7 Animations That Enhance UX and Increase Conversions

You land on a website and it looks great. Then you scroll, and every element on the page flies, spins or bounces into view. Within seconds you’ve forgotten what the site is for, and you’re reaching for the back button.

That’s the problem with animation: it’s tempting to use every effect available, and there’s no shortage of JavaScript and CSS animations to choose from. Used carelessly, they distract visitors and hurt conversions. Used with a clear purpose, they guide attention, confirm actions and make a site easier to use. This guide covers what UX motion design is, a simple checklist for choosing animations, seven animations that consistently earn their place, and how to keep motion fast and accessible.

What is motion design in UX?

Motion design in UX is the use of movement, such as button animations, sliding menus and page transitions, to communicate with users rather than to entertain them. A good animation tells people what just happened, what to do next or where they are on a site.

Think of a button that gently animates when you press it, or a menu that slides into view. In a film or video game, motion is there to entertain. In a website or app, it has a job: a button that animates on click confirms the action was registered, and a menu that slides in from one side gives users a sense of spatial awareness, so they understand where they are within the site.

It also helps to separate UI motion from UX motion. UI motion design usually focuses on individual interface elements, like buttons and menus. UX motion design looks at the bigger picture: how the whole experience flows and feels from one interaction to the next.

Why do animations improve UX and conversions?

Animations improve UX when they communicate: they direct attention to the right element, give instant feedback on an action and make transitions feel natural instead of abrupt. That clarity keeps visitors focused on your content and the action you want them to take, which is where the conversion benefit comes from.

Picture clicking through a photo gallery where each image slides smoothly to the next. It feels like flipping through a physical album. Now imagine the photos just swapping abruptly with no transition. It’s jarring. That smooth slide is motion design doing quiet work to make the experience feel intuitive.

There’s a psychological side too. People’s attention is instinctively drawn to things that move. That makes motion a powerful way to guide users, and it’s also why too much of it backfires. If everything moves, nothing stands out, and the page becomes overwhelming. Too little motion, on the other hand, can make a site feel static. The goal is balance: enough movement to guide and reassure, never so much that it competes with your message.

In our experience designing conversion-oriented websites, loading a site up with JavaScript effects more often hurts conversions than helps them. The animations that work are the ones that play a supporting role, where usability through clear structure, navigation and content stays the focus.

How do you decide whether an animation is worth using?

Give every animation a clear purpose (to guide, inform or confirm) and then run it through five checks. If it fails any of them, cut it or find an alternative.

1. Does the animation distract from the content?

View the animation in the context of the page. Do you notice the animation more than the content itself? If it’s hogging the spotlight, cross it off your list. Distracted users don’t absorb what your site is about, and they’re far less likely to take the action you want.

2. Does it improve the user and reading experience?

The only reason to animate something is to make users more engaged with your content and offers. Ask yourself whether the animation makes the content, imagery and visual elements easier to digest and interact with, and whether it supports the brand’s message. If it’s purely decorative, it probably doesn’t belong.

3. Does the animation cause confusion?

Some sites pile on so many effects (heavy parallax, text fading in and out, sliders, hidden menus where a visible one would do) that visitors lose track of where they are. Being on a site like that is like being in a fun house: you have no idea how to get where you want to go. And when users can’t find their way, they leave for a site that presents information clearly.

4. Does it slow down the page?

Many JavaScript effects and CSS animations are heavy and slow a site down, and the more you add, the slower the site loads for more of your visitors. You only have a short window to capture someone’s attention, and if the page struggles to load, impatient users hit the back button. Run your pages through Google PageSpeed Insights to see what impact your animations are having on the loading experience.

5. Does it work without glitches on every device and browser?

Be selective about the scripts you use. Plenty of them are poorly coded and full of odd bugs, and others are experimental and only work on the newest, most capable devices. Test any animation thoroughly across browsers and devices, and ask colleagues to try it on theirs. If it doesn’t pass, keep looking for one that does.

