HTTP 400: 400 Bad Request

What Does HTTP 400 Mean?

HTTP 400 Bad Request indicates that the server cannot process the request due to perceived client errors.

Causes and How to Fix HTTP 400

Malformed syntax, invalid JSON payloads, corrupted cookies, or oversized HTTP request headers.

SEO & Search Engine Impact

Prevents web crawlers from indexing content. Must be resolved in API client payloads.

Web Server Configuration (Nginx & Apache)

Configure custom error handling in your web server:

# Nginx Custom Error Handler
error_page 400 /400.html;
location = /400.html {
    root /var/www/html;
    internal;
}