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HTTP Status Code 400

A status code 400, also known as "Bad Request," is an error message in the communication between web browsers and servers. It indicates that the server received a request that it couldn't understand or process due to an issue on the client side (i.e., your web browser or the device you're using).

Here's a breakdown of what a 400 error means:

  • Cause: The error is caused by something wrong with the request you sent to the server. This could be due to typos in the web address (URL), invalid formatting in the request, or data missing from the request.
  • Client-side error: Unlike a 404 error (page not found), which is a server-side error, a 400 error originates from the client (your device).
  • Vague error message: The 400 code itself doesn't provide specific details on what's wrong with the request.

Examples of what might cause a 400 error include:

  • Typing a web address incorrectly (e.g., missing a character).
  • Trying to submit a form without filling in required fields.
  • Sending data to the server in an incorrect format.

If you encounter a 400 error, you'll typically see an error message on your web browser. The message may not be very specific, but you can try troubleshooting by:

  • Checking the URL for typos and make sure it's spelled correctly.
  • Refreshing the page.
  • Checking if any forms you're trying to submit have missing fields.

Other 4xx Status Codes

400 Bad Request