Generate OAuth 2.0 PKCE verifiers and challenges.
Generate OAuth 2.0 PKCE verifiers and challenges. This tool runs entirely in your browser using client-side APIs. Nothing you paste or upload is sent to a server.
Create and sign JWTs with HS256 or HS512.
Decode JWT headers, claims and expiry.
Build HTTP Basic authorization headers.
Generate TOTP codes from a shared secret.