Free SSL Certificate Tools

🔍

SSL Checker

Instantly verify SSL certificate installation, check expiration dates, validate certificate chains, and diagnose SSL errors.

⚙️

CSR Generator

Generate a secure Certificate Signing Request (CSR) and Private Key directly in your browser. Supports 2048-bit and 4096-bit keys.

🔄

SSL Converter

Convert SSL files between standard formats: PEM, DER, PFX/PKCS#12, and P7B. Essential for migrating certificates between servers.

📜

CSR Decoder

Decode and verify Certificate Signing Requests (CSR). View all details including Common Name, Organization, and key information.

🔓

Certificate Decoder

Decode X.509 SSL certificates to view issuer, validity period, subject alternative names, and all certificate details.

🔑

Certificate Key Matcher

Verify that your private key matches your SSL certificate or CSR. Prevent installation errors before they happen.

📚

Bulk SSL Checker

Monitor SSL health for multiple domains at once. Bulk check expiration dates, issuer status, and validity for up to 100 domains.

🛡️

TLS Security Scanner

Test which protocols your server accepts and flag weak ones (SSLv3/POODLE, TLS 1.0, TLS 1.1). Get an A+ to F security grade.

🌐

DNS & Bulk DNS Lookup

Check DNS records (A, MX, TXT, etc.) for any domain or process hundreds of lookups at once with our professional Bulk DNS Tool.

🌍

Certificate Search

Search Certificate Transparency logs to find all SSL/TLS certificates issued for any domain. Discover subdomains and audit history.

📧

SMTP/IMAP SSL Checker

Test SSL/TLS security on mail servers. Support for SMTP (587/465), IMAP (993), and POP3. Verify STARTTLS and certificate validity.

⛓️

Redirect Checker

Trace the full path of any URL redirect. Identify status codes (301, 302, 307, 308) and analyze server response headers.

🛡️

Vulnerability Checker

Perform a security audit of your website. Check security headers, sensitive file exposure, and SSL/TLS flaws.