diff --git a/convert.py b/convert.py
new file mode 100644
index 0000000..f68324b
--- /dev/null
+++ b/convert.py
@@ -0,0 +1,64 @@
+import pathlib
+import srt
+from datetime import datetime
+from pathlib import Path
+
+
+pathlib.Path(Path(__file__).parent / 'cnt').mkdir(parents=True, exist_ok=True)
+
+# Files auto-generated by YT have each subtitle line repeating 3 times, once at
+# the end of a pair, once by itself and once at the beginning of a pair.
+# But sometimes only the first case (end of a pair) exists, which are lines
+# 3 + 10i.
+
+for srt_file in [x for x in Path(__file__).parent.glob('**/*.srt') if x.is_file()]:
+    with open(srt_file, 'r', encoding='utf-8') as file_object:
+        contents = file_object.readlines()
+
+        # Check for repeating lines from auto-generated subtitles (use lines 3+10i)
+        # or non-repeating subtitles from a manual upload (parse using srt library)
+
+        if (
+            len(contents) > 40 and
+            ((contents[3].strip() != '' and contents[3] == contents[7] and contents[7] == contents[12]) or
+            (contents[13].strip() != '' and contents[13] == contents[17] and contents[17] == contents[22]) or
+            (contents[23].strip() != '' and contents[23] == contents[27] and contents[27] == contents[32]) or
+            (contents[33].strip() != '' and contents[33] == contents[37] and contents[37] == contents[42]))
+            ):
+            print(srt_file.name + ' is a repeating file')
+
+            # Make lists of lines and times
+
+            lines = []
+            i = 0
+            while 3+10*i < len(contents):
+                lines.append(contents[3+10*i])
+                i += 1
+
+            times = []
+            i = 0
+            while i < len(lines):
+                t = datetime.strptime(contents[1+10*i][:8], '%H:%M:%S')
+                times.append(str(t.hour*3600 + t.minute*60 + t.second) + '\n')
+                i += 1
+
+        else:
+            print(srt_file.name + ' is a nonrepeating file')
+            subtitle_generator = srt.parse(file_object)
+            subtitles = list(subtitle_generator)
+            lines = []
+            for i in subtitles:
+                lines.append(str(i.content.replace('\n', ' ')) + '\n')
+            times = []
+            for i in subtitles:
+                times.append(str(int(i.start.total_seconds())) + '\n')
+
+        # Make .en.cnt with lines then times
+
+        with open(str(Path(__file__).parent / 'cnt') + '\\' + srt_file.name[:-7] + '.en.cnt', 'a') as cnt_file:
+            for i in lines:
+                cnt_file.write(i)
+    
+        with open(str(Path(__file__).parent / 'cnt') + '\\' + srt_file.name[:-7] + '.en.cnt', 'a') as cnt_file:
+            for i in times:
+                cnt_file.write(str(i))