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PEM Decoder

Decode and display X.509 certificate

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Decode X.509 Certificates Instantly

The PEM Decoder provides a straightforward way to transform raw PEM-encoded text into readable information. By pasting your certificate into the tool, it automatically detects and decodes X.509 certificates, displaying critical details such as issuer data, subject information, and public keys. This simplifies the process for developers and system administrators who need to verify certificate metadata or check validity dates without using complex command-line tools or manual decoding processes.

Secure Local Processing

Security is a primary concern when handling cryptographic certificates and private keys. The PEM Decoder operates entirely within your web browser, meaning no data is ever sent to an external server. By processing the information locally on your machine, the tool ensures that sensitive certificate details remain private. This makes it a safe and reliable choice for inspecting security credentials while maintaining full control over your sensitive information.

Frequently asked questions

What can the PEM Decoder do?

The tool decodes and analyzes PEM certificates and keys. It specifically processes X.509 certificates to display human-readable data, such as validity periods and issuer details, making it easier to verify that your security credentials are correctly configured and currently active.

Is my certificate safe when I paste it?

Yes, because the tool processes all information locally in your browser. No data is uploaded or transmitted to any external servers during the decoding process. This ensures that your sensitive cryptographic keys and certificates remain private and secure at all times.

What information is revealed after decoding?

After decoding a PEM file, you can view essential X.509 certificate details including the issuer, subject name, public key information, and specific dates such as when the certificate becomes valid and when it expires to help manage your security certificates effectively.