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使い方

  1. Paste your Base64 encoded string from certutil output or environment variable
  2. Click "Decode" to convert the Base64 content to readable text or binary
  3. View the decoded certificate details, PEM structure, or text content
  4. Copy the decoded output or download it as a file

ユースケース

  • Decoding Base64 certificates from Windows certutil command output
  • Converting environment variable Base64 values back to original format
  • Decoding PEM-encoded certificates and keys from Base64
  • Troubleshooting certificate encoding issues in CI/CD pipelines

よくある質問

What is certutil Base64 decoding?
Certutil is a Windows command-line tool that can encode and decode Base64 data. This online tool replicates the decode functionality without needing Windows or command-line access.
Can I decode Base64 from environment variables?
Yes! Simply paste the Base64 string stored in your environment variable and decode it instantly. This is common in CI/CD pipelines where certificates are stored as Base64 environment variables.
Is this tool safe for decoding certificates?
Absolutely. All decoding happens locally in your browser. No data is sent to any server, making it safe for sensitive certificate data.