FTPS Connection Tester

Check FTPS (FTP over TLS) server connectivity and validate the TLS handshake and certificate chain in one click.

Coming Soon

This tool is under development. Download FTPie to connect to FTPS servers with full TLS support today.

Download FTPie Free

FTPS vs SFTP — what's the difference?

FTPS (FTP Secure) adds TLS encryption to the standard FTP protocol. It operates in two modes: Explicit FTPS (FTPES) starts unencrypted on port 21 and upgrades via the AUTH TLS command, while Implicit FTPS uses a dedicated TLS-only port (typically 990).

Common FTPS connection issues

  • Certificate errors — self-signed or expired TLS certificate on the server side.
  • TLS handshake failure — incompatible TLS versions between client and server.
  • Passive mode data port blocked — the firewall is not forwarding the passive data ports.
  • Wrong mode — connecting in Implicit mode to an Explicit-only port (or vice versa).