Best Free SSL Checker
Not every free SSL checker covers the same ground. Some focus only on TLS ciphers (SSL Labs / Qualys). Others hunt mixed content (Why No Padlock). HTTPS Checker combines grade, certificate, redirects, security headers, HTTP/2/3, and mixed content in one report — in seconds, with bulk checks and a free API.
Try HTTPS Checker — no signup required.
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How popular free checkers compare
| Tool | Speed | SSL grade | Redirects | Headers | Mixed content | Bulk |
|---|---|---|---|---|---|---|
| HTTPS Checker | Seconds | |||||
| SSL Labs (Qualys) | 1–2 min | |||||
| Why No Padlock | Seconds |
SSL Labs excels at deep TLS audits — use it when you need cipher-level detail, not daily redirect and header checks.
When to use which
- HTTPS Checker — after deploys, cert renewals, or when a report shows a missing redirect, header, or mixed content issue.
- SSL Labs (Qualys) — compliance reviews and exhaustive TLS configuration testing.
- Why No Padlock — quick mixed-content-only scans (HTTPS Checker covers that plus the rest).
Deeper comparisons: