diff --git a/features/uint8array-base64-hex.yml b/features/uint8array-base64-hex.yml
new file mode 100644
index 00000000000..293fe95d212
--- /dev/null
+++ b/features/uint8array-base64-hex.yml
@@ -0,0 +1,12 @@
+name: Uint8Array base64 and hex conversion
+description: The `Uint8Array` object methods `fromBase64()`, `toBase64()`, and `setFromBase64()` convert to and from base64 strings. The `fromHex()`, `toHex()`, and `setFromHex()` methods convert to and from hex strings.
+spec: https://tc39.es/proposal-arraybuffer-base64/spec/
+group:
+  - typed-arrays
+compat_features:
+  - javascript.builtins.Uint8Array.fromBase64
+  - javascript.builtins.Uint8Array.fromHex
+  - javascript.builtins.Uint8Array.setFromBase64
+  - javascript.builtins.Uint8Array.setFromHex
+  - javascript.builtins.Uint8Array.toBase64
+  - javascript.builtins.Uint8Array.toHex
diff --git a/features/uint8array-base64-hex.yml.dist b/features/uint8array-base64-hex.yml.dist
new file mode 100644
index 00000000000..370a146e32f
--- /dev/null
+++ b/features/uint8array-base64-hex.yml.dist
@@ -0,0 +1,13 @@
+# Generated from: uint8array-base64-hex.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support: {}
+compat_features:
+  - javascript.builtins.Uint8Array.fromBase64
+  - javascript.builtins.Uint8Array.fromHex
+  - javascript.builtins.Uint8Array.setFromBase64
+  - javascript.builtins.Uint8Array.setFromHex
+  - javascript.builtins.Uint8Array.toBase64
+  - javascript.builtins.Uint8Array.toHex