16進数 ↔ Base64
16進数とBase64を相互変換。暗号ハッシュ、証明書、バイナリデータの処理に便利。
Frequently Asked Questions
What is the difference between hex and Base64?
Hex uses 16 characters (0-9, A-F) and doubles the data size. Base64 uses 64 characters and adds only 33% overhead, making it more compact for the same data.
When would I convert hex to Base64?
When working with cryptographic hashes (like SHA-256), SSL certificates, or binary data that is currently displayed in hexadecimal format.
Does the conversion change the underlying data?
No. Both hex and Base64 are text representations of the same binary bytes. Converting between them does not alter the data.
Should hex output be uppercase or lowercase?
Convention varies. Cryptographic hashes typically use lowercase, while certificates and some network protocols use uppercase. This tool supports both.