diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0df14b2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.idea/
+out/
+!out/.gitkeep
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a9119ae
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+#!make
+
+build-linux:
+	GOOS=linux go build -o out/ff_renamer main.go
+
+build-windows:
+	GOOS=windows go build -o out/ff_renamer.exe main.go
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..f5a521a
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module ff_renamer
+
+go 1.21
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..09ff49c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,106 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"slices"
+	"strconv"
+	"strings"
+)
+
+type Pair struct {
+	originFull string
+	newName    string
+	newFull    string
+	skip       bool
+}
+
+var (
+	exts = []string{
+		".jpg", ".jpeg", ".jfif",
+		".png", ".gif", ".webp",
+		".mp4", ".MP4", ".webm",
+	}
+
+	renameSlice []Pair
+
+	pattern, _ = regexp.Compile("^\\d+(-\\d)?$") // 123456789, 123456789-1
+)
+
+func generateName(baseName string) string {
+	counter := 1
+	name := baseName
+
+loop:
+	for {
+		for _, pair := range renameSlice {
+			if pair.newName == name {
+				name = fmt.Sprintf("%s-%d", baseName, counter)
+				counter++
+				continue loop
+			}
+		}
+		break
+	}
+
+	return name
+}
+
+func main() {
+	entries, err := os.ReadDir(".")
+	if err != nil {
+		panic(err)
+	}
+
+	renameSlice = make([]Pair, 0)
+
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+
+		ext := filepath.Ext(entry.Name())
+		extL := strings.ToLower(ext)
+		if !slices.Contains(exts, extL) {
+			continue
+		}
+
+		if pattern.MatchString(strings.TrimSuffix(entry.Name(), ext)) {
+			renameSlice = append(renameSlice, Pair{
+				originFull: entry.Name(),
+				skip:       true})
+			continue
+		}
+
+		info, err := entry.Info()
+		if err != nil {
+			panic(err)
+		}
+
+		newName := generateName(strconv.FormatInt(info.ModTime().Unix(), 10))
+
+		renameSlice = append(renameSlice, Pair{
+			originFull: entry.Name(),
+			newName:    newName,
+			newFull:    newName + extL})
+	}
+
+	counter := 0
+	for i, pair := range renameSlice {
+		if pair.skip || pair.originFull == pair.newFull {
+			continue
+		}
+
+		fmt.Printf("%d. %s --> %s\n", i+1, pair.originFull, pair.newFull)
+		err := os.Rename(pair.originFull, pair.newFull)
+		if err != nil {
+			panic(err)
+		}
+		counter++
+	}
+
+	fmt.Printf("Total: %d\n", len(renameSlice))
+	fmt.Printf("Renamed: %d\n", counter)
+}
diff --git a/renamer.py b/renamer.py
deleted file mode 100755
index 421c9e2..0000000
--- a/renamer.py
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/usr/bin/python3
-# vi: set tabstop=4 shiftwidth=4 expandtab : #
-# version: 3.20220218
-
-import re
-import os
-
-pattern = re.compile('^\d{10}$')
-unique_names = set()
-list_files = sorted(os.listdir(path = '.'))
-
-for filename in list_files:
-    if not os.path.isfile(filename):
-        continue
-
-    (original_name, ext) = os.path.splitext(filename)
-    if not (ext in ['.jpg', '.jpeg', '.jfif', '.png', '.gif', '.webp', '.mp4', '.MP4', '.webm']):
-        continue
-
-    if pattern.match(original_name) != None:
-        unique_names.add(original_name)
-        continue
-
-    file_mtime = int(os.stat(filename).st_mtime)
-    new_name = file_mtime
-    suffix = 1
-    while new_name in unique_names:
-        new_name = '%s-%d' % (file_mtime, suffix)
-        suffix = suffix + 1
-    unique_names.add(new_name)
-    full_new_name = '%s%s' % (new_name, ext)
-    print('%s -> %s' % (filename, full_new_name))
-    os.rename(filename, full_new_name)
-