Basic Auth Header Generator
Basic Auth Header Generator
Generate Authorization headers from username/password credentials for dev and API testing.
Privacy
Processed locally in your browser. We do not store or upload your data.
File input
Choose a file
Click, drop, or paste from clipboard.
Settings
More actions
Input: manual
Input: manualUsername: 8 chars
Result
No output
Header format: Authorization: Basic <base64(username:password)>. Full header is shown below with line wrapping for long values.
Flow
- Concatenate username and password with colon separator.
- Encode resulting bytes as Base64 text.
- Prefix with Authorization: Basic.
Example
Worked example: username/password to header
- 1 Input username=api-user and password=s3cr3t-pass.
- 2 Tool encodes api-user:s3cr3t-pass with Base64.
- 3 Output header starts with Authorization: Basic ...
Generated header is ready to paste into API clients.
How
- Enter username and password values.
- Generate header in Authorization format.
- Copy output directly into request tooling.
Cases
- Build headers quickly for staging API smoke tests.
- Avoid manual Base64 encoding mistakes in CLI requests.
- Document expected auth header format for teammates.
Avoid
- Sending Basic auth over insecure HTTP connections.
- Forgetting colon separator between username and password.
- Assuming Base64 encoding is equivalent to encryption.
FAQ
Does this encrypt my credentials?
No, Basic auth uses Base64 encoding, not encryption.
Can I copy full header line?
Yes, output includes the Authorization header prefix for direct use.
Is input sent to a server?
No, credential encoding is done locally in your browser.
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