diff --git a/README.md b/README.md
index 84631d6..591add3 100644
--- a/README.md
+++ b/README.md
@@ -332,6 +332,8 @@ json_validator validator(nullptr, // or loader-callback
                          my_format_checker); // create validator
 ```
 
+## Default Checker
+
 The library contains a default-checker, which does some checks. It needs to be
 provided manually to the constructor of the validator:
 
@@ -340,6 +342,10 @@ json_validator validator(loader, // or nullptr for no loader
                          nlohmann::json_schema::default_string_format_check);
 ```
 
+Supported formats: `date-time, date, time, email, hostname, ipv4, ipv6, uuid, regex`
+
+More formats can be added in `src/string-format-check.cpp`. Please contribute implementions for missing json scheme draft format. 
+
 # Contributing
 
 Before opening a pull request, please apply the coding style given in the
diff --git a/src/string-format-check.cpp b/src/string-format-check.cpp
index 28a818c..7261f2f 100644
--- a/src/string-format-check.cpp
+++ b/src/string-format-check.cpp
@@ -166,6 +166,8 @@ const std::string host{
     "|" + regName +
     ")"};
 
+const std::string uuid{R"([0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12})"};
+
 // from http://stackoverflow.com/questions/106179/regular-expression-to-match-dns-hostname-or-ip-address
 const std::string hostname{R"(^([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])(\.([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9]))*$)"};
 
@@ -295,6 +297,11 @@ void default_string_format_check(const std::string &format, const std::string &v
 		if (!std::regex_match(value, ipv6Regex)) {
 			throw std::invalid_argument(value + " is not an IPv6 string according to RFC 5954.");
 		}
+	} else if (format == "uuid") {
+		static const std::regex uuidRegex{uuid};
+		if (!std::regex_match(value, uuidRegex)) {
+			throw std::invalid_argument(value + " is not an uuid string according to RFC 4122.");
+		}
 	} else if (format == "regex") {
 		try {
 			std::regex re(value, std::regex::ECMAScript);