How to Fix the “400 Bad Request” error message from a website


Whenever you access any website from a specific domain. For example….

In the URL above, the domain is “” and “morepages” is a sub-site. The problem shows as the following:

Bad Request

Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.




It wasn’t clear at first but the error message is telling me exactly what the problem is (the keyword here ladies and gentlemen is “cookie”)

The problem was due to a cookie that has become corrupted. Not sure how it got that way but it seems that the last time it was generated something went wrong.   The easy solution is to delete all your cookies but here is the best way to solve that specific issue, I have created a customized guide for Firefox, Chrome, and Internet Explorer.


1. Access the options from the main menu

2. Go to the Privacy tab

3. Click “remove individual cookies”

4. You will get the window below and you can search for cookies on that specific domain (in our example

5. To delete the cookies, just select and click “Remove Cookie”

6. Try accessing the site again, if you still have issues you can repeat from step 4

Internet Explorer

1. Access the options from the main menu Tools -> Internet Options

2. Select Settings under the “Browsing history” section in the General tab

3. Select “View files”

4. You can search for those cookies and manually delete them

Google Chrome

1. Click on Settings

2. Enter “cookies” in the search field then click “Content settings”

3. Click “All cookies and site data” under Cookies

4. Select the specific cookie to delete the cookie


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That should fix the error message “400 Bad Request”, if you have any questions or concerns please leave a comment below. You can also follow me on Twitter, add me to your circle on Google+, or like my Facebook page to keep yourself updated on all the latest of Hardware and Software reviews.

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  1. Which URL are you trying to access?

    Please post a screenshot of the browser showing the error along with the address you are trying to access so I can attempt to troubleshoot


    • I tried clearing my cookies and browsing history and nothing is helping.
      Whenever I try to go to tumblr, it shows up as a blank white page and in the top left corner it just says:

      “400 Bad request
      Your browser sent an invalid request.”

    • Glad you were able to solve your issue by following the instructions. Please re-share the article on social media so more ppl who have the same issue can also find the solution. Thanks

  2. Did not work for me for Firefox, which seems to be the only browser giving this error. Just started seeing the error today. My site is Would love to know if you have any other ideas. Noticing I get the ‘400 bad request’ error about every two times I load a page. Also on the time that it loads not everything is loading.

    • Hello Pamel Rose, if the solutions above did not work. Another possible solution and suggestion would be to flush out your DNS cache by doing the following:

      Open the command prompt, and type “ipconfig /flushdns” then press enter

      It should give you the following message:
      “Successfully flushed the DNS Resolver Cache.”

      • That issue can be caused by corrupted cookies.
        Clear the cache and the cookies from sites that cause problems.
        “Clear the Cache”:
        Tools > Options > Advanced > Network > Offline Storage (Cache): “Clear Now”
        “Remove Cookies” from sites causing problems:
        Tools > Options > Privacy > Cookies: “Show Cookies”.

        It works for me because I had the same problem with my Firefox and deleting cookies does not fixed “Error 400″. By the way – nice site Pamela : ) Greetings Timour.

  3. I get this error code on my phone’s browser. I’ve tried deleting all the cookies, cache, history, everything. It seems as though I only get the error code when the website begins with https:// rather than http://. Any suggestions?

  4. I have to run a PC test for a work from home company called the link they include starts up a Java based test to check to see if my Computer is up to snuff (it so totally is) when I go to run the test I get the Bad request message. I have tried different browsers, all the advice you put in this thread, checking to make sure java is up to date, etc. All to no avail. I even emailed them to ask for help but they basically tell me to make sure I have Java (no duh) Please advise if you can.

  5. Thanks to helpful fellows humans like you, normal people like me how can use a computer but do not know how to deal with such problems receive valuable help. Thank you so much!!!

  6. When I don’t delete cookies I receive this :

    Bad Request – Invalid Verb
    HTTP Error 400. The request verb is invalid.

    And when I delete cookies I first receive an empty page of that website and in second refreshing the page I receive that error message again .

    But website comes up on other computers .

    Ohhhhhhhhhhh .. Damn it … this is my own website …

  7. I am actually grateful to the holder of this website who has
    shared this impressive post at at this time.

  8. Hi, I was trying to visit and this error came up. I’ve removed the cookies, but it’s not working.

  9. I tried to follow instruction for Google Chrome. Apparently, there is no cookies connected to page which doesn’t work. I checked twice, by clicking on the small sheet to the left of web address. There are none – neither cookies to allow nor to block. Can you help me?

  10. Pingback: “400 Bad Request” en Chrome « SCyASIG

  11. Thanks – worked a treat. Only problem was that this weird-ass box that comes up on the left of your page inviting me into social media sites – it covers half the text (in Chrome).

  12. I have the same problem on my adroid phone~ and already clear all the cookies and restart my phone, but the problem is still there~