Error Reference

Understand web errors, what causes them, and how to fix them. From HTTP status codes to connection issues.

Connection Errors

ECONNREFUSED

Server actively rejected the connection

ETIMEDOUT

No response received within timeout period

DNS Resolution Error

NXDOMAIN, SERVFAIL, and domain resolution issues

SSL/TLS Error

Certificate expired, invalid, or handshake failed

CORS Error

Cross-origin request blocked by browser

500

Internal Server Error

502

Bad Gateway

503

Service Unavailable

504

Gateway Timeout

522

Connection Timed Out (Cloudflare)

HTTP Status Codes

Complete reference for all HTTP status codes (1xx-5xx)

SSL Checker Tool

Check your SSL certificate status and expiry

Is It Down?

Check if a website is down for everyone or just you

Test Endpoints

Test API endpoints with various HTTP methods