How long is the free SSL certificate valid for?

The free TLS/SSL certificates issued through automated authorities (like Let's Encrypt) are valid for 90 days. You can re-verify and renew your certificate for free at any time before expiration.

Does this tool support wildcard certificates?

Yes, CertificateHub supports wildcard certificates (e.g., *.yourdomain.com). Please note that wildcard domain applications require DNS verification to prove ownership.

Is my private key safe during the application process?

We strictly adherence to a zero-storage, zero-logging policy. Your private keys and certificate assets are processed solely in temporary memory and are completely and permanently destroyed as soon as the session ends.

Get Your Free TLS/SSL Certificate Instantly

Free automated SSL certificate generation with HTTP or DNS verification. Secure your domain in minutes with zero configuration.

Enter Your Domain(e.g., example.com or *.example.com)

Verification Method

DNS Verification

Ideal for wildcard certificates. Requires adding a TXT record in your domain's DNS settings (Wait a few minutes for DNS to propagate to avoid failure).

HTTP Verification

Ideal for single domains. Requires uploading a verification file to your server's root directory.

Ownership Verification

Please complete the following configuration to ensure our verification server can identify your identity.

Certificate Issued Successfully

Your certificate is ready. Please save your private key securely; we do not store any private key data.

Public Key (CERTIFICATE)

Private Key (PRIVATE KEY)

Reference Steps | For the complete process, please refer to the Help documentation

Step 1 Configure Target Domains: Input the domains you wish to secure. Supports multi-domain and wildcard (泛域名) batch applications.

Step 2 Complete Ownership Challenge: Flexibly choose between HTTP file routing verification or serverless DNS TXT record verification.

Step 3 Issue & Deploy: Securely generate your private key pair and instantly download your production-ready, fully compliant certificate.

Post-Issuance Operations FAQ

Q: How can I verify that the free certificate I just downloaded is secure and valid?

A: This platform utilizes the ACME protocol to make real-time issuance requests to the globally trusted Certificate Authority (Let's Encrypt). The generated certificates strictly adhere to international web cryptographic standards. After downloading, you can import your certificate into our Online Certificate Decoder for an in-depth review. The parsing engine will extract the serial number, cryptographic strength, public key length, and precise expiration alerts to ensure your digital asset is pristine and correct.

Q: What should I do if the Web server prompts a key mismatch error during deployment?

A: When managing multiple domains or frequently renewing certificates, it is extremely common for administrators to make the mistake of "matching a private key from Domain A with a certificate from Domain B." To avoid service downtime, do not attempt to force deployment. Instead, simply paste your certificate and private key text into our SSL Certificate Matcher & Verifier. By comparing the Modulus hashes of both files, it determines the true pair ownership in under a second.

Verifying Domain