3 Ways to Fix Request Header or Cookie Too Large

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4 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Visiting a site on your browser could return therequest header or cookie too largeerror message. You already know that cookies are small bits of data that your browser stores locally.

They’re used for authentication andtracking purposes, but if they exceed a certain limit, they can make accessing a website impossible. Here’s how to resolve this issue.

What does 400 request header or cookie too large mean?

Arequest header or cookie too largeerror appears when you attempt to open a given website, but instead of bringing up the expected content, it brings up this error.

This indicates that the server is refusing to fulfill your request because the request header size has exceeded the capacity limits of either the server or the software that runs it.

The exact size of the limit depends on the server’s configuration and operating system.

There are several reasons why this can happen:

How do I fix 400 Bad Request request header or cookie too large?

Perform the following basic checks before moving on to the slightly advanced solutions:

1. Clear browser cookies

2. Perform a browser scan

A browser scan will attempt to fish out any infected extensions and hopefully resolve this error.

3. Reset your browser

If none of these methods fix therequest header or cookie too largeerror, the problem is with the server. You can communicate with the owner of the site or give it some time and see if it fixes itself.

You may also encounter abrowser sent request this server could not understand, so ensure you pass by our detailed article and apply our recommended fixes.

Let us know of any other insightful solutions you may have on this error below.

3 Ways to Fix Request Header or Cookie Too Large#

What does 400 request header or cookie too large mean?#

How do I fix 400 Bad Request request header or cookie too large?#

1. Clear browser cookies#

2. Perform a browser scan#

3. Reset your browser#