How is Basic Auth encoded?

Concatenate user:password, Base64-encode, send as Authorization: Basic {value}.

Is Base64 encryption?

No — encoding only. Always use HTTPS.

Some APIs need Base64url — use URL encoder tools if +/= break your header.

JWT uses Base64url for segments; Basic Auth uses standard Base64 — see our JWT debug workflow.

platform · developer

Encode username:password for HTTP Basic Auth and API headers. Safe patterns and free Base64 encoder.

Updated 2026-05-26

Preset: optimized export

How is Basic Auth encoded?: Concatenate user:password, Base64-encode, send as Authorization: Basic {value}.
Is Base64 encryption?: No — encoding only. Always use HTTPS.
URL-safe Base64?: Some APIs need Base64url — use URL encoder tools if +/= break your header.
How does this relate to JWT?: JWT uses Base64url for segments; Basic Auth uses standard Base64 — see our JWT debug workflow.