How to Fix 400 Bad Request - Windows ASP.NET Core Hosting 2024 | Review and ComparisonWindows ASP.NET Core Hosting 2024 | Review and Comparison

What is an HTTP 400 Error?

You do occasionally encounter errors when browsing the web, right? The 400 error code from HTTP could be one of those messages. Its literal translation is “Bad Request.” Imagine attempting to communicate with someone in a language they don’t know; they will be perplexed. Similar to this, an HTTP 400 error is returned by your browser (such as Chrome or Firefox) when it receives a request that the website’s server cannot process.

Common Causes of HTTP 400 Error

Consider this error as a minor hiccup on your online travels. Here are some potential causes:

  1. Typing Mistakes in the URL Web Address: Entering the incorrect web address can result in this error, just like typing a friend’s phone number incorrectly can put you in touch with the wrong person.
  2. Too Much Saved Data: Websites store some of your data in items referred to as “cookies.” However, if there is too much data saved, an error could result.
  3. Wrong Request Setup: It is comparable to attempting to fit a round peg into a square hole. The request won’t fit if it is configured incorrectly, leading to an error.
  4. Expired Login Details: This error message may appear if the password or other login information you are asked to enter is outdated or incorrect.

How to Recognize the Issue

It’s like playing detective to figure out why this error occurred. Here’s how to locate hints:

  • Use Browser Inspector Tool: Tools in contemporary browsers provide more information about errors. Open them up and look inside for hints. F12 on the Browser will bring up the inspector.
  • Check the Website’s Records: You can check the server logs if you are the owner of a website. You might discover the cause of the error there because it acts as a log of the website’s activities.
  • Use Online Website Checkers: Some websites have the ability to error-check other websites. Utilizing them could assist in identifying the issue.

How to Prevent the Issue

Can we prevent this error from occurring? Great concept! As an example:

  • Double-Check Web Addresses: Verify that you typed the address correctly before pressing the enter key.
  • Clear Old Data: Clear your browser’s cookies, DNS cache, and saved information occasionally.
  • Follow Instructions: Pay close attention to the instructions provided on a website or mobile application when making a request.
  • Update Regularly: Update your apps and web browser. Newer versions typically fix previous issues.

How to Fix 400 Error

Don’t worry if you’ve already encountered this mistake. How to get back on track is as follows:

  • Refresh: Reloading the website can sometimes fix the problem.
  • Check the URL Address: Verify that the website address is correct.
  • Check with Online if you receive a different response, continue with the next steps; if not, there is a problem with the website itself. Check the error logs if you’re the owner.
  • Clear Some Data: Try deleting the cookies and DNS cache from your browser before returning to the website.
  • Ask for Help: Try contacting the owner of the website you’re trying to access and let them know there’s a problem.


I hope tutorial above can assist you if you experience 400 bad request above. I will back with other tips. Thank you.