Which animations enhance UX and increase conversions?

The animations that help conversions are the ones that focus attention on your key message, reduce perceived waiting, make navigation easier or confirm that an action worked. These seven pass the checklist above. Each includes a demo link so you can see the effect in action; some of the demos are older, so treat them as a reference for the idea and rebuild them with current, well-tested code.

1. Make your headline gradually fade in

The headline is arguably the most important element on a page. It tells visitors immediately whether they’re in the right place and whether they should keep reading. A fade-in draws even more attention to it and keeps the user’s focus where you want it.

Here’s the sequence: the headline fades in first, the subheadline right after, and finally the call-to-action button beneath them. Because these are the only moving elements on the page, the user’s attention lands on your message and then on the action you want them to take.

View the headline fade-in demo

2. Animate page elements in on scroll

Building on the headline fade, you can have content animate into view as visitors scroll down the page. Options range from a simple fade to content flying in from every direction. Stick with the subtle ones, because this is exactly where rules 1 and 2 matter most.

Subtle scroll reveals create a gentle sense of movement and interaction, so each new section feels fresh, which keeps visitors attentive and engaged. We go deeper on this technique in how scroll animations increase conversions.

View the on-scroll effect demo

3. Use progressive page loading

Elaborate loading screens can look beautiful, but no matter how polished they are, they still make users sit and wait. Users don’t like waiting, and if a site doesn’t appear quickly, they’re more likely to give up and go elsewhere.

Progressive page loading is the better option. The page structure and surrounding elements appear right away, while heavier content such as images loads in gradually, often with a progress indicator or placeholder showing that something is happening. Many social feeds and publishing platforms work this way. It gives users the sense that the page is moving forward and gives them something to look at while the rest loads.

View the lazy-loading demo

4. Show the navigation menu when users scroll up

A sticky menu is useful, but its constant presence can distract from the content, which breaks rule 1. On a long blog post or a landing page that walks through features, you want readers focused on the content, not thinking about other pages.

A “back to top” button is one fix, but it doesn’t immediately give people what they’re usually after: the navigation. A better solution is to reveal the menu as soon as the user starts scrolling up and hide it again when they scroll down.

It feels intuitive because scrolling up is often a signal that the reader has seen enough and wants to explore other pages. The menu appears exactly when their behavior suggests they need it.

View the scroll-up navigation demo

5. Use button animations that show progress

Some button animations have a clear functional job. A form’s “Submit” button, or a progress bar on a file upload, can animate into a checkmark once the action completes, confirming that the message was sent or the file uploaded.

This kind of feedback is one of the most useful things motion can do. It reassures users that their action worked and gives them a small sense of accomplishment, instead of leaving them wondering whether they need to click again.

View the circular progress button demo

6. Add hover animations that make buttons more clickable

Hover effects are one of the safest places to get creative, as long as they still pass the checklist. They only run when a user moves their cursor over the button, so they’re tightly controlled and unlikely to disrupt the wider experience.

Users also only see them for a moment before clicking, and a well-designed hover state makes it clear which button they’re about to press and makes it more inviting. Keep in mind that touchscreens don’t have hover, so the button still needs to look clearly clickable without the effect. For more small, purposeful interactions like this, see our guide to microinteractions in UI design.

View the creative button styles demo

7. Animate in an email opt-in at the right moment

Animation can also trigger events that encourage users to act. Rather than showing an email opt-in the moment someone arrives, you can choose the exact point in their journey when it animates into view: after they’ve read a few testimonials, worked through your features or reached a certain depth in a blog post.

Timing an interruption well makes it far more relevant. Two examples:

• Halfway through a blog post: a reader who has scrolled this far probably likes the content and wants more, so it’s a good moment to offer a subscription.
• Deep into a testimonials page: a visitor who keeps reading social proof is likely influenced by it, so an opt-in for an in-depth case study may catch their interest.

