diff --git a/cmd/alp/cmd/flags.go b/cmd/alp/cmd/flags.go
index 9cab9a8..cce8e3f 100644
--- a/cmd/alp/cmd/flags.go
+++ b/cmd/alp/cmd/flags.go
@@ -97,7 +97,7 @@ func (f *flags) defineLoad(cmd *cobra.Command) {
 }
 
 func (f *flags) defineFormat(cmd *cobra.Command) {
-	cmd.PersistentFlags().StringP(flagFormat, "", options.DefaultFormatOption, "The output format (table, markdown, tsv, csv and html)")
+	cmd.PersistentFlags().StringP(flagFormat, "", options.DefaultFormatOption, "The output format (table, markdown, tsv, csv, html, and json)")
 }
 
 func (f *flags) defineSort(cmd *cobra.Command) {
diff --git a/convert/json.go b/convert/json.go
new file mode 100644
index 0000000..f60b252
--- /dev/null
+++ b/convert/json.go
@@ -0,0 +1,30 @@
+package convert
+
+import "encoding/json"
+
+func ToJSONValues(data [][]string) [][]interface{} {
+	i := [][]interface{}{}
+	for _, values := range data {
+		l := []interface{}{}
+		for _, val := range values {
+			n := json.Number(val)
+
+			i64, err := n.Int64()
+			if err == nil {
+				l = append(l, i64)
+				continue
+			}
+
+			f64, err := n.Float64()
+			if err == nil {
+				l = append(l, f64)
+				continue
+			}
+
+			l = append(l, val)
+		}
+		i = append(i, l)
+	}
+
+	return i
+}
diff --git a/counter/printer.go b/counter/printer.go
index ca6fdca..a55afa2 100644
--- a/counter/printer.go
+++ b/counter/printer.go
@@ -1,13 +1,14 @@
 package counter
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"strings"
 
-	"github.com/tkuchiki/alp/html"
-
 	"github.com/olekukonko/tablewriter"
+	"github.com/tkuchiki/alp/convert"
+	"github.com/tkuchiki/alp/html"
 )
 
 const (
@@ -55,6 +56,8 @@ func (p *Printer) Print(groups *groups) {
 		p.printCSV(groups)
 	case "html":
 		p.printHTML(groups)
+	case "json":
+		p.printJSON(groups)
 	}
 }
 
@@ -146,3 +149,21 @@ func (p *Printer) printHTML(groups *groups) {
 	content, _ := html.RenderTableWithGridJS("alp", headers, data, p.printOptions.paginationLimit)
 	fmt.Println(content)
 }
+
+func (p *Printer) printJSON(groups *groups) {
+	var headers []string
+	headers = append(headers, defaultSumHeader)
+	headers = append(headers, groups.keys...)
+
+	var data [][]string
+	data = append(data, headers)
+
+	for _, group := range groups.groups {
+		data = append(data, p.generateLine(groups.keys, group))
+	}
+
+	i := convert.ToJSONValues(data)
+	b, _ := json.Marshal(i)
+
+	fmt.Println(string(b))
+}
diff --git a/log_reader/printer.go b/log_reader/printer.go
index 6774313..c95b993 100644
--- a/log_reader/printer.go
+++ b/log_reader/printer.go
@@ -1,11 +1,13 @@
 package log_reader
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"strings"
 
 	"github.com/olekukonko/tablewriter"
+	"github.com/tkuchiki/alp/convert"
 	"github.com/tkuchiki/alp/html"
 )
 
@@ -153,6 +155,8 @@ func (p *Printer) Print(logs []*AccessLog) {
 		p.printCSV(logs)
 	case "html":
 		p.printHTML(logs)
+	case "json":
+		p.printJSON(logs)
 	}
 }
 
@@ -221,3 +225,17 @@ func (p *Printer) printHTML(logs []*AccessLog) {
 	content, _ := html.RenderTableWithGridJS("alp", p.headers, data, p.printOptions.paginationLimit)
 	fmt.Println(content)
 }
+
+func (p *Printer) printJSON(logs []*AccessLog) {
+	var data [][]string
+	data = append(data, headerKeys)
+
+	for _, l := range logs {
+		data = append(data, p.GenerateLine(l, true))
+	}
+
+	i := convert.ToJSONValues(data)
+	b, _ := json.Marshal(i)
+
+	fmt.Println(string(b))
+}
diff --git a/stats/printer.go b/stats/printer.go
index d26ad3e..4742e0c 100644
--- a/stats/printer.go
+++ b/stats/printer.go
@@ -1,11 +1,13 @@
 package stats
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"strings"
 
 	"github.com/olekukonko/tablewriter"
+	"github.com/tkuchiki/alp/convert"
 	"github.com/tkuchiki/alp/helpers"
 	"github.com/tkuchiki/alp/html"
 )
@@ -389,6 +391,8 @@ func (p *Printer) Print(hs, hsTo *HTTPStats) {
 		p.printCSV(hs, hsTo)
 	case "html":
 		p.printHTML(hs, hsTo)
+	case "json":
+		p.printJSON(hs, hsTo)
 	}
 }
 
@@ -551,3 +555,30 @@ func (p *Printer) printHTML(hsFrom, hsTo *HTTPStats) {
 	content, _ := html.RenderTableWithGridJS("alp", p.headers, data, p.printOptions.paginationLimit)
 	fmt.Println(content)
 }
+
+func (p *Printer) printJSON(hsFrom, hsTo *HTTPStats) {
+	var data [][]string
+
+	data = append(data, p.keywords)
+
+	if hsTo == nil {
+		for _, s := range hsFrom.stats {
+			data = append(data, p.GenerateLine(s, true))
+		}
+	} else {
+		for _, to := range hsTo.stats {
+			from := findHTTPStatFrom(hsFrom, to)
+
+			if from == nil {
+				data = append(data, p.GenerateLine(to, false))
+			} else {
+				data = append(data, p.GenerateLineWithDiff(from, to, false))
+			}
+		}
+	}
+
+	i := convert.ToJSONValues(data)
+	b, _ := json.Marshal(i)
+
+	fmt.Println(string(b))
+}