diff --git a/src/lib/formatters.ts b/src/lib/formatters.ts
new file mode 100644
index 0000000..9143bcc
--- /dev/null
+++ b/src/lib/formatters.ts
@@ -0,0 +1,30 @@
+export function formatBRL(cents: number): string {
+  return (cents / 100).toLocaleString('pt-BR', {
+    style: 'currency',
+    currency: 'BRL',
+  })
+}
+
+export function maskCPF(value: string): string {
+  const digits = value.replace(/\D/g, '').slice(0, 11)
+  return digits
+    .replace(/(\d{3})(\d)/, '$1.$2')
+    .replace(/(\d{3})(\d)/, '$1.$2')
+    .replace(/(\d{3})(\d{1,2})$/, '$1-$2')
+}
+
+export function maskPhone(value: string): string {
+  const digits = value.replace(/\D/g, '').slice(0, 11)
+  if (digits.length <= 10) {
+    return digits
+      .replace(/(\d{2})(\d)/, '($1) $2')
+      .replace(/(\d{4})(\d)/, '$1-$2')
+  }
+  return digits
+    .replace(/(\d{2})(\d)/, '($1) $2')
+    .replace(/(\d{5})(\d)/, '$1-$2')
+}
+
+export function onlyDigits(value: string): string {
+  return value.replace(/\D/g, '')
+}