diff --git a/fuzz/json-fuzzer.dict b/fuzz/json-fuzzer.dict
new file mode 100644
index 000000000..a183f732e
--- /dev/null
+++ b/fuzz/json-fuzzer.dict
@@ -0,0 +1,37 @@
+# JSON structural tokens
+"{"
+"}"
+"["
+"]"
+":"
+","
+"\""
+
+# JSON values
+"true"
+"false"
+"null"
+"0"
+"-1"
+"123456789"
+"\\\""
+"\\\\"
+"\\n"
+"\\u0000"
+
+# tmux layout/control-mode keys
+"V"
+"L"
+"W"
+"H"
+"X"
+"Y"
+"T"
+"S"
+"id"
+"result"
+"error"
+"routes"
+"uri"
+"name"
+"value"
diff --git a/fuzz/json-fuzzer.options b/fuzz/json-fuzzer.options
new file mode 100644
index 000000000..9fda93fcb
--- /dev/null
+++ b/fuzz/json-fuzzer.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 4096