OAuth2 Authorize URL Builder
OAuth2 Authorize URL Builder: Assembles standard RFC 6749 query parameters, adds response_type=code and random state anti-CSRF token.
About this oauth2 authorize url builder
Assembles standard RFC 6749 query parameters, adds response_type=code and random state anti-CSRF token Validates and converts interface schemas client-side without transmitting private endpoint specifications.
API contract & interface schema logic
Builds an OAuth authorization URL from JSON options. When state is absent, Web Crypto generates a fresh 128-bit URL-safe value; a supplied state is used unchanged.
Worked schema conversion scenario
Scenario: A developer builds an OAuth 2.0 authorization URL using a supplied state value.
Sample input:
Processing: Assembles the authorization query with response_type=code and the supplied state; no PKCE challenge is present in this example.
Illustrative output:
Schema version & syntax constraints
This creates URL text only. The relying client must store state and compare it with the callback value; random generation on this page alone does not provide CSRF protection. It does not complete login or validate provider metadata.
API specifications and schema models in OAuth2 Authorize URL Builder reflect OpenAPI and JSON Schema standards. Verify generated schemas against your runtime validator.
Client-side schema processing boundary
Schema analysis and protocol mapping in OAuth2 Authorize URL Builder execute locally in the browser tab without uploading endpoint definitions.
OpenAPI Specification & JSON Schema standards
OpenAPI Specification standards and JSON Schema draft definitions:
- RFC 6749 (The OAuth 2.0 Authorization Framework)
- RFC 7636 (Proof Key for Code Exchange by OAuth Public Clients - PKCE)
OAuth2 Authorize URL Builder verification · Audit standards
How to use it
- Enter JSON with an authorization_endpoint and optional client_id, redirect_uri, scope, state, and code_challenge.
- Require HTTPS except for localhost, add default query values, and generate a random state only when none is supplied.
- Return the URL text with preserved endpoint query parameters and optional S256 code challenge.
Frequently asked questions
How does OAuth 2 Authorization URL Builder construct a URL?+
It parses authorization_endpoint or a default HTTPS endpoint, requires HTTPS except localhost, sets response_type, client_id, redirect_uri and scope defaults, and uses a supplied state or generates a fresh random 128-bit URL-safe state. It adds code_challenge with S256 when supplied.
Can you show an input and its result?+
An HTTPS endpoint with tenant=a, spaced client and state values, redirect URI, openid profile scope and abc-_ challenge retained tenant and encoded the expected response_type, client_id, redirect_uri, scope, state, challenge and S256 method.
Which OAuth controls are absent?+
The page does not discover metadata, validate registered redirect URIs, choose response modes, add nonce, prompt, audience or provider-specific parameters, sign requests, perform PAR, or verify client configuration.
Does a generated URL prove it is safe to open?+
No. It only checks the endpoint scheme rule in this page. Authorization server identity, redirect registration, consent behavior, phishing risk, token exchange and user login require separate review.