Category
Usability Heuristics
Nielsen Norman Group's ten heuristics — the foundational checklist for interfaces that feel usable.
10 principles
Visibility of System Status
Always tell users what's happening, with clear feedback delivered in good time.
Read →Match Between System and the Real World
Speak the user's language — use familiar words and conventions, not internal jargon.
Read →User Control and Freedom
Give users a clearly marked way to undo, exit, or go back — they click things by mistake.
Read →Consistency and Standards
Follow platform conventions and stay internally consistent so the same thing always means the same thing.
Read →Error Prevention
Stop problems before they happen — that beats even the best error message.
Read →Recognition Rather Than Recall
Show options and information on screen — don't make users carry them in their head between steps.
Read →Flexibility and Efficiency of Use
Serve novices and experts at once — let experienced users take shortcuts the rest never see.
Read →Aesthetic and Minimalist Design
Every extra element competes with the important ones — cut what doesn't earn its place.
Read →Help Users Recognise, Diagnose, and Recover From Errors
Error messages should be plain English, name the exact problem, and suggest the fix.
Read →Help and Documentation
Even a self-evident interface should offer help that's easy to find and focused on the task.
Read →See these principles on your own site
Run a free Kweri audit — a plain-English review of your site’s speed, accessibility, SEO and design, ranked by what to fix first. No login, no jargon.
Run a free audit →