Secure Web Design: The Design and Security Best Practices Every Site Should Follow

Design and security seem like separate worlds, but visitors experience them as one thing: they either trust your site or they don't. A broken padlock, a form that behaves strangely or a suspicious pop-up costs more sales than any color choice ever will. This is the checklist we use to review every project.

Design best practices

A clear hierarchy on every screen

Every page should answer three questions in under five seconds: what you offer, who it's for and what the visitor should do now. Use a single main title (H1), subheadings that can be skimmed, and a primary button that stands out without competing with others.

Readable contrast and type size

Normal text needs a contrast ratio of at least 4.5 to 1 against the background (3 to 1 for large text), according to the WCAG accessibility guidelines. For comfortable reading, use 16 px or larger for body text and lines of 50 to 75 characters.

Design for mobile first

Most visits to business sites come from a phone. Buttons and links need a touch target of at least 44 px, and nothing important should depend on hovering.

Fewer fonts, fewer effects, more consistency

Two type families are enough. Motion effects should have a purpose (showing what changed) and respect the user's “reduce motion” system preference.

Visible, genuine trust

Real contact details, a privacy notice, verifiable customer reviews and examples of your own work. Avoid invented figures and stock photos passed off as your team: visitors and Google both notice.

Security best practices

HTTPS everywhere and security headers

A valid certificate, HTTP-to-HTTPS redirection and headers such as HSTS, X-Content-Type-Options, Referrer-Policy and a content security policy (CSP) that limits where scripts can be loaded from.

Forms that resist abuse

• Always validate data on the server, not just in the browser.
• Add an invisible challenge (such as Cloudflare Turnstile) or a honeypot field to stop bots.
• Limit the number of submissions per IP address.
• Don't show error messages that reveal technical details.

Fewer pieces, fewer weak points

Every plugin, library or third-party script is a possible door. Install only what's necessary, remove what you don't use and keep everything updated. On WordPress sites, the most common cause of hacks is outdated plugins.

Accounts, secrets and backups

• Two-step verification on your hosting, domain, email and site admin panel.
• Unique passwords in a password manager; never shared over chat.
• Keys and tokens kept out of the code, in environment variables.
• Automatic backups and a real restore test at least once a year.

Cookies and privacy

Session cookies should use the Secure, HttpOnly and SameSite flags. And if you collect personal data (even just an email address), publish a clear privacy notice.

A quick checklist to review your site today

1. Does it open with a padlock on every page, without warnings?
2. Does each page have a single H1 and an obvious primary button?
3. Does it read well on your phone, one-handed?
4. Do your forms have bot protection?
5. Do you have backups, and do you know how to restore them?
6. Do you know who has access to your site, domain and email?

If any answer is “I don't know”, it's a good time for a review. We can do it for you.