Last updated: April 22, 2026
TLS 1.2 vs TLS 1.3: Which TLS Version in 2026?
Quick Answer
TLS 1.3 (2018) reduces handshake to 1-RTT (vs 2-RTT in TLS 1.2), removes weak cipher suites, and supports 0-RTT resumption. TLS 1.3 is faster and more secure. All modern browsers support it. You should require TLS 1.2 minimum and prefer TLS 1.3.
TLS 1.2 vs TLS 1.3 — Side by Side
| Feature | TLS 1.2 | TLS 1.3 |
|---|---|---|
| Handshake | 2 round-trips (2-RTT) | 1 round-trip (1-RTT), 0-RTT resumption |
| Cipher Suites | Many (some weak: CBC, RC4) | Only strong ciphers (AEAD only) |
| Forward Secrecy | Optional (depends on cipher) | Mandatory (all ciphers use ECDHE) |
| Key Exchange | RSA, DHE, ECDHE | ECDHE only (static RSA removed) |
| Performance | Slower handshake (2-RTT) | Faster: 100ms+ improvement per connection |
| Browser Support | Universal | ~95% of browsers (2026) |
Verdict
Require TLS 1.2 as your minimum version and prefer TLS 1.3. There is no reason to use TLS 1.0 or 1.1: they are deprecated. TLS 1.3 is faster and more secure with no compatibility cost for modern clients.
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