diff --git a/README.md b/README.md
index 7387891..c835575 100644
--- a/README.md
+++ b/README.md
@@ -84,3 +84,17 @@
 - `console.profile`
 - `console.profileEnd`
 - `console.count`
+
+## Supported formatting
+
+The following formatting options available:
+
+Format chars:
+
+*  `%j` - format arg as JSON
+*  `%o` - format arg as JSON
+*  `%c` - format arg as `''`. No color formatting could be done.
+*  `%%` - replace with `'%'`
+
+any other char following `%` will format it's
+arg via `toString()`.