diff --git a/packages/util/src/Pubkey.ts b/packages/util/src/Pubkey.ts
new file mode 100644
index 0000000..c19a9fc
--- /dev/null
+++ b/packages/util/src/Pubkey.ts
@@ -0,0 +1,33 @@
+import {decode, npubEncode, nprofileEncode} from "nostr-tools/nip19"
+
+export class Pubkey {
+  constructor(
+    readonly pubkey: string,
+    readonly relays: string[] = [],
+  ) {}
+
+  static from(entity: string, relays: string[] = []) {
+    let pubkey: string
+    if (entity.match(/^[0-9a-f]{64}$/)) {
+      pubkey = entity
+    } else {
+      const {type, data} = decode(entity) as any
+
+      if (type === "npub") {
+        pubkey = data
+      } else if (type === "nprofile") {
+        pubkey = data.pubkey
+      } else {
+        throw new Error(`Invalid pubkey: ${entity}`)
+      }
+    }
+
+    return new Pubkey(pubkey, relays)
+  }
+
+  toString = () => this.pubkey
+
+  toNpub = () => npubEncode(this.pubkey)
+
+  toNprofile = () => nprofileEncode(this)
+}