Getting HTTP 431 - Request Header Fields Too Large. How to Fix This Error? or HTTP 431 Error: Why Are

HTTP 431 usually means the server’s like "nope, too much junk in the trunk." 😂

For debugging, I love Fiddler (free tool) to see all headers in detail.

Also, if you’re using Node.js, check out the ‘helmet’ middleware—it can help manage headers.

Pro tip: If you’re stuck, try stripping out non-essential headers one by one until it works. Annoying, but effective.