Quick Guide To Fix it (updated)

Understand the HTTP 401 Unauthorized error code: What the causes are and how to fix it.

Table of Contents

The 401 HTTP is a client-side standard response status code. This error response indicates that the client request has not been completed because it lacks valid authentication credentials for the requested resource.

For instance, you get this HTTP 401 error code when you are trying to access a password protected page. You can also get this 401 error if your credentials expired.

For example, in Chrome browser, you’ll likely see a simple message telling you that “This page isn’t working”, like this one:

Sometimes, the server replies with a standardized error page, e.g. the Nginx 401 Authorization Required:

401 Unauthorized vs 403 Forbidden

The 401 error is similar to the “HTTP Error 403 Forbidden“. We get the 403 when we have valid credentials (or don’t need them) but access to the resource isn’t permitted (in other words, you are trying to access a private or restricted resource the server will never give you, no matter what).

On the other hand, we get the 401 status code when the resource is available, but we don’t provide, or don’t have, valid credentials.

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All HTTP Status Codes

203 Non-Authoritative Information

204 No Content

205 Reset Content

206 Partial Content

208 Already Reported

226 IM Used

300 Multiple Choices

301 Moved Permanently

303 See Other

304 Not Modified

305 Use Proxy

307 Temporary Redirect

308 Permanent Redirect

400 Bad Request

402 Payment Required

404 Not Found

405 Method Not Allowed

406 Not Acceptable

407 Proxy Authentication Required

408 Request Timeout

411 Length Required

412 Precondition Failed

413 Payload Too Large

414 Request-URI Too Long

415 Unsupported Media Type

416 Requested Range Not Satisfiable

417 Expectation Failed

418 I’m A Teapot

421 Misdirected Request

422 Unprocessable Entity

424 Failed Dependency

426 Upgrade Required

428 Precondition Required

429 Too Many Requests

431 Request Header Fields Too Large

444 Connection Closed Without Response

451 Unavailable For Legal Reasons

499 Client Closed Request

Holistic SEOTechSEO401 HTTP Response Status Code Definition: Example, Usage, Methods

What does 401 HTTP Status Code Mean?

The 401 HTTP Status Code which means unauthorized is returned when the server refuses to respond to a request because the client authentication required to access the resources is missing.

How to Use 401 HTTP Status Code for a Website?

To use the 401 HTTP Status Code, the server must authorize the client before it may access a resource.

How to Check 401 HTTP Status Code?

To check 401 HTTP Status Code Unauthorized Errors are listed below.

Which HTTP Method is used with 401 HTTP Status Code?

The HTTP methods that are used with the 401 HTTP Status Codes are given below.

The related HTTP Response Headers with 401 HTTP Status Code are listed below.

What are the Browsers Compatibility of 401 HTTP Status Code?

You can see the table that shows the browser’s compatibility of the 401 HTTP Status Code below.

What are the other Similar Status Codes to 401 HTTP Status Code?

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