TLS Cipher Suite Decoder
Decode a TLS cipher suite by hex code (0x1301, 0xC02F) or name: key exchange, authentication, encryption, MAC, TLS version, forward secrecy and a security verdict — with search across the common suite list.
About TLS Cipher Suite Decoder
TLS Cipher Suite Decoder turns a cipher suite code or name — 0x1301, 0xC02F, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 — into its parts: key exchange, authentication, cipher, MAC, TLS version, forward secrecy and a plain-English security verdict.
How to use TLS Cipher Suite Decoder
- 1Paste or type your input into the box above — a sample is pre-filled so you can try it instantly.
- 2Set any options on offer (mode, key, format) to match what you need.
- 3The result appears the moment you type — no button to press, no waiting.
- 4Click Copy to grab the output — TLS Cipher Suite Decoder keeps everything on your device.
Why use TLS Cipher Suite Decoder?
- ✓Decoding the hex suite ID from a Wireshark capture or server debug log
- ✓Deciding which suites to keep when hardening an nginx/Apache/HAProxy config
- ✓Explaining to an auditor why a flagged suite is weak and what replaces it
- ✓100% free with no sign-up, no watermark and no usage limits
- ✓Runs entirely in your browser — your text and keys are never uploaded, stored or logged
- ✓Works offline once loaded, with instant results and one-click copy
Frequently asked questions
Which TLS cipher suites should a server enable in 2026?+
The three TLS 1.3 suites (0x1301–0x1303), plus the four TLS 1.2 ECDHE suites with AES-GCM or ChaCha20-Poly1305 for older clients. Everything with static RSA key exchange, CBC mode, 3DES or RC4 should be off — each suite's verdict here tells you why.
What does forward secrecy mean?+
With ephemeral key exchange (ECDHE/DHE), each session gets a throwaway key, so a future compromise of the server's private key cannot decrypt recorded past traffic. Static-RSA suites lack this — one leaked key retroactively exposes everything — which is why they were removed from TLS 1.3 entirely.
Is it free to use?+
Yes — completely free with no sign-up, no account and no usage limits. There is no paywall, so you can encode, decode and convert as much as you like.
Is my data private and secure?+
Yes. This tool runs entirely in your browser using client-side JavaScript — your input is never uploaded to a server, stored or logged. Once the page has loaded you can use it offline, which makes it safe for tokens, keys and confidential data.
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