diff --git a/cmd/passgo-gui/main.go b/cmd/passgo-gui/main.go
index bfb43b0..6e8574a 100644
--- a/cmd/passgo-gui/main.go
+++ b/cmd/passgo-gui/main.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -23,6 +24,7 @@ import (
 	"gopkg.in/yaml.v2"
 
 	"git.wow.st/gmp/passgo"
+	"git.wow.st/gmp/rand"
 )
 
 type conf struct {
@@ -470,24 +472,92 @@ func eventLoop() {
 	}
 
 	var insName, insValue string
+	genBtn := &SelButton{SelColor: darkgray}
+	genBtn.Button = Button{Face: face, Label: "generate", Background: gray}
+	symBtn := &SelButton{SelColor: gray, Selected: true}
+	numBtn := &SelButton{SelColor: gray, Selected: true}
+	symBtn.Button = Button{Face: face, Label: "@", Background: darkgray}
+	numBtn.Button = Button{Face: face, Label: "#", Background: darkgray}
+	lenEd := &text.Editor{Face: face, SingleLine: true, Alignment: text.End}
+	lenEd.SetText("15")
+	lBtn := &Button{Face: face, Label: "<", Background: gray}
+	rBtn := &Button{Face: face, Label: ">", Background: gray}
+
+	updatePw := func() {
+		if !genBtn.Selected {
+			passvalEd.SetText("")
+			return
+		}
+		var gen rand.Generator
+		switch {
+		case symBtn.Selected && numBtn.Selected:
+			gen = rand.Char
+		case symBtn.Selected:
+			gen = rand.LettersSymbols
+		case numBtn.Selected:
+			gen = rand.LetterDigits
+		default:
+			gen = rand.Letter
+		}
+		l,_ := strconv.Atoi(lenEd.Text())
+		pw,_ := rand.Slice(gen,l)
+		passvalEd.SetText(string(pw))
+	}
 
 	insertPage = func() {
-		cs = flex.Rigid()
-		c2 := flex.End(insertLabel.Layout(ops, cs))
+		c2 := flex.End(insertLabel.Layout(ops, flex.Rigid()))
 
 		c3 := flex.End(passnameLabel.Layout(ops, flex.Rigid()))
 		c4 := flex.End(passnameEd.Layout(c, q, ops, flex.Rigid()))
 		c5 := flex.End(passvalLabel.Layout(ops, flex.Rigid()))
 		c6 := flex.End(passvalEd.Layout(c, q, ops, flex.Rigid()))
-		cs = flex.Rigid()
+
 		al := &layout.Align{Alignment: layout.E}
 		btnflx := &layout.Flex{Axis: layout.Horizontal}
-		btnflx.Init(ops, al.Begin(ops, cs))
-		bc1 := btnflx.End(backBtn.Layout(c, q, ops, btnflx.Rigid()))
-		bc2 := btnflx.End(saveBtn.Layout(c, q, ops, btnflx.Rigid()))
-		c7 := flex.End(al.End(btnflx.Layout(bc1, bc2)))
-		flex.Layout(c1, c2, c3, c4, c5, c6, c7)
+		btnflx.Init(ops, al.Begin(ops, flex.Rigid()))
+		bc1 := btnflx.End(lBtn.Layout(c, q, ops, btnflx.Rigid()))
+		cs := btnflx.Rigid()
+		cs.Width.Min = 60
+		bc2 := btnflx.End(lenEd.Layout(c, q, ops, cs))
+		bc3 := btnflx.End(rBtn.Layout(c, q, ops, btnflx.Rigid()))
+		bc4 := btnflx.End(symBtn.Layout(c, q, ops, btnflx.Rigid()))
+		bc5 := btnflx.End(numBtn.Layout(c, q, ops, btnflx.Rigid()))
+		bc6 := btnflx.End(genBtn.Layout(c, q, ops, btnflx.Rigid()))
+		c7 := flex.End(al.End(btnflx.Layout(bc1, bc2, bc3, bc4, bc5, bc6)))
 
