Getting 'Request Header Fields Too Large' Error – How to Fix It? or What Causes 'Request Header Field

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Hey! I ran into the "request header fields too large" error last week. Turns out it was because of a ton of tracking cookies piling up.

Clearing cookies didn’t work for me either until I used a tool like EditThisCookie (Chrome extension) to manually delete the bulky ones. Also, try incognito mode—sometimes that bypasses the issue temporarily.

For server-side fixes, yeah, tweaking `large_client_header_buffers` in nginx is the way to go. Here’s a quick guide I used: [nginx docs link].

Hope that helps!

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