diff --git a/README.md b/README.md
index 84631d6..da0be70 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 schema draft formats. 
+
 # 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 d48db19..98954d9 100644
--- a/src/string-format-check.cpp
+++ b/src/string-format-check.cpp
@@ -175,6 +175,8 @@ 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]))*$)"};
 
@@ -304,6 +306,11 @@ 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);
diff --git a/test/JSON-Schema-Test-Suite/tests/draft7/optional/format/uuid.json b/test/JSON-Schema-Test-Suite/tests/draft7/optional/format/uuid.json
new file mode 100644
index 0000000..31e525c
--- /dev/null
+++ b/test/JSON-Schema-Test-Suite/tests/draft7/optional/format/uuid.json
@@ -0,0 +1,85 @@
+[
+    {
+        "description": "uuid format",
+        "schema": {
+            "format": "uuid"
+        },
+        "tests": [
+            {
+                "description": "all upper-case",
+                "data": "2EB8AA08-AA98-11EA-B4AA-73B441D16380",
+                "valid": true
+            },
+            {
+                "description": "all lower-case",
+                "data": "2eb8aa08-aa98-11ea-b4aa-73b441d16380",
+                "valid": true
+            },
+            {
+                "description": "mixed case",
+                "data": "2eb8aa08-AA98-11ea-B4Aa-73B441D16380",
+                "valid": true
+            },
+            {
+                "description": "all zeroes is valid",
+                "data": "00000000-0000-0000-0000-000000000000",
+                "valid": true
+            },
+            {
+                "description": "wrong length",
+                "data": "2eb8aa08-aa98-11ea-b4aa-73b441d1638",
+                "valid": false
+            },
+            {
+                "description": "missing section",
+                "data": "2eb8aa08-aa98-11ea-73b441d16380",
+                "valid": false
+            },
+            {
+                "description": "bad characters (not hex)",
+                "data": "2eb8aa08-aa98-11ea-b4ga-73b441d16380",
+                "valid": false
+            },
+            {
+                "description": "no dashes",
+                "data": "2eb8aa08aa9811eab4aa73b441d16380",
+                "valid": false
+            },
+            {
+                "description": "too few dashes",
+                "data": "2eb8aa08aa98-11ea-b4aa73b441d16380",
+                "valid": false
+            },
+            {
+                "description": "too many dashes",
+                "data": "2eb8-aa08-aa98-11ea-b4aa73b44-1d16380",
+                "valid": false
+            },
+            {
+                "description": "dashes in the wrong spot",
+                "data": "2eb8aa08aa9811eab4aa73b441d16380----",
+                "valid": false
+            },
+            {
+                "description": "valid version 4",
+                "data": "98d80576-482e-427f-8434-7f86890ab222",
+                "valid": true
+            },
+            {
+                "description": "valid version 5",
+                "data": "99c17cbb-656f-564a-940f-1a4568f03487",
+                "valid": true
+            },
+            {
+                "description": "hypothetical version 6",
+                "data": "99c17cbb-656f-664a-940f-1a4568f03487",
+                "valid": true
+            },
+            {
+                "description": "hypothetical version 15",
+                "data": "99c17cbb-656f-f64a-940f-1a4568f03487",
+                "valid": true
+            }
+        ]
+    }
+]
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