diff --git a/src/utils/blobRefToSrc.ts b/src/utils/blobRefToSrc.ts
new file mode 100644
index 00000000..2f09f2c4
--- /dev/null
+++ b/src/utils/blobRefToSrc.ts
@@ -0,0 +1,4 @@
+import { BlobRef } from "@atproto/lexicon";
+
+export const blobRefToSrc = (b: BlobRef["ref"], did: string) =>
+  `/api/atproto_images?did=${did}&cid=${(b as unknown as { $link: string })["$link"]}`;