diff --git a/.github/workflows/aws_tfhe_wasm_tests.yml b/.github/workflows/aws_tfhe_wasm_tests.yml
index f863366754..0404ad2213 100644
--- a/.github/workflows/aws_tfhe_wasm_tests.yml
+++ b/.github/workflows/aws_tfhe_wasm_tests.yml
@@ -57,13 +57,20 @@ jobs:
         with:
           toolchain: stable
 
+      - name: Install Node
+        run: |
+          make install_node
+
+      - name: Run fmt checks
+        run: |
+          make check_fmt_js
+
       - name: Run js on wasm API tests
         run: |
           make test_nodejs_wasm_api_in_docker
 
       - name: Run parallel wasm tests
         run: |
-          make install_node
           make ci_test_web_js_api_parallel
 
       - name: Slack Notification
diff --git a/Makefile b/Makefile
index 461b8e64e6..717198bb75 100644
--- a/Makefile
+++ b/Makefile
@@ -149,10 +149,22 @@ check_actionlint_installed:
 	@actionlint --version > /dev/null 2>&1 || \
 	( echo "Unable to locate actionlint. Try installing it: https://github.com/rhysd/actionlint/releases" && exit 1 )
 
+.PHONY: check_nvm_installed # Check if Node Version Manager is installed
+check_nvm_installed:
+	@source ~/.nvm/nvm.sh && nvm --version > /dev/null 2>&1 || \
+	( echo "Unable to locate Node. Run 'make install_node'" && exit 1 )
+
 .PHONY: fmt # Format rust code
 fmt: install_rs_check_toolchain
 	cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" fmt
 
+.PHONY: fmt_js # Format javascript code
+fmt_js: check_nvm_installed
+	source ~/.nvm/nvm.sh && \
+	nvm install $(NODE_VERSION) && \
+	nvm use $(NODE_VERSION) && \
+	$(MAKE) -C tfhe/web_wasm_parallel_tests fmt
+
 .PHONY: fmt_gpu # Format rust and cuda code
 fmt_gpu: install_rs_check_toolchain
 	cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" fmt
@@ -167,6 +179,13 @@ check_fmt_gpu: install_rs_check_toolchain
 	cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" fmt --check
 	cd "$(TFHECUDA_SRC)" && ./format_tfhe_cuda_backend.sh -c
 
+.PHONY: check_fmt_js # Check javascript code format
+check_fmt_js: check_nvm_installed
+	source ~/.nvm/nvm.sh && \
+	nvm install $(NODE_VERSION) && \
+	nvm use $(NODE_VERSION) && \
+	$(MAKE) -C tfhe/web_wasm_parallel_tests check_fmt
+
 .PHONY: clippy_gpu # Run clippy lints on tfhe with "gpu" enabled
 clippy_gpu: install_rs_check_toolchain
 	RUSTFLAGS="$(RUSTFLAGS)" cargo "$(CARGO_RS_CHECK_TOOLCHAIN)" clippy \
diff --git a/tfhe/web_wasm_parallel_tests/.prettierignore b/tfhe/web_wasm_parallel_tests/.prettierignore
new file mode 100644
index 0000000000..a3797fd203
--- /dev/null
+++ b/tfhe/web_wasm_parallel_tests/.prettierignore
@@ -0,0 +1,4 @@
+dist/
+node_modules/
+pkg/
+test/benchmark_results/
diff --git a/tfhe/web_wasm_parallel_tests/Makefile b/tfhe/web_wasm_parallel_tests/Makefile
index 03d2c47ae6..f11091885f 100644
--- a/tfhe/web_wasm_parallel_tests/Makefile
+++ b/tfhe/web_wasm_parallel_tests/Makefile
@@ -23,3 +23,13 @@ bench: run_server
 
 .PHONY: bench-ci # Run benchmarks on web client in CI
 bench-ci: run_server
+
+.PHONY: fmt # Format Javascript code
+fmt:
+	npm install
+	npm run format
+
+.PHONY: fmt # Check Javascript code format
+check_fmt:
+	npm install
+	npm run check-format
diff --git a/tfhe/web_wasm_parallel_tests/package-lock.json b/tfhe/web_wasm_parallel_tests/package-lock.json
index 9772a9468f..66a1ecc1b4 100644
--- a/tfhe/web_wasm_parallel_tests/package-lock.json
+++ b/tfhe/web_wasm_parallel_tests/package-lock.json
@@ -15,6 +15,7 @@
       "devDependencies": {
         "@babel/preset-env": "^7.22.4",
         "jest": "^29.5.0",
+        "prettier": "^3.2.5",
         "puppeteer": "^21.3.8",
         "serve": "^14.2.0",
         "webpack": "^5.75.0",
@@ -7299,6 +7300,21 @@
         "node": ">=8"
       }
     },
+    "node_modules/prettier": {
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.2.5.tgz",
+      "integrity": "sha512-3/GWa9aOC0YeD7LUfvOG2NiDyhOWRvt1k+rcKhOuYnMY24iiCphgneUfJDyFXd6rZCAnuLBv6UeAULtrhT/F4A==",
+      "dev": true,
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    },
     "node_modules/pretty-format": {
       "version": "29.7.0",
       "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-29.7.0.tgz",
diff --git a/tfhe/web_wasm_parallel_tests/package.json b/tfhe/web_wasm_parallel_tests/package.json
index ee1eab90e1..76831479bb 100644
--- a/tfhe/web_wasm_parallel_tests/package.json
+++ b/tfhe/web_wasm_parallel_tests/package.json
@@ -10,13 +10,16 @@
     "server": "serve --config ../serve.json dist/",
     "test-separate-processes": "jest --listTests | xargs -L 1 jest --runInBand --testNamePattern=Test",
     "bench-separate-processes": "jest --listTests | xargs -L 1 jest --runInBand --testNamePattern=Bench",
-    "test2": "mocha"
+    "test2": "mocha",
+    "format": "prettier . --write",
+    "check-format": "prettier . --check"
   },
   "author": "",
   "license": "ISC",
   "devDependencies": {
     "@babel/preset-env": "^7.22.4",
     "jest": "^29.5.0",
+    "prettier": "^3.2.5",
     "puppeteer": "^21.3.8",
     "serve": "^14.2.0",
     "webpack": "^5.75.0",