diff --git a/go.mod b/go.mod
index ff8f7f37..60d49091 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.19
 require (
 	code.rocketnine.space/tslocum/cbind v0.1.5
 	github.com/atotto/clipboard v0.1.4
-	github.com/creack/pty v1.1.21
+	github.com/creack/pty v1.1.23
 	github.com/fsnotify/fsnotify v1.7.0
 	github.com/gdamore/tcell/v2 v2.7.4
 	github.com/hashicorp/golang-lru/v2 v2.0.7
diff --git a/go.sum b/go.sum
index 212e9835..5c1a605b 100644
--- a/go.sum
+++ b/go.sum
@@ -3,8 +3,8 @@ code.rocketnine.space/tslocum/cbind v0.1.5/go.mod h1:LtfqJTzM7qhg88nAvNhx+VnTjZ0
 github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
 github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/creack/pty v1.1.21 h1:1/QdRyBaHHJP61QkWMXlOIBfsgdDeeKfK8SYVUWJKf0=
-github.com/creack/pty v1.1.21/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
+github.com/creack/pty v1.1.23 h1:4M6+isWdcStXEf15G/RbrMPOQj1dZ7HPZCGwE4kOeP0=
+github.com/creack/pty v1.1.23/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
diff --git a/oviewer/content.go b/oviewer/content.go
index fde486dc..0120ea48 100644
--- a/oviewer/content.go
+++ b/oviewer/content.go
@@ -28,6 +28,14 @@ var DefaultContent = content{
 	style: tcell.StyleDefault,
 }
 
+// SpaceContent is a space character.
+var SpaceContent = content{
+	mainc: ' ',
+	combc: nil,
+	width: 1,
+	style: tcell.StyleDefault,
+}
+
 // EOFC is the EOF character.
 const EOFC rune = '~'
 
@@ -96,6 +104,9 @@ func parseString(conv Converter, str string, tabWidth int) contents {
 		}
 		st.parseChar(st.mainc, st.combc)
 	}
+	st.mainc = '\n'
+	st.combc = nil
+	conv.convert(st)
 	return st.lc
 }
 
diff --git a/oviewer/convert_align.go b/oviewer/convert_align.go
new file mode 100644
index 00000000..305cd4a1
--- /dev/null
+++ b/oviewer/convert_align.go
@@ -0,0 +1,108 @@
+package oviewer
+
+import (
+	"regexp"
+
+	"github.com/mattn/go-runewidth"
+)
+
+// align is a converter that aligns columns.
+// It is used to align columns when the delimiter is reached or to align columns by adding spaces to the end of the line.
+type align struct {
+	es           *escapeSequence
+	maxWidths    []int // column max width
+	orgWidths    []int
+	WidthF       bool
+	delimiter    string
+	delimiterReg *regexp.Regexp
+	count        int
+}
+
+func newAlignConverter(widthF bool) *align {
+	return &align{
+		es:     newESConverter(),
+		count:  0,
+		WidthF: widthF,
+	}
+}
+
+// convert converts only escape sequence codes to display characters and returns them as is.
+// Returns true if it is an escape sequence and a non-printing character.
+func (a *align) convert(st *parseState) bool {
+	if len(st.lc) == 0 {
+		a.reset()
+	}
+	if a.es.convert(st) {
+		return true
+	}
+
+	if len(a.maxWidths) == 0 {
+		return false
+	}
+	a.count += 1
+	if runewidth.RuneWidth(st.mainc) > 1 {
+		a.count += 1
+	}
+
+	if st.mainc != '\n' {
+		return false
+	}
+
+	if a.WidthF {
+		return a.convertWidth(st)
+	}
+	return a.convertDelm(st)
+}
+
+func (a *align) reset() {
+	a.count = 0
+}
+
+// convertDelm aligns the column widths by adding spaces when it reaches a delimiter.
+// convertDelm works line by line.
+func (a *align) convertDelm(st *parseState) bool {
+	str, pos := ContentsToStr(st.lc)
+	indexes := allIndex(str, a.delimiter, a.delimiterReg)
+	if len(indexes) == 0 {
+		return false
+	}
+	s := 0
+	lc := make(contents, 0, len(st.lc))
+	for c := 0; c < len(indexes); c++ {
+		e := pos.x(indexes[c][0])
+		lc = append(lc, st.lc[s:e]...)
+		width := e - s
+		// Add space to align columns.
+		for ; width < a.maxWidths[c]; width++ {
+			lc = append(lc, SpaceContent)
+		}
+		s = e
+	}
+	lc = append(lc, st.lc[s:]...)
+	st.lc = lc
+	return false
+}
+
+// convertWidth accumulates one line and then adds spaces to align the column widths.
+// convertWidth works line by line.
+func (a *align) convertWidth(st *parseState) bool {
+	s := 0
+	lc := make(contents, 0, len(st.lc))
+	for i := 0; i < len(a.orgWidths); i++ {
+		e := findColumnEnd(st.lc, a.orgWidths, i) + 1
+		e = min(e, len(st.lc))
+		width := e - s
+		if s >= e {
+			break
+		}
+		lc = append(lc, st.lc[s:e]...)
+		// Add space to align columns.
+		for ; width <= a.maxWidths[i]; width++ {
+			lc = append(lc, SpaceContent)
+		}
+		s = e
+	}
+	lc = append(lc, st.lc[s:]...)
+	st.lc = lc
+	return false
+}
diff --git a/oviewer/convert_es.go b/oviewer/convert_es.go
index a01e7db5..d0481eab 100644
--- a/oviewer/convert_es.go
+++ b/oviewer/convert_es.go
@@ -149,7 +149,7 @@ func (es *escapeSequence) convert(st *parseState) bool {
 		es.state = ansiEscape
 		return true
 	case '\n':
-		return true
+		return false
 	}
 	return false
 }
diff --git a/oviewer/document.go b/oviewer/document.go
index 4dfa8474..aac224fb 100644
--- a/oviewer/document.go
+++ b/oviewer/document.go
@@ -55,6 +55,8 @@ type Document struct {
 
