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Base64URL Encoder

Create Base64URL locally with - and _ characters and optional padding; padding is omitted by default.

ReadyUses the RFC 4648 URL- and filename-safe alphabet (- and _). Padding is optional for Base64URL and is omitted by default here.

How to use this Base64URL Encoder

Encode UTF-8 text with the RFC 4648 URL- and filename-safe Base64 alphabet. 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.