diff --git a/include/lib.h b/include/lib.h
index 39dc03b..41a25d7 100644
--- a/include/lib.h
+++ b/include/lib.h
@@ -3,4 +3,6 @@
 void die(const char *message);
 
 char* formatBytes(double *bytes);
+
+int intlen(unsigned i);
 #endif
diff --git a/src/lib.c b/src/lib.c
index 0a98435..b7ee492 100644
--- a/src/lib.c
+++ b/src/lib.c
@@ -24,3 +24,14 @@ char *formatBytes(double *bytes) {
 
   return SIZES[div];
 }
+
+int intlen(unsigned i) {
+  int l = 1;
+
+  while (i > 9) {
+    l++;
+    i /= 10;
+  }
+
+  return l;
+}
diff --git a/src/main.c b/src/main.c
index b3724e3..124abdf 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,23 +1,21 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "lib.h"
 
 #define INVERT_T "\x1b[7m"
 #define UINVERT_T "\x1b[27m"
+#define GREY "\x1b[90m"
+#define RESET "\x1b[0m"
 
-int main(int argc, char *argv[]) {
-  if (argc < 2) {
-    printf("usage: catclone <FILE>\n");
-    die("args");
-  }
-
-  FILE *fp = fopen(argv[1], "r+b");
+int run(char *filename) {
+  FILE *fp = fopen(filename, "r+b");
 
   if (fp == NULL)
     die("fopen");
 
-  printf("%s%s%s\r\n", INVERT_T, argv[1], UINVERT_T);
+  printf("%s%s%s\r\n", INVERT_T, filename, UINVERT_T);
 
   int bufsize = 4;
   char *buf;
@@ -27,7 +25,8 @@ int main(int argc, char *argv[]) {
     die("malloc");
 
   double fsize = 0;
-  int offset = 0;
+  unsigned offset = 0;
+  unsigned lc = 0;
   char c;
   while (fread(&c, sizeof(char), 1, fp) > 0) {
     if (fsize == bufsize - 1) {
@@ -42,17 +41,54 @@ int main(int argc, char *argv[]) {
       buf = new_buf;
     }
 
+    if (c == '\n')
+      lc++;
+
     buf[offset++] = c;
     fsize++;
   }
+  fclose(fp);
 
-  printf("\r\n");
+  int lcpad = intlen(lc);
+
+  lc = 0;
+  char pc = '\0';
+  for (int i = 0; i < offset; i++) {
+    c = buf[i];
+
+    if (pc == '\n' || i == 0) {
+      lc++;
+      int padlen = lcpad - intlen(lc);
+      char padding[padlen];
+      memset(padding, '0', padlen);
+      printf("%s%s%d:%s ", GREY, padding, lc, RESET);
+    }
+
+    pc = c;
+    printf("%c", c);
+  }
 
   char *format = formatBytes(&fsize);
 
   printf("%s%.2f %s%s\r\n", INVERT_T, fsize, format, UINVERT_T);
 
-  fclose(fp);
+  return 0;
+}
+
+int main(int argc, char *argv[]) {
+  if (argc < 2) {
+    printf("usage: catclone <FILE>\n");
+    die("args");
+  }
+
+  for (int i = 1; i < argc; i++) {
+    if (run(argv[i]) != 0)
+      die("run");
+
+    if (i + 1 != argc) {
+      printf("\r\n");
+    }
+  }
 
   return 0;
 }