TLS Studio A DNS Studio tool
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TLS Version Comparator

Compare TLS versions side-by-side. Understand the differences, security implications, and when to use each version.

TLS 1.3

Released: 2018

Current
Security
Excellent
Performance
Excellent
Browser support
Excellent (2018+)

Key features

  • 1-RTT handshake (0-RTT optional)
  • Perfect Forward Secrecy mandatory
  • AEAD ciphers only
  • Removed insecure features
  • Improved security

TLS 1.2

Released: 2008

Widely Supported
Security
Good (with proper config)
Performance
Good
Browser support
Universal

Key features

  • 2-RTT handshake
  • Forward Secrecy optional
  • AEAD and legacy ciphers
  • More flexible
  • Mature and stable

TLS 1.1

Released: 2006

Deprecated
Security
Poor
Performance
Fair
Browser support
Deprecated

Key features

  • 2-RTT handshake
  • Legacy ciphers
  • Vulnerable to attacks
  • No longer recommended

TLS 1.0

Released: 1999

Deprecated
Security
Very Poor
Performance
Fair
Browser support
Deprecated

Key features

  • 2-RTT handshake
  • Very old ciphers
  • Known vulnerabilities
  • Should not be used

Recommendations

  • ✓ Use TLS 1.3 for new deployments — it offers the best security and performance.
  • ✓ Support TLS 1.2 for compatibility with older clients.
  • ✗ Disable TLS 1.0 and 1.1 — they are deprecated and insecure.

Related tools

Watch each version negotiate a connection in the visual TLS handshake, and learn what a cipher suite actually selects in Cipher suites.