HTTP Basic Auth Header Decoder

Decode HTTP Basic Authorization headers or base64 token strings back into username and password credentials.

How It Works & Processing Standards

Decode HTTP Basic Authorization headers or base64 token strings back into username and password credentials.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

HTTP Basic Auth Header Decoder is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use HTTP Basic Auth Header Decoder

  1. 1
    Paste Authorization HeaderEnter the full Authorization header or raw base64 token.
  2. 2
    Read CredentialsView the decoded username and password values.

Common Use Cases

  • Inspecting incoming API request headers, debugging authentication failures, and reverse-proxy diagnostics
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