Guides
Short, practical explanations of the problems our tools detect — written to be worked through in order, not skimmed.
Why Is My Website Down?
Work through the real causes of website downtime — DNS, expired domains, SSL, hosting limits and application errors — in the order that finds the fault fastest.
Why Is My Website Slow?
Separate server-side slowness from browser-side slowness, find the actual bottleneck, and fix the causes that matter most.
How to Improve Website Speed
A practical, ordered checklist for making a website faster — caching, compression, images, fonts, scripts and hosting.
How to Fix SSL Errors
Understand the common SSL and HTTPS browser errors, what causes each one, and the exact fix for each case.
How to Fix DNS Problems
Diagnose DNS issues in the right order: registrar, nameservers, records, then propagation.
How to Fix Broken Links
Find dead internal and external links, decide between redirecting and removing, and stop new ones appearing.
What Is SPF?
SPF explained: what the record does, how to write one correctly, and the mistakes that silently break email delivery.
What Is DKIM?
DKIM explained: how message signing works, where the public key lives, and how to set it up per sending platform.
What Is DMARC?
DMARC explained: how the policy works with SPF and DKIM, what each policy value means, and a safe rollout sequence.