All tools · 🌐 Network Tools
🔒 TLS / SSL Versions Reference
SSL 2.0 was released in 1995. TLS 1.3 came out in 2018. Between them, six protocol versions and several major vulnerabilities. This reference tells you which versions are still safe to use (1.2 and 1.3 only), which are deprecated, and what each version added.
Loading tool…
Examples
Status
Output
SSL 2.0 (1995, broken) · SSL 3.0 (1996, POODLE) · TLS 1.0 (1999, deprecated 2020) · TLS 1.1 (2006, deprecated 2020) · TLS 1.2 (2008, current) · TLS 1.3 (2018, current)Frequently asked questions
Should I disable TLS 1.2?
Not yet. TLS 1.2 is still widely supported and secure with modern cipher suites. Many older clients (older Android, Java versions) do not support TLS 1.3.
About this calculator
TLS / SSL Versions Reference runs entirely in your browser using standard formulas. No data is sent to any server. We don't share your inputs with lenders, brokers, or anyone else — there's no funnel and no follow-up email.
Related tools
- 🔐 TLS Cipher Suites Reference — Common TLS cipher suites — what they mean and which are safe.
- 📑 Networking RFC Reference — Important networking RFCs by number and topic.
Why this tool
vs typical free network-tools sites
| NetToolset | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for advanced features) |
| Ads inside the tool | No | Yes (banner + interstitial) |
| Logs your IP / queries | No | Yes (often resold) |
| Data sent to a server | Math runs in browser; lookups hit Cloudflare DoH directly | Yes (all goes through their server) |
| Open source | Yes | No |
| Bookmarkable URL per tool | Yes | Mixed |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |