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c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Long: tlsv1.3 Help: Use TLSv1.3 or greater Protocols: TLS Added: 7.52.0 Category: tls Multi: mutex See-also:

• tlsv1.2
• tls-max Example:
• --tlsv1.3 $URL

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--tlsv1.3

Forces curl to use TLS version 1.3 or later when connecting to a remote TLS server.

If the connection is done without TLS, this option has no effect. This includes QUIC-using (HTTP/3) transfers.

Note that TLS 1.3 is not supported by all TLS backends.