What SSL certificate formats does this toolkit support?

The SSL Toolkit supports PEM (Base64 text), DER (binary), PKCS#7/P7B (certificate chains), and PKCS#12/PFX (certificates with private keys). You can convert between formats using the Format Converter tool.

Is it safe to paste my private key into this tool?

Yes! All processing happens entirely in your browser using JavaScript. Your private keys and certificates are never sent to any server. The only exception is the Website SSL Checker, which fetches public certificate data from websites.

What key algorithms are supported for key generation?

The toolkit supports RSA keys (2048, 3072, and 4096 bit), as well as ECDSA keys with P-256, P-384, and P-521 curves. You can also encrypt private keys with a password using PKCS#8 encryption.

How do I check if my certificate matches my private key?

Use the Certificate-Key Matcher tool. Paste both your certificate and private key, and the tool will verify they form a matching pair by comparing their public key components.

Can I check the SSL configuration of any website?

Yes! The Website SSL Checker tool lets you enter any domain name and analyzes its SSL certificate, certificate chain, supported TLS versions, cipher suites, HSTS configuration, and more.

Free Online SSL Toolkit (No Signup)

Free Online SSL Toolkit (No Signup) – FreeWWW

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