So nutzt du: PKCE Generator
- A code verifier and its S256 challenge are generated right away; click Generate new for another pair, or paste your own verifier to see its challenge.
- Fill in your provider’s authorization and token endpoints,
client_id,redirect_uriandscope. - Open the authorization URL, sign in, and copy the
codefrom the redirect. - Run the token request (curl) with that code — the verifier proves you started the login.
How PKCE protects the login
PKCE (Proof Key for Code Exchange, RFC 7636) stops a stolen authorization code from being used by anyone else. The app creates a random secret — the code verifier — and sends only its hash, the code challenge, with the login request. When it exchanges the returned code for tokens, it sends the verifier itself; the server hashes it and checks that it matches. An attacker who intercepts the code doesn’t have the verifier.
- The verifier is 43–128 characters from
A–Z a–z 0–9 - . _ ~. - S256:
code_challenge = BASE64URL(SHA256(code_verifier)), without padding. - OAuth 2.1 requires PKCE for every client, including server-side apps — not just mobile and single-page apps.
stateprotects against CSRF;nonceties an OpenID Connect ID token to this login.
Decode the tokens you get back with the JWT Decoder, or try the token call in the API Tester.
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Passende Tools zu: PKCE Generator
- JWT Encoder — Build a JWT for testing APIs: edit the payload, add standard claims with one click and sign it with an HMAC secret or an RSA / EC private key.
- Hash Generator — Compute MD5 and SHA hashes of any text or file instantly, create HMAC signatures, and paste an expected checksum to verify a download.
- Base64-Kodierung / -Dekodierung — Konvertiere Text in Base64 und zurück – mit vollständiger UTF-8-Unterstützung (Akzente, Emojis), wechsle zu URL-sicheren Base64-Werten oder zieh eine Datei per Drag & Drop hinein, um deren Base64-Zeichenkette oder Daten-URI zu erhalten.
- Passwortgenerator — Erstelle sichere, wirklich zufällige Passwörter oder leicht einzutippende Passphrasen – mit erweiterten Regeln: Wörter ein- oder ausschließen, Zeichen vorschreiben, zulässige Symbole auswählen, Wiederholungen und Sequenzen vermeiden.