diff --git a/package.json b/package.json
index d124e68..8dfb880 100644
--- a/package.json
+++ b/package.json
@@ -16,9 +16,9 @@
   "scripts": {
     "test": "./scripts/test",
     "build": "./scripts/build",
+    "build:browser": "./scripts/build-browser.sh",
     "prepublishOnly": "echo 'to publish, run yarn build && (cd dist; yarn publish)' && exit 1",
     "format": "./scripts/format",
-    "prepare": "if ./scripts/utils/check-is-in-git-install.sh; then ./scripts/build && ./scripts/utils/git-swap.sh; fi",
     "tsn": "ts-node -r tsconfig-paths/register",
     "lint": "./scripts/lint",
     "fix": "./scripts/format"
@@ -29,11 +29,11 @@
     "@swc/core": "^1.3.102",
     "@swc/jest": "^0.2.29",
     "@types/jest": "^29.4.0",
-    "@types/ws": "^8.5.13",
     "@types/node": "^20.17.6",
-    "typescript-eslint": "8.31.1",
+    "@types/ws": "^8.5.13",
     "@typescript-eslint/eslint-plugin": "8.31.1",
     "@typescript-eslint/parser": "8.31.1",
+    "esbuild": "^0.25.5",
     "eslint": "^9.20.1",
     "eslint-plugin-prettier": "^5.4.1",
     "eslint-plugin-unused-imports": "^4.1.4",
@@ -48,6 +48,7 @@
     "tsc-multi": "https://github.com/stainless-api/tsc-multi/releases/download/v1.1.8/tsc-multi.tgz",
     "tsconfig-paths": "^4.0.0",
     "typescript": "5.8.3",
+    "typescript-eslint": "8.31.1",
     "ws": "^8.18.0",
     "zod": "^3.23.8"
   },
diff --git a/scripts/build-browser.sh b/scripts/build-browser.sh
new file mode 100755
index 0000000..aeca43e
--- /dev/null
+++ b/scripts/build-browser.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -exuo pipefail
+
+# Base directory
+cd "$(dirname "$0")/.."
+
+# Input: dist/index.mjs is the ESM build from `tsc-multi`
+INPUT="dist/index.mjs"
+
+# Output (ESM)
+esbuild "$INPUT" \
+  --bundle \
+  --platform=browser \
+  --target=es2020 \
+  --format=esm \
+  --outfile=dist/openai-dev.mjs
+
+# Minified version
+esbuild "$INPUT" \
+  --bundle \
+  --platform=browser \
+  --target=es2020 \
+  --format=esm \
+  --minify \
+  --outfile=dist/openai.mjs