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mkcert Web UI

Manage SSL certificates with mkcert CLI

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Root Certificate Authority

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Generate New Certificate

Domains (one per line): Enter domain names, IP addresses, or wildcards. One per line.

Certificate Format: PEM (.pem / -key.pem) CRT/KEY (.crt / .key) P12/PFX (.p12) - PKCS#12 Bundle P12 Client (.p12) - S/MIME / Client Auth PEM/CRT for servers, P12 for browsers/email. P12 Client includes client authentication flag for S/MIME.

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Upload Certificate Files

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or click to select files

Supported: .pem, .crt, .key, .cer files

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Notifications & Monitoring

Email Notifications

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Send Test Email Verify SMTP

Certificate Monitoring

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Expiring Certificates

Configure email and monitoring settings in the Settings page

Existing Certificates

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