Base58 Validator
Check whether a string uses valid Base58 alphabet characters and decodes without errors.
Validate Base58 strings quickly
Invalid characters are easy to miss when copying blockchain addresses or API tokens. This checker scans the alphabet, attempts a full decode, and reports how many bytes the payload represents when the string is valid.
After validation, decode the payload with the Base58 Decoder or create a new string using Base58 Encode.
Frequently Asked Questions
Does validation guarantee a meaningful message?
It only confirms that the string uses allowed characters and decodes to bytes. Semantic checks such as checksums on Bitcoin addresses are out of scope.
Which characters are rejected?
Zero, capital O, capital I, and lowercase l are not part of Base58. Any other symbol outside the 58-character alphabet is flagged immediately.
Is my input sent to a server?
No. Validation runs entirely in your browser so secrets such as wallet export strings stay on your device.
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