How does Base64URL differ from standard Base64?

Base64URL replaces + and / with - and _ and omits trailing = padding so tokens work safely in URLs.

Where is Base64URL used?

It is required by JWT tokens, OAuth2 PKCE challenges, and WebAuthn payloads.

100% Client-Side • Zero Data Leaves Browser

Encode text into URL- and filename-safe Base64URL format (replacing + with -, / with _, and stripping = padding).

Active Converter / Utility

Input Data Upload File

Output Result