diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b93320d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,17 @@
+# Jitfuck
+
+A (very limited) JIT compiler for
+[brainfuck](https://en.wikipedia.org/wiki/Brainfuck), written in
+x86_64 assembly.
+
+To build (with [fasm](https://flatassembler.net/)):
+
+```
+fasm jitfuck.asm
+```
+
+It reads code from `stdin`:
+
+```
+./jitfuck < hello.bf
+```