Random OAuth Token Generator
Generate OAuth 2.0 access tokens, refresh tokens, and OpenID Connect ID tokens for API testing, authentication development, and third-party integration testing
Our OAuth token generator creates realistic OAuth 2.0 tokens including access tokens, refresh tokens, and OpenID Connect (OIDC) ID tokens for testing authentication flows, API security, and third-party integrations. Generate OAuth tokens with customizable formats (Base64, Base64URL, hex, alphanumeric), token types (Bearer, MAC, Basic), configurable expiration times, and optional refresh token support. Perfect for API authentication testing, OAuth 2.0 flow validation, OpenID Connect development, and simulating token exchange mechanisms. OAuth tokens enable delegated authorization allowing applications to access resources on behalf of users without sharing credentials. Use our generator for OAuth 2.0 testing in authorization server development, resource server validation, client application testing, and educational demonstrations of modern authentication protocols.
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What is an OAuth Token Generator?
An OAuth token generator creates the three primary token types used in OAuth 2.0 and OpenID Connect authentication flows. **Access tokens** (required) grant access to protected resources with configurable expiration times (typically 1 hour to 30 days), formatted as random cryptographic strings in Base64, hex, or alphanumeric encoding. **Refresh tokens** (optional) enable obtaining new access tokens without re-authentication, usually with longer lifetimes (weeks to months) for improved user experience while maintaining security through rotation. **ID tokens** (optional, for OpenID Connect) contain user identity information in JWT format, providing authentication layer on top of OAuth 2.0 authorization. Token types indicate the authentication scheme: Bearer tokens (most common) sent in HTTP Authorization headers, MAC tokens requiring message authentication codes, and Basic tokens for legacy systems.
Our generator supports OAuth 2.0 RFC 6749 and OpenID Connect specifications, creating realistic test tokens suitable for all standard OAuth flows: Authorization Code (most secure for web apps), Implicit (deprecated, was used for SPAs), Resource Owner Password Credentials (username/password, limited use), Client Credentials (machine-to-machine), and Device Code (for input-constrained devices). Each generated token set includes access_token, token_type, and expires_in following OAuth 2.0 response format. Optional refresh_token enables testing token rotation strategies, while id_token supports OpenID Connect user authentication testing. Use OAuth token generation for developing authorization servers, testing resource server token validation, simulating client application flows, validating token introspection endpoints, and educational demonstrations of delegated authorization concepts.
OAuth Token Generator Configuration
Count (1-10 Token Sets)
Token Length (20-256 chars)
Format (Base64/Hex/Alphanumeric)
Token Type (Bearer/MAC/Basic)
Expiration Time (1 hour - 30 days)
Include Refresh Token
Include ID Token (OpenID Connect)
How to Generate OAuth Tokens
[STEP 1] Configure Token Parameters
Choose count (1-10 sets), token length (40 recommended), format (Base64URL for URLs, Base64 for headers), token type (Bearer for modern APIs), and expiration (1 hour for access tokens balancing security and UX). Consider your OAuth flow: Authorization Code uses all token types, Client Credentials may skip refresh tokens.
[STEP 1] Enable Optional Tokens
Check "Include Refresh Token" for flows supporting token rotation (Authorization Code, Resource Owner Password). Refresh tokens enable long-lived sessions with short-lived access tokens. Check "Include ID Token" only for OpenID Connect authentication testing where user identity verification is required beyond authorization.
[STEP 1] Generate & Inspect Tokens
Click EXECUTE GENERATION to create OAuth token sets. Each set displays access_token (always present, color: cyan), refresh_token (if enabled, color: yellow), and id_token (if enabled, color: magenta). Use individual COPY buttons to grab tokens for testing. Verify token_type is Bearer, expires_in shows seconds, and format matches selection.
[STEP 1] Test OAuth Flows
Use access tokens in HTTP Authorization headers: "Authorization: Bearer
OAuth Token Best Practices
- _ Short-Lived Access Tokens - Use brief expirations (1-2 hours) for access tokens to limit damage from theft. Combine with longer-lived refresh tokens (days/weeks) to maintain sessions without sacrificing security. This pattern enables immediate revocation while preserving user experience.
- _ Token Rotation - Implement refresh token rotation: issue new refresh token with each access token refresh, invalidating old refresh token. This limits replay attacks and enables detection of token theft when old refresh token is reused.
- _ Secure Storage - Store access tokens in memory (not localStorage). Store refresh tokens in httpOnly, secure, sameSite cookies to prevent XSS attacks. Never expose tokens in URLs or logs. Consider token encryption at rest for persistent storage.
- _ HTTPS Only - Always transmit OAuth tokens over HTTPS/TLS. Bearer tokens in plain HTTP can be intercepted via man-in-the-middle attacks. OAuth 2.0 RFC 6749 mandates TLS for all token endpoints and protected resources.
- _ Scope Limitation - Include scope parameter to request minimum necessary permissions. Avoid requesting all scopes upfront. Use incremental authorization for additional permissions only when needed, limiting token privilege.
- _ Token Validation - Resource servers must validate: token signature (for JWTs), expiration (exp claim or database lookup), revocation status (check blacklist or introspection endpoint), scope (ensure sufficient permissions), audience (aud claim matches resource server).
Technical Implementation
Our OAuth token generator creates RFC 6749 compliant tokens with cryptographically secure randomness, multiple encoding formats, and optional refresh/ID tokens following OAuth 2.0 and OpenID Connect specifications:
// OAuth Token Generation Algorithm (RFC 6749)
Algorithm: OAuth 2.0 Access Token + Refresh Token + ID Token
// Step 1: Generate Access Token
random_bytes = cryptographically_secure_random(length)
if (format == "base64") then:
access_token = base64_encode(random_bytes)
else if (format == "base64url") then:
access_token = base64url_encode(random_bytes)
else if (format == "hex") then:
access_token = hex_encode(random_bytes)
else: // alphanumeric
access_token = random_alphanumeric(length)
// Step 2: Build OAuth Response
response = {
"access_token": access_token,
"token_type": token_type (e.g., "Bearer"),
"expires_in": expires_in (seconds)
}
// Step 3: Optional Refresh Token
if (include_refresh) then:
refresh_token = generate_token(refresh_length, format)
response["refresh_token"] = refresh_token
response["refresh_expires_in"] = refresh_expires_in
// Step 4: Optional ID Token (OpenID Connect)
if (include_id_token) then:
id_token = create_jwt_with_user_claims()
response["id_token"] = id_token
// OAuth 2.0 Token Response Format (RFC 6749 Section 5.1)
HTTP/1.1 200 OK
Content-Type: application/json
{"access_token":"...","token_type":"Bearer","expires_in":3600}