diff --git a/tool/cfdomains/README.md b/tool/cfdomains/README.md
new file mode 100644
index 0000000000..1b59199d46
--- /dev/null
+++ b/tool/cfdomains/README.md
@@ -0,0 +1,40 @@
+# CfDomains
+
+- Linux
+```
+$ wget https://git.disroot.org/dCF/deCloudflare/src/master/tool/cfdomains/cfdomains.linux -O cfdomains
+$ chmod +x cfdomains
+$ cfdomains
+```
+
+- [Windows](aaaa!replace!me!)
+- [Mac OS](aaaa!replace!me!)
+
+
+----
+
+```
+Usage:
+        cfdomains example.com
+        cfdomains [--dir|--dl|--dl2]
+        cfdomains --report example.com
+
+Details:
+        cfdomains example.com
+                return "y", "n", or "e"
+                        y: Domain is on the list
+                        n: Domain is not listed
+                        e: List data not found (fix it by running --dl)
+
+        cfdomains --dir
+                Change list directory
+                Current directory: ./cfdomains_Data/
+
+        cfdomains --dl|dl2
+                dl: Download list files from Archive.org
+                dl2: Download list files from deCloudflare git
+
+        cfdomains --report example.com
+                Submit unlisted domain to #Karma for analysis
+                Only the domain will be submitted. We NEVER record anything else.
+```