diff --git a/Makefile b/Makefile
index 1a43b56..f1147a3 100644
--- a/Makefile
+++ b/Makefile
@@ -18,5 +18,8 @@ clippy: ## run clippy
 journeytests: ## run journey tests
 	./tests/cat.sh
 
+fuzz: ## run fuzz tests for 30 seconds
+	cargo install cargo-fuzz
+	cargo fuzz run round-trip -- -only_ascii=1 -max_total_time=30
 
-tests: docs clippy unittests journeytests  ## run all tests
+tests: docs clippy unittests journeytests fuzz  ## run all tests
diff --git a/fuzz/.gitignore b/fuzz/.gitignore
new file mode 100644
index 0000000..1a45eee
--- /dev/null
+++ b/fuzz/.gitignore
@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
new file mode 100644
index 0000000..c470d78
--- /dev/null
+++ b/fuzz/Cargo.lock
@@ -0,0 +1,104 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "arbitrary"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2d098ff73c1ca148721f37baad5ea6a465a13f9573aba8641fbbbae8164a54e"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+dependencies = [
+ "jobserver",
+]
+
+[[package]]
+name = "jobserver"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "936cfd212a0155903bcbc060e316fb6cc7cbf2e1907329391ebadc1fe0ce77c2"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.144"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b00cc1c228a6782d0f076e7b232802e0c5689d41bb5df366f2a6b6621cfdfe1"
+
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "beb09950ae85a0a94b27676cccf37da5ff13f27076aa1adbc6545dd0d0e1bd4e"
+dependencies = [
+ "arbitrary",
+ "cc",
+ "once_cell",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "once_cell"
+version = "1.17.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
+
+[[package]]
+name = "pulldown-cmark"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a1a2f1f0a7ecff9c31abbe177637be0e97a0aef46cf8738ece09327985d998"
+dependencies = [
+ "bitflags",
+ "memchr",
+ "unicase",
+]
+
+[[package]]
+name = "pulldown-cmark-to-cmark"
+version = "10.0.4"
+dependencies = [
+ "pulldown-cmark",
+]
+
+[[package]]
+name = "pulldown-cmark-to-cmark-fuzz"
+version = "0.0.0"
+dependencies = [
+ "libfuzzer-sys",
+ "pulldown-cmark",
+ "pulldown-cmark-to-cmark",
+]
+
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
+]
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
new file mode 100644
index 0000000..4830225
--- /dev/null
+++ b/fuzz/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "pulldown-cmark-to-cmark-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+pulldown-cmark = { version = "0.9.0", default-features = false }
+
+[dependencies.pulldown-cmark-to-cmark]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "round-trip"
+path = "fuzz_targets/round-trip.rs"
+test = false
+doc = false
diff --git a/fuzz/fuzz_targets/round-trip.rs b/fuzz/fuzz_targets/round-trip.rs
new file mode 100644
index 0000000..d3d0042
--- /dev/null
+++ b/fuzz/fuzz_targets/round-trip.rs
@@ -0,0 +1,42 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use pulldown_cmark::Parser;
+use pulldown_cmark_to_cmark::cmark;
+
+fn round_trip(text: &str) -> String {
+    let mut result = String::with_capacity(text.len());
+    cmark(Parser::new(&text), &mut result).unwrap();
+    result
+}
+
+fn print_events(text: &str) {
+    eprintln!("{text:?} -> [");
+    for event in Parser::new(&text) {
+        eprintln!("  {event:?}");
+    }
+    eprintln!("]");
+}
+
+fuzz_target!(|text: String| {
+    let round_trip_1 = round_trip(&text);
+    let round_trip_2 = round_trip(&round_trip_1);
+    let round_trip_3 = round_trip(&round_trip_2);
+    let round_trip_4 = round_trip(&round_trip_3);
+    if round_trip_3 != round_trip_4 {
+        print_events(&text);
+        print_events(&round_trip_1);
+        print_events(&round_trip_2);
+        print_events(&round_trip_3);
+        print_events(&round_trip_4);
+
+        panic!(
+            "round-trip failed:\n\
+             -- {text:?}\n\
+             -> {round_trip_1:?}\n\
+             -> {round_trip_2:?}\n\
+             -> {round_trip_3:?}\n\
+             -> {round_trip_4:?}"
+        );
+    }
+});