VaulTLS is an open-source tool designed to streamline the integration of HashiCorp Vault with applications by providing a simple and secure way to handle TLS (Transport Layer Security) certificates. It automates the fetching, renewal, and management of TLS certificates from Vault, enabling seamless and secure communication for modern services without manual certificate handling. By acting as a local proxy or sidecar, VaulTLS ensures applications always have up-to-date, Vault-issued certificates, enhancing security and simplifying operations in dynamic and containerized environments.