diff --git a/.githooks/pre-commit b/.githooks/pre-commit
index 64502afd..9696481b 100755
--- a/.githooks/pre-commit
+++ b/.githooks/pre-commit
@@ -9,15 +9,33 @@ require 'rubygems'
 require 'bundler/setup'
 require_relative '../utils/devtool/copyright'
 
-source_files_exts = ['.S', '.rs', '.rb']
+def copyright_check(staged_files)
+    source_files_exts = ['.S', '.rs', '.rb']
 
-staged_files = `git --no-pager diff --name-only --cached --diff-filter=d`.split(/\n/)
-staged_files.select! do |f|
-    next if f.include?('build.rs')
+    staged_files = staged_files.select do |f|
+        next if f.include?('build.rs')
+
+        f.include?('Makefile') ||
+            f.include?('Dockerfile') ||
+            source_files_exts.include?(File.extname(f))
+    end
+    return true if staged_files.empty?
 
-    f.include?('Makefile') ||
-        f.include?('Dockerfile') ||
-        source_files_exts.include?(File.extname(f))
+    copyright_check_files(staged_files)
 end
 
-exit(1) unless copyright_check_files(staged_files)
+##--------------------------------------------------------------------------------------------------
+## Execution starts here
+##--------------------------------------------------------------------------------------------------
+staged_files = `git --no-pager diff --name-only --cached --diff-filter=d`.split(/\n/)
+root_dir = `git rev-parse --show-toplevel`.strip
+
+# Copyright must be fixed manually.
+exit(1) unless copyright_check(staged_files)
+
+# Brute-force format. Don't care if it affects non-staged files as well, since we only add back the
+# staged ones.
+Dir.chdir(root_dir) { system('ruby utils/devtool.rb fmt') }
+
+staged_files.each { |f| system("git add #{f}") }
+exit(0)
diff --git a/utils/devtool.rb b/utils/devtool.rb
index 73579922..9a4952ca 100755
--- a/utils/devtool.rb
+++ b/utils/devtool.rb
@@ -41,8 +41,8 @@ class TutorialCrate
         Dir.chdir(@folder) { exit(1) unless system("BSP=#{bsp} make clippy") }
     end
 
-    def fmt(args)
-        print 'Format '.light_blue
+    def fmt_cargo_rust(args)
+        print 'Rust cargo fmt '.light_blue
         print "#{args} ".light_blue unless args.nil?
         puts @folder
 
@@ -86,6 +86,7 @@ end
 # Forks commands to all applicable receivers
 class DevTool
     def initialize
+        @user_has_supplied_crates = false
         @bsp = bsp_from_env || SUPPORTED_BSPS.first
 
         cl = user_supplied_crate_list || Dir['*/Cargo.toml'].sort
@@ -120,14 +121,16 @@ class DevTool
         end
     end
 
-    def fmt(check: false)
-        args = '-- --check' if check
-
-        @crates.each { |c| c.fmt(args) }
+    def fmt
+        fmt_cargo_rust(check: false)
+        puts
+        fmt_prettier(check: false)
     end
 
     def fmt_check
-        fmt(check: true)
+        fmt_cargo_rust(check: true)
+        puts
+        fmt_prettier(check: true)
     end
 
     def make(bsp = nil)
@@ -166,7 +169,7 @@ class DevTool
 
     def rubocop
         puts 'Rubocop'.light_blue
-        exit(1) unless system('rubocop')
+        exit(1) unless system('bundle exec rubocop')
     end
 
     def ready_for_publish
@@ -177,6 +180,7 @@ class DevTool
         clippy('rpi4')
         clippy('rpi3')
         copyright
+        diff
 
         clean
         make('rpi4')
@@ -184,7 +188,6 @@ class DevTool
         make_xtra
         test_unit
         test_integration
-        diff
         clean
     end
 
@@ -209,6 +212,29 @@ class DevTool
         nil
     end
 
+    def fmt_cargo_rust(check: false)
+        args = '-- --check' if check
+
+        @crates.each { |c| c.fmt_cargo_rust(args) }
+    end
+
+    def fmt_prettier(check: false)
+        args = if check
+                   '--check'
+               else
+                   '--write'
+               end
+
+        args += if @user_has_supplied_crates
+                    " #{@crates.map(&:folder).join(' ')}"
+                else
+                    ' .'
+                end
+
+        puts 'Prettier:'.light_blue
+        exit(1) unless system("./node_modules/.bin/prettier #{args}")
+    end
+
     def user_supplied_crate_list
         folders = ARGV.drop(1)