Last reviewed October 2026.
The principles of good website design come down to eight ideas: give every page one job, show what matters first, keep text easy to read, behave like other sites, keep things simple, make navigation obvious, load fast and work for everyone. When a page follows them, visitors find what they need and act. When it breaks them, visitors leave.
This guide explains each principle in plain English. For every one, you get the reason it works, a common mistake and a quick test you can run on your own site. If you want fast fixes after reading, go to our companion list of 15 web design tips. Both are part of our small business web design guide.
In this guide
- The principles of good website design, tested
- Principle 1: Give every page one job
- Principle 2: Show what matters first
- Principle 3: Make text easy to read
- Principle 4: Behave like other sites
- Principle 5: Keep it simple and grouped
- Principle 6: Make navigation obvious
- Principle 7: Load fast
- Principle 8: Work for everyone
- Principles at a glance
- A before-and-after example (hypothetical)
- A 30-minute design review you can run alone
- Common mistakes across all eight
- Frequently asked questions
- Next steps
The principles of good website design, tested
Design advice often sounds like opinion. “Use more white space.” “Make it pop.” These principles are different. Each is tied to how people look at screens, or to a published standard, so you can test it instead of arguing about it.
One finding sets the tone. Nielsen Norman Group studied how long people stay on pages and found that users are most likely to leave in the first 10 seconds. The study is from 2010 data, but the lesson is current: a visitor decides fast, so the design has to help them fast.
Principle 1: Give every page one job
A homepage sorts visitors. A service page sells one service. A contact page gets a message or a call. When a page tries to do three jobs, it does none well.
Why it works: visitors arrive with one question. A page that answers it clearly gets a yes. A page that answers five questions at once gets a scroll and a back button.
Common mistake: a service page that also tries to tell the company story, show the team and pitch every other service.
Test it: write one sentence that starts, “After reading this page, the visitor should ____.” If you need the word “and” twice, split the page.
Principle 2: Show what matters first
This is visual hierarchy. Nielsen Norman Group defines it as guiding the eye on the page so that it attends to different design elements in the order of their importance. Three tools do most of the work: size, contrast and grouping. Bigger elements attract attention first. Strong contrast pulls the eye. Related items placed together read as one idea.
People also scan. In an older Nielsen Norman Group study, 79 percent of test users always scanned a new page, and only 16 percent read word by word. The group’s later eyetracking work found an F-shaped scanning pattern, which is the default when nothing guides the eye. The fix is simple. Put the key point early. Use headings that stand out. Start them with the most useful words.
Common mistake: everything is the same size and color, so nothing leads.
Test it: squint at your page, or blur it. What stands out first? If it is not your headline and your main button, change the sizes or contrast.
Principle 3: Make text easy to read
Good design lets people read without effort. Three habits cover most of it: enough contrast, comfortable size and short lines of text.
- Contrast. WCAG 2.2 asks for a ratio of at least 4.5 to 1 for normal text and 3 to 1 for large text. Light gray on white often fails.
- Size. Body text should be readable on a phone with no zoom. WCAG also expects text to scale up to 200 percent without breaking the page.
- Short paragraphs. Three or four lines on a phone. Use lists for steps and options.
Common mistake: pale text over a photo, or tiny gray captions that carry key facts.
Test it: paste your text and background colors into a free contrast checker. Then read a page on your phone at arm’s length.
Principle 4: Behave like other sites
Nielsen’s old rule still holds: users spend most of their time on other sites, so they expect yours to work the same way. The logo sits at the top left and goes home. The menu is at the top. Links look like links. A shopping cart or phone icon is where people expect it.
This does not mean looking boring. It means saving your creativity for photos, words and layout, and not reinventing the menu.
Common mistake: a clever menu that hides behind an unlabeled icon on desktop, or links that look like plain text.
Test it: ask someone to find your phone number and your main service without help. If they hesitate, the pattern is unfamiliar.
Principle 5: Keep it simple and grouped
Simple does not mean empty. It means every element earns its place. Group related things close together and leave space between groups. Nielsen Norman Group notes that grouping is usually shown through proximity and white space.
Beauty helps, but it has limits. Nielsen Norman Group describes the aesthetic-usability effect: people see attractive products as more usable. A nice look makes visitors forgive small problems. It does not forgive big ones. A good-looking site with a broken form still loses leads.
Common mistake: a homepage with a slider, three pop-ups, a video, a banner and nine buttons.
Test it: count the buttons and links in the first screen. If you cannot name the most important one, there are too many.
Principle 6: Make navigation obvious
Visitors should always know where they are, where they can go and how to get home. Use plain labels such as Services, About, Reviews and Contact. Keep the menu short. Show the phone number in the header.
Link text matters too. The W3C accessibility rules ask that the purpose of each link can be told from its text. “Read our roofing repair guide” works. “Click here” does not.
Common mistake: a menu with a dozen items, or clever labels like “Solutions” that tell the visitor nothing.
Test it: list your menu items. Could a stranger guess what is behind each one?
