http error 431 request header fields too large

[robertwilliam]

hitting a 431 error when accessing my local dev server. how do i clear the headers or increase the size limit in node?

 

[TrasvisHead]

hey, 431 errors usually mean your request headers are too big. had this happen before. often it's super large cookies being sent with every request, especially during local dev.

check your browser's dev tools network tab to see what headers are going out. you might need to clear site data for your dev server.

if you're running something like nginx or caddy in front of node, that's where you'd typically increase header buffer limits. for pure node, it's more about what the client is sending.

- check cookies: often the culprit.
- custom headers: too many or too big?
- proxy config: if you use one (like nginx), adjust its header buffer settings.

 

[KassieRosa]

hey, 431 errors usually mean your request headers are too big. had this happen before. often it's super large cookies being sent with every request, especially during local dev.

check your browser's dev tools network tab to see what headers are going out. you might need to clear site data for your dev server.

if you're running something like nginx or caddy in front of node, that's where you'd typically increase header buffer limits. for pure node, it's more about what the client is sending.

- check cookies: often the culprit.
- custom headers: too many or too big?
- proxy config: if you use one (like nginx), adjust its header buffer settings.

oh yeah thanks that's a good tip

 

[jenniferjohnson]

An HTTP 431 Request Header Fields Too Large error occurs when the server refuses a request because its headers are excessively large. This often results from oversized cookies or long header values. Fixes include clearing cookies, reducing header size, or adjusting server limits to accept larger headers safely.