diff --git a/duplicatefinder.py b/duplicatefinder.py
new file mode 100644
index 0000000..e87d712
--- /dev/null
+++ b/duplicatefinder.py
@@ -0,0 +1,37 @@
+from __future__ import print_function
+from argparse import ArgumentParser
+from os.path import join
+from os import walk
+# Parsing parameters
+editing = "atom_edit"
+parser = ArgumentParser(description="Searches through CTF writeups for duplicate links on challenge READMEs", epilog="A tool for the CTFs writeups repositories https://github.com/ctfs", )
+parser.add_argument("writeupsdir", type=str, help="Directory containing all ctfdirs, e.g. write-ups-2017/")
+parser.add_argument("-a", "--atom", dest=editing, action="store_true")
+args = parser.parse_args()
+if args.atom_edit:
+    from os import system
+# Files with duplicates counter
+dup_files = 0
+# Recursively walks through all files in writeups-dir
+for root, directories, files in walk(args.writeupsdir):
+    for f in files:
+        # If its a readme
+        if str(f).lower() == "readme.md":
+            with open(join(root, f), "rb") as q:
+                # Make a list of lines
+                lines = q.readlines()
+            links = []
+            for line in lines:
+                # Collect only the links
+                if b"* http" in line:
+                    links.append(line.strip())
+            # Compare length of original and one with duplicates removed
+            if len(links) is not len(list(set(links))):
+                print("Duplicate links in file", join(root, f))
+                dup_files += 1
+                # If user chooses to edit duplicate files, open with Atom
+                if args.atom_edit:
+                    system("atom " + join(root, f))
+print(str(dup_files) + " files with duplicates found.")
+if args.atom_edit:
+    print("\nAll " + str(dup_files) + " duplicate files opened with Atom.")