diff --git a/cert_checker.py b/cert_checker.py
new file mode 100644
index 0000000..94ac283
--- /dev/null
+++ b/cert_checker.py
@@ -0,0 +1,67 @@
+import os
+import subprocess
+import json
+import re
+from datetime import datetime, timedelta
+
+def get_cert_info(cert_path):
+    # Use openssl command to get certificate subject and expiration date
+    openssl_cmd = [
+        "openssl", "x509", "-noout", "-subject", "-enddate", "-in", cert_path
+    ]
+    process = subprocess.Popen(openssl_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    output, _ = process.communicate()
+
+    if process.returncode == 0:
+        # Extract domain name and expiration date from openssl output
+        subject_str, expiration_date_str = map(lambda x: x.split("=", 1)[1].strip(), output.decode("utf-8").split("\n")[:-1])
+        domain_name = subject_str.split("/")[0].replace("CN = ","")
+        expiration_date = datetime.strptime(expiration_date_str, "%b %d %H:%M:%S %Y %Z")
+        days_remaining = (expiration_date - datetime.now()).days
+        return {"path": cert_path,"domain": domain_name, "expiration_date": expiration_date_str, "days_remaining": days_remaining}
+    else:
+        return None
+
+def check_and_write_cert_info(directory_path, output_json_path):
+    cert_info_list = []
+    rel_files = []
+    for root, _, files in os.walk(directory_path):
+        #print(files)
+        for file in files:
+            cfg = directory_path + file
+            search_term = "ssl_certificate "
+            for line in open(cfg, 'r'):
+                if re.search(search_term, line):
+                    l = line.split()
+                    rel_files.append(l[1].replace(";",""))
+                    if line == None:
+                        print('no matches found')
+        print(rel_files)
+    #     fullchain_pem_files = [file for file in files if file.lower() == "fullchain.pem"]
+
+
+
+    for fullchain_pem_file in rel_files:
+        
+        fullchain_pem_file = fullchain_pem_file.replace("/data/","/share/docker_data/nginx/data/")
+        fullchain_pem_file = fullchain_pem_file.replace("/etc/letsencrypt/","/share/docker_data/nginx/letsencrypt/")
+        print(f"Checking {fullchain_pem_file}")
+        cert_info = get_cert_info(fullchain_pem_file)
+
+        if cert_info:
+            cert_info_list.append(cert_info)
+
+    # Write the cert info to a JSON file
+    with open(output_json_path, 'w') as json_file:
+        json.dump(cert_info_list, json_file, indent=2)
+    print(json.dumps(cert_info_list))
+
+if __name__ == "__main__":
+    # Specify the directory path you want to check recursively
+    directory_to_check = "/share/docker_data/nginx/data/nginx/proxy_host/"
+
+    # Specify the output JSON file path
+    output_json_path = "/tmp/cert_info.json"
+
+    # Check for fullchain.pem files and write cert info to JSON file
+    check_and_write_cert_info(directory_to_check, output_json_path)