "data:application/octet-stream," + encodeURIComponent(content), file )
+
+const uint2String = uintArray=> String.fromCharCode.apply( null, uintArray )
+
+const string2Uint = string=> new Uint8Array(
+    string.split('')
+        .map( l=>l.charCodeAt(0) )
+)
+
+
+/*const uintToString = (uintArray)=> {
+    var encodedString = String.fromCharCode.apply(null, uintArray),
+        decodedString = decodeURIComponent(escape(encodedString));
+    return decodedString;
+}
+function stringToUint(string) {
+    var string = btoa(unescape(encodeURIComponent(string))),
+        charList = string.split(''),
+        uintArray = [];
+    for (var i = 0; i < charList.length; i++) {
+        uintArray.push(charList[i].charCodeAt(0));
+    }
+    return new Uint8Array(uintArray);
+}
+
+*/
 </script>
\ No newline at end of file