+		btnflx.Init(ops, al.Begin(ops, flex.Rigid()))
+		bc1 = btnflx.End(backBtn.Layout(c, q, ops, btnflx.Rigid()))
+		bc2 = btnflx.End(saveBtn.Layout(c, q, ops, btnflx.Rigid()))
+		c8 := flex.End(al.End(btnflx.Layout(bc1, bc2)))
+		flex.Layout(c1, c2, c3, c4, c5, c6, c7, c8)
+
+		if lBtn.Clicked() {
+			l,_ := strconv.Atoi(lenEd.Text())
+			if l > 0 {
+				l -= 1
+			}
+			lenEd.SetText(strconv.Itoa(l))
+			updatePw()
+			w.Invalidate()
+		}
+		if rBtn.Clicked() {
+			l,_ := strconv.Atoi(lenEd.Text())
+			lenEd.SetText(strconv.Itoa(l+1))
+			updatePw()
+			w.Invalidate()
+		}
+		if genBtn.Clicked() {
+			updatePw()
+			w.Invalidate()
+		}
+		if symBtn.Clicked() {
+			updatePw()
+			w.Invalidate()
+		}
+		if numBtn.Clicked() {
+			updatePw()
+			w.Invalidate()
+		}
 		if backBtn.Clicked() {
 			w.Invalidate()
 			page = listPage
diff --git a/cmd/passgo-gui/ui.go b/cmd/passgo-gui/ui.go
index 50a66f5..a50ca08 100644
--- a/cmd/passgo-gui/ui.go
+++ b/cmd/passgo-gui/ui.go
@@ -56,6 +56,12 @@ func (b *Overlay) Layout(c ui.Config, ops *ui.Ops, cs layout.Constraints) layout
 	return ins.End(dims)
 }
 
+type SelButton struct {
+	Button
+	SelColor color.RGBA
+	Selected bool
+}
+
 type Button struct {
 	Face       text.Face
 	Label      string
@@ -127,3 +133,14 @@ func (b *Button) Layout(c ui.Config, q input.Queue, ops *ui.Ops, cs layout.Const
 func (b *Button) Clicked() bool {
 	return b.clicked
 }
+
+func (b *SelButton) Clicked() bool {
+	if b.clicked {
+		b.Selected = !b.Selected
+		b.SelColor, b.Background = b.Background, b.SelColor
+		return true
+	} else {
+		return false
+	}
+}
+
diff --git a/go.mod b/go.mod
index 576526c..ff7fe86 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.12
 require (
 	gioui.org/ui v0.0.0-20190918172808-816f0e901fc6
 	git.wow.st/gmp/clip v0.0.0-20191001134149-1458ba6a7cf5
+	git.wow.st/gmp/rand v0.0.0-20191001220155-a81bebfaf8b0
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/jcmdev0/gpgagent v0.0.0-20180509014935-5601b32d936c
 	golang.org/x/crypto v0.0.0-20190911031432-227b76d455e7
diff --git a/go.sum b/go.sum
index 86dd242..fe1b3f2 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,10 @@ gioui.org/ui v0.0.0-20190918172808-816f0e901fc6 h1:LvHEYxyOW7g+PhOiAm8Delc3AUv9E
 gioui.org/ui v0.0.0-20190918172808-816f0e901fc6/go.mod h1:PssKPKlqVIeyaed+0w492Xc2NgX5M3n6oZKOAj5rxoE=
 git.wow.st/gmp/clip v0.0.0-20191001134149-1458ba6a7cf5 h1:OKeTjZST+/TKvtdA258NXJH+/gIx/xwyZxKrAezNFvk=
 git.wow.st/gmp/clip v0.0.0-20191001134149-1458ba6a7cf5/go.mod h1:NLdpaBoMQNFqncwP8OVRNWUDw1Kt9XWm3snfT7cXu24=
+git.wow.st/gmp/rand v0.0.0-20191001220006-66bfa936ad6b h1:yu3SnygEUgkNJ3xBXLkWHws7tki5qveZ6Kk7ybWj1GQ=
+git.wow.st/gmp/rand v0.0.0-20191001220006-66bfa936ad6b/go.mod h1:8+2Gwnrpc5yuk8Wp6cBhxvGcNLumYiPbQ7n0SQ8h29A=
+git.wow.st/gmp/rand v0.0.0-20191001220155-a81bebfaf8b0 h1:08wP00wvbDINsct1fzKV1xGGLvvtNsSb2X4CtIdpBzM=
+git.wow.st/gmp/rand v0.0.0-20191001220155-a81bebfaf8b0/go.mod h1:8+2Gwnrpc5yuk8Wp6cBhxvGcNLumYiPbQ7n0SQ8h29A=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/jcmdev0/gpgagent v0.0.0-20180509014935-5601b32d936c h1:DCnjNrPDSEslcqqBgcZBxlLUIhk2elQVyf2V+HkyxJI=