Base64 to UUID Converter

Convert Base64 bytes into a UUID only when the decoded payload is exactly 16 bytes.

Base64 or Base64URL payload

ReadyOnly payloads decoding to exactly 16 bytes are accepted.

How to use this Base64 to UUID Converter

Decode a 16-byte Base64 or Base64URL payload into canonical UUID text. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.