 	// conv is an interface that converts escape sequences, etc.
 	conv Converter
+	// alignConv is an interface that converts alignment.
+	alignConv *align
 
 	// fileName is the file name to display.
 	FileName string
@@ -222,6 +224,7 @@ func NewDocument() (*Document, error) {
 	if err := m.NewCache(); err != nil {
 		return nil, err
 	}
+	m.alignConv = newAlignConverter(m.ColumnWidth)
 	m.conv = m.converterType(m.general.Converter)
 	return m, nil
 }
@@ -244,6 +247,8 @@ func (m *Document) converterType(name string) Converter {
 		return newRawConverter()
 	case "es":
 		return newESConverter()
+	case "align":
+		return m.alignConv
 	}
 	return defaultConverter
 }
diff --git a/oviewer/move_vertical.go b/oviewer/move_vertical.go
index 6afee098..f871bc06 100644
--- a/oviewer/move_vertical.go
+++ b/oviewer/move_vertical.go
@@ -236,9 +236,16 @@ func leftX(width int, lc contents) []int {
 	if width <= 0 {
 		return []int{0}
 	}
-	listX := make([]int, 0, (len(lc)/width)+1)
+	if len(lc) == 0 {
+		return []int{0}
+	}
+	end := len(lc)
+	if lc[len(lc)-1].mainc == '\n' {
+		end--
+	}
+	listX := make([]int, 0, (end/width)+1)
 	listX = append(listX, 0)
-	for n := width; n < len(lc); n += width {
+	for n := width; n < end; n += width {
 		if lc[n-1].width == 2 {
 			n--
 		}
diff --git a/oviewer/prepare_draw.go b/oviewer/prepare_draw.go
index 4ab6de21..752ba401 100644
--- a/oviewer/prepare_draw.go
+++ b/oviewer/prepare_draw.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"log"
 	"math"
+	"reflect"
 	"sort"
 	"strconv"
 	"time"
@@ -81,14 +82,103 @@ func (root *Root) prepareDraw(ctx context.Context) {
 		root.Doc.topLX, root.Doc.topLN = tX, tN-root.scr.headerEnd
 		root.Doc.showGotoF = false
 	}
+
 	if root.Doc.ColumnWidth && len(root.Doc.columnWidths) == 0 {
 		root.Doc.setColumnWidths()
 	}
 
+	// Sets the maximum width of a column.
+	if root.Doc.Converter == "align" {
+		root.setAlignColumnWidths()
+	}
+
 	// Prepare the lines.
 	root.scr.lines = root.prepareLines(root.scr.lines)
 }
 
