# Free SSL / HTTPS Certificate Checker

> Paste a domain to inspect its TLS certificate: trust status, expiry countdown, issuer, subject, and SAN list - no signup.

```yaml
url: "https://www.scrolllaunch.com/tools/ssl-checker"
slug: ssl-checker
category: onpage
keywords: "ssl checker, ssl certificate checker, https certificate checker, ssl expiry checker, tls checker, free ssl checker"
```

## How to use

1. **Enter a domain** - Paste example.com - we connect on port 443 with SNI.
2. **Review the cert** - Check authorised status, expiry days, issuer, and SAN coverage.
3. **Renew early** - Aim to renew before the 14-day warning window, then re-check.

## SSL checks before you submit directories

Browsers warn on expired or mismatched certificates - fix HTTPS before launch week outreach.

Confirm SANs include both apex and www if you serve both hostnames.

After DNS changes, re-check SSL and HTTP headers (HSTS) together.

## What you get

- Certificate validity & trust
- Days until expiry
- Issuer + subject
- Subject Alternative Names

## Related tools

- **[HTTP Header Checker](https://www.scrolllaunch.com/tools/http-header-checker)** - Free HTTP header checker - inspect status, security headers, caching, and X-Robots-Tag.
- **[DNS Lookup](https://www.scrolllaunch.com/tools/dns-lookup)** - Free DNS lookup - A, AAAA, CNAME, MX, NS, TXT, and SOA records for any domain.
- **[Redirect Checker](https://www.scrolllaunch.com/tools/redirect-checker)** - Free redirect checker - trace 301/302/307/308 chains, meta refresh, and the final landing URL.
- **[Canonical URL Checker](https://www.scrolllaunch.com/tools/canonical-url-checker)** - Free canonical URL checker - verify <link rel="canonical"> matches the final URL.

## Related

- [All tools](https://www.scrolllaunch.com/tools)
- [Pricing](https://www.scrolllaunch.com/pricing) - launch free; dofollow while the badge stays on your site.
- [Directories](https://www.scrolllaunch.com/directories) - curated startup directories ranked by DR.