Authentication Header Generator

Authorization Header Builder

Quickly generate Basic, Bearer, or custom authentication headers and verify if Basic headers can be decoded correctly.

Generated Result

Basic is just Base64 encoded, not encrypted.

Basic Header Decode

Paste an existing Authorization header to quickly check username, password, and whether the Base64 is valid.

Scheme
Basic
Token
ZGVtbzpwQHNzdzByZA==
Username
demo
Password
p@ssw0rd
Basic header format is valid
{
  "scheme": "Basic",
  "token": "ZGVtbzpwQHNzdzByZA==",
  "username": "demo",
  "password": "p@ssw0rd",
  "error": null
}

Generate Authorization headers online, save time from manual writing and typos.

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Use Cases

  • Quickly generate standard Authorization headers for debugging APIs, copy into Postman, curl, or code for direct use
  • Paste JWT or OAuth2 tokens when calling APIs to quickly generate Bearer Token request headers
  • Use custom auth schemes (like ApiKey) to reproduce issues when troubleshooting 401/403 permission errors
  • Paste Basic request headers after packet capture to decode and view original username and password content

How to Use

  1. Select auth type (Basic Auth, Bearer Token, or custom auth scheme)
  2. Enter username and password, Token, or custom Scheme and Token
  3. Tool automatically generates standard Authorization request header and displays complete content
  4. Copy complete request header or just the Token part, or paste Basic request header in decode area to view original info

Features

  • Authorization header configured right the first time: Basic, Bearer, ApiKey all generated directly
  • Fewer detours in integration: Get auth headers right first when facing 401, 403, or signature failures
  • Both generation and reverse-lookup available: Generate Authorization headers and decode Basic credential content
  • Sensitive info processed locally: Username, password, and Token are not uploaded, copy and test immediately

FAQ

How to generate Authorization request headers online?

Enter username and password to generate Basic Auth, input Token to generate Bearer header, or combine ApiKey format as needed. Suitable for getting auth info right in one go.

What's the difference between Basic Auth and Bearer Token request headers?

Basic Auth is typically used for username/password authentication, generating a Base64-encoded Authorization header. Bearer Token is commonly used for JWT, OAuth2, and various API token authentication, carrying access tokens directly in the request header.

Can the generated auth headers be used with Postman, curl, and Apifox?

Yes. Generated Authorization headers can be directly copied to Postman, Apifox, Swagger, curl commands, or frontend/backend integration environments to quickly reproduce API auth scenarios and troubleshoot 401, 403, and other permission errors.

Is it safe to generate auth headers online? Will usernames, passwords, and Tokens be uploaded?

The tool uses browser local processing mode. Auth info can be generated and validated without uploading to servers. Suitable for handling test environment credentials, Bearer Tokens, and temporary API keys, minimizing sensitive credential leakage risks.