+// setAlignColumnWidths sets the maximum width of the column.
+func (root *Root) setAlignColumnWidths() {
+	m := root.Doc
+	m.alignConv.WidthF = m.ColumnWidth
+	if !m.alignConv.WidthF {
+		root.Doc.alignConv.delimiter = m.ColumnDelimiter
+		root.Doc.alignConv.delimiterReg = m.ColumnDelimiterReg
+	}
+
+	maxWidths := make([]int, 0, len(m.alignConv.maxWidths))
+	for ln := root.scr.headerLN; ln < root.scr.headerEnd; ln++ {
+		maxWidths = m.maxWidths(maxWidths, ln)
+	}
+	for ln := root.scr.sectionHeaderLN; ln < root.scr.sectionHeaderEnd; ln++ {
+		maxWidths = m.maxWidths(maxWidths, ln)
+	}
+	startLN := m.topLN + m.firstLine()
+	endLN := startLN + root.scr.vHeight
+	for ln := startLN; ln < endLN; ln++ {
+		maxWidths = m.maxWidths(maxWidths, ln)
+	}
+
+	if !reflect.DeepEqual(m.alignConv.maxWidths, maxWidths) {
+		m.alignConv.orgWidths = m.columnWidths
+		m.alignConv.maxWidths = maxWidths
+		m.ClearCache()
+	}
+}
+
+// maxWidths returns the maximum width of the column.
+func (m *Document) maxWidths(columnWidth []int, lN int) []int {
+	str, err := m.LineStr(lN)
+	if err != nil {
+		return columnWidth
+	}
+	lc := StrToContents(str, m.TabWidth)
+	if m.ColumnWidth {
+		return m.maxWidthsWidth(lc, columnWidth)
+	}
+	return m.maxWidthsDelm(lc, columnWidth)
+}
+
+// maxWidthsDelm returns the maximum width of the column.
+func (m *Document) maxWidthsDelm(lc contents, columnWidth []int) []int {
+	str, pos := ContentsToStr(lc)
+	indexes := allIndex(str, m.ColumnDelimiter, m.ColumnDelimiterReg)
+	if len(indexes) == 0 {
+		return columnWidth
+	}
+	s := 0
+	for i := 0; i < len(indexes); i++ {
+		e := pos.x(indexes[i][1])
+		width := e - s
+		if len(columnWidth) <= i {
+			columnWidth = append(columnWidth, width)
+		} else {
+			columnWidth[i] = max(width, columnWidth[i])
+		}
+		s = e
+	}
+	return columnWidth
+}
+
+// maxWidthsWidth returns the maximum width of the column.
+func (m *Document) maxWidthsWidth(lc contents, columnWidth []int) []int {
+	indexes := m.columnWidths
+	if len(indexes) == 0 {
+		return columnWidth
+	}
+	s := 0
+	for i := 0; i < len(indexes); i++ {
+		e := findColumnEnd(lc, indexes, i) + 1
+		width := e - s
+		if len(columnWidth) <= i {
+			columnWidth = append(columnWidth, width)
+		} else {
+			columnWidth[i] = max(width, columnWidth[i])
+		}
+		s = e
+	}
+	return columnWidth
+}
+
 // shiftBody shifts the section header so that it is not hidden by it.
 func (m *Document) shiftBody(lX int, lN int, shStart int, shEnd int) (int, int) {
 	if m.jumpTargetHeight != 0 {
@@ -367,7 +457,16 @@ func (root *Root) columnWidthHighlight(line LineC) {
 	start, end := -1, -1
 	for c := 0; c < len(indexes)+1; c++ {
 		start = end + 1
-		end = findColumnEnd(line.lc, indexes, c)
+		if m.Converter == "align" {
+			l := len(line.lc)
+			if c < len(m.alignConv.maxWidths) {
+				l = m.alignConv.maxWidths[c]
+			}
+			end = start + l
+			end = min(end, len(line.lc))
+		} else {
+			end = findColumnEnd(line.lc, indexes, c)
+		}
 
 		if m.ColumnRainbow {
 			RangeStyle(line.lc, start, end, root.StyleColumnRainbow[c%numC])
diff --git a/oviewer/utils.go b/oviewer/utils.go
index 0577161b..8eb3abb1 100644
--- a/oviewer/utils.go
+++ b/oviewer/utils.go
@@ -95,6 +95,13 @@ func allStringIndex(s string, substr string) [][]int {
 		s = s[pos+width:]
 		result = append(result, []int{pos + offSet, pos + offSet + width})
 		offSet += pos + width
+
+		if len(s) > 0 && s[0] == '"' {
+			qpos := strings.Index(s[1:], `"`)
+			s = s[qpos+2:]
+			offSet += qpos + 2
+		}
+
 		pos = strings.Index(s, substr)
 	}
 	return result
diff --git a/oviewer/utils_test.go b/oviewer/utils_test.go
index 51aa15bd..b9533d1a 100644
--- a/oviewer/utils_test.go
+++ b/oviewer/utils_test.go
@@ -520,6 +520,28 @@ func Test_allStringIndex(t *testing.T) {
 			},
 			want: nil,
 		},
+		{
+			name: "testDoubleQuote",
+			args: args{
+				s:      `a,"b,c",d`,
+				substr: ",",
+			},
+			want: [][]int{
+				{1, 2},
+				{7, 8},
+			},
+		},
+		{
+			name: "testDoubleQuote2",
+			args: args{
+				s:      `a,"060  ",d`,
+				substr: ",",
+			},
+			want: [][]int{
+				{1, 2},
+				{9, 10},
+			},
+		},
 	}
 	for _, tt := range tests {
 		tt := tt