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Base64URL Decoder

Validate URL-safe Base64, restore canonical byte groups, and decode UTF-8 without sending data to a server.

ReadyAccepts URL-safe Base64 with or without padding. Binary payloads belong in Base64 to File rather than this text decoder.

How to use this Base64URL Decoder

Decode Base64URL with or without padding back to strict UTF-8 text locally. 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.