ERR_RESPONSE_HEADERS_TOO_BIG
ERR_RESPONSE_HEADERS_TOO_BIG Error
What This Error Means
This error occurs when the server sends a response with headers that exceed the size limit the browser is willing to accept. This is the client-side counterpart to HTTP 431.
Common Causes
- Server sending too many Set-Cookie headers.
- Excessive metadata in custom headers.
- Server misconfiguration sending large debug data in headers.
How to Fix It (For Users)
- 1 Try accessing the site in Incognito mode (fewer cookies sent back).
- 2 Clear cache and cookies.
For Site Owners / Developers
- Audit your server's response headers.
- Reduce the number and size of cookies set.
- Remove unnecessary custom headers.
- Check for header duplication bugs in your application.
When It Is NOT Your Fault
If the server is spamming headers.
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