Principle 7: Load fast
Slow pages lose people before the design can do anything. Google’s Core Web Vitals give targets: 2.5 seconds or less to load the main content, 200 milliseconds or less to respond, and 0.1 or less for layout shift. Google says good page experience does not promise top rankings, but it is part of what its systems look at.
Design choices often cause slowness. Large photos, many fonts, auto-playing video and sliders all add weight. Our speed guide covers the fixes.
Common mistake: a full-width photo that is several times larger than the screen needs.
Test it: run PageSpeed Insights on your homepage and open the mobile tab.
Principle 8: Work for everyone
Accessible design is good design. Most of the earlier principles already help: contrast, size, clear links and a simple layout. A few more points are worth checking.
- Color should not be the only way to show something. The WCAG rule is that color is not used as the only visual means of conveying information. Add a label or icon as well.
- Images need short, useful alt text.
- Every action should work with a keyboard, not just a mouse.
- Forms need visible labels.
The U.S. Department of Justice says the ADA applies to businesses open to the public, and that an inaccessible website can limit access to their offerings. It names WCAG as a helpful reference. This is not legal advice. Our website accessibility basics guide covers a first pass.
Common mistake: relying on a color change alone to show an error.
Test it: try to complete your contact form using only the Tab and Enter keys.
Principles at a glance
| Principle | Plain rule | Quick test |
|---|---|---|
| 1. One job per page | Each page has one clear purpose | Fill in the one-sentence goal |
| 2. Show what matters first | Size, contrast and grouping lead the eye | Blur the page and see what stands out |
| 3. Easy to read | Strong contrast, readable size, short blocks | Contrast checker and phone test |
| 4. Familiar patterns | Logo home, menu on top, links look like links | Ask a stranger to find your phone number |
| 5. Simple and grouped | Remove what does not earn its place | Count buttons in the first screen |
| 6. Obvious navigation | Plain labels, short menu, phone in header | List the menu items |
| 7. Fast | Meets Core Web Vitals targets | PageSpeed Insights, mobile tab |
| 8. Works for everyone | Contrast, labels, keyboard use | Complete your form with the keyboard |
A before-and-after example (hypothetical)
Here is a made-up homepage for a local roofer, to show the principles together.
| Before | After |
|---|---|
| Headline: “Welcome to our website” | Headline: “Roof repair and replacement in Carlisle, PA” |
| Slider with five photos, auto-playing | One real photo of a finished roof, loads fast |
| Eight menu items, one reads “Solutions” | Five items: Services, Reviews, Areas, About, Contact |
| Light gray body text on white | Dark text, strong contrast |
| Phone number in an image | Tap-to-call number in the header |
| Three equal-sized buttons | One large main button, one quiet link |
Nothing here needs fancy design. It needs clear decisions.
A 30-minute design review you can run alone
You do not need a design degree to use these principles. Set aside half an hour and work through your homepage and your top service page.
- Minutes 0 to 5: write the one-sentence goal for each page.
- Minutes 5 to 10: blur the page and note what stands out first.
- Minutes 10 to 15: check contrast and read the text on your phone.
- Minutes 15 to 20: ask someone else to find your phone number and your main service.
- Minutes 20 to 25: run PageSpeed Insights and note the mobile result.
- Minutes 25 to 30: tab through your contact form with the keyboard.
Write the results in a simple table: principle, pass or fail, and what to change. Fix the failures that stand between a visitor and a call first.
Common mistakes across all eight
- Designing for yourself and not for the visitor.
- Starting with colors and fonts and not with the page goal.
- Copying a competitor’s layout without checking if it works.
- Adding features because they are available.
- Never testing on a real phone.
- Treating launch as the finish line.
Frequently asked questions
What is the most important principle of web design?
Clarity of purpose. If a page does not tell visitors what it is for, nothing else rescues it. The other principles help you deliver that purpose.
How many fonts and colors should a site use?
Fewer than you think. Two fonts and a small set of colors, used the same way on every page, is a common starting point. Consistency matters more than the exact choices.
Does good design help my search results?
Indirectly. Google says its ranking systems look to reward a good page experience, and that good scores do not promise top results. Good design keeps visitors on the page, and it supports the content.
Should I follow design trends?
Only if they pass the tests above. A trend that hurts speed, reading or navigation costs more than it adds.
When is a redesign worth it?
When the problems come from the structure, not from small details. See 9 signs you need a new website and our refresh vs. redesign vs. rebuild guide.
Next steps
- Pick one important page, such as the homepage.
- Run the eight tests. Score yourself pass or fail.
- Fix the failures that block calls and forms first.
- Test again on a real phone.
If you want a second opinion, our free website teardown reviews your site the way a visitor sees it. You can also book your strategy call.
Related guides
- Small Business Web Design: The Complete Guide
- 15 Web Design Tips for a Professional Site
- What a Small Business Homepage Should Include
- Website Accessibility Basics
- Our web design service
Book your strategy call
Webfactory Media is a Carlisle, PA agency that also works with businesses across the country. If you want a clear plan for your website, book your strategy call and we will look at your site with you. You can also see how we work on our Carlisle web design page.
