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ASN.1 Parser

Parse and analyze ASN.1 DER/BER structures with RFC definition matching
Input (Hex, Base64, or PEM):
Structure Definition:

📖 How to Use ASN.1 Parser

• Paste your ASN.1 encoded data in hexadecimal, Base64, or PEM format into the input field.
• Click "Parse" to decode the structure and view the hierarchical tree representation.
• Enable "with hex dump" to see the raw bytes alongside the parsed structure.
• Use "with definitions" to match the structure against known RFC definitions like X.509, PKCS, etc.

ASN.1 Parser FAQ