Use this one sparingly. A pop-up is a deliberate disruption, so make it easy to close and don’t show it again to someone who has already dismissed it.

View the scroll-triggered opt-in demo

How should you handle animation timing and easing?

Keep interface animations short and use easing so movement speeds up and slows down naturally instead of moving at a constant, mechanical rate. Motion should feel quick enough that users never wait on it, and smooth enough that it reads as one fluid change.

A few practical guidelines:

• Match the duration to the job. Feedback on a click or hover should feel almost instant. Larger changes, like a panel expanding or a page section revealing, can take a little longer so users can follow what moved.
• Use easing, not linear motion. In CSS, timing functions such as ease-out make elements decelerate as they arrive, which feels more natural than linear movement.
• Sequence, don’t stack. As in the headline example, staggering a few elements in a logical order guides the eye. Animating everything at once just creates noise.
• Stay consistent. Use the same durations and easing for similar interactions across the site, so motion feels like part of one system.

If you want a deeper framework, the widely shared “12 principles of UX in motion” are a useful reference for making animations fluid, logical and easy to follow.

How do you keep animations from slowing your site down?

Use fewer, lighter animations, favor CSS over heavy JavaScript libraries where you can, and measure the result. Every effect has a cost, and that cost adds up across a page.

• Animate cheap properties. Transforms (moving, scaling, rotating) and opacity are generally the smoothest properties to animate in the browser. Animating layout properties like width, height or position offsets forces more work on every frame.
• Avoid loading a library for one effect. A simple fade or slide rarely needs a large script.
• Load content progressively. Lazy-load images and below-the-fold content so the first view appears quickly.
• Test on real devices. An animation that’s smooth on a powerful desktop can stutter on an older phone.

Clean, well-structured code makes a big difference here. If you need animations built properly from the start, our front-end development services cover hand-built HTML, CSS and JavaScript that’s tested across browsers and devices.

How do you make animations accessible?

Respect users’ motion preferences with the prefers-reduced-motion media query, and never rely on animation alone to communicate something important. Some people experience dizziness, nausea or distraction from on-screen movement, and many operating systems let users ask for less of it.

When a user has turned on a reduced-motion setting, your site can tone animations down or switch them off:

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; } }

A blanket rule like this is a safety net. It’s better still to decide case by case: replace a large slide or zoom with a simple fade, for example, rather than removing useful feedback entirely. A few other accessibility basics:

• Avoid large parallax effects, auto-playing motion and anything that flashes rapidly.
• Give users a way to pause anything that moves on its own, such as carousels or looping animations.
• Make sure content revealed on scroll is still available to keyboard and screen reader users, and isn’t left invisible if the script fails.
• Pair motion with text or icons. A checkmark animation should come with a clear “Sent” message, for example.

When should you not animate?

Skip animation when it doesn’t guide, inform or confirm anything, when it slows the page or gets in the way of a task, or when it competes with your core message. Static is often the right answer.

• When it’s purely decorative. If you can’t name the animation’s purpose, cut it.
• When it delays the user. Don’t make people wait for an intro animation or loading screen before they can read or click.
• When it’s repeated constantly. An effect that’s charming the first time can become irritating on the twentieth visit, especially on frequently used controls.
• When the content is the star. On long-form articles, checkout flows and forms, extra movement usually just gets in the way.
• When it hasn’t been tested. If you can’t confirm it works across devices and browsers, it’s not ready.

Good motion design is mostly restraint. Pick a handful of animations with clear jobs, build them well and let your content do the rest. For a broader look at designing around users’ needs, see our UI/UX design services.

Frequently asked questions

Do website animations increase conversions?

They can, when they focus attention on your message and calls to action, reduce perceived waiting or confirm that an action worked. Heavy, distracting or slow animations tend to do the opposite, so test the effect on your own site rather than assuming more motion means more conversions.

What is the difference between UI and UX motion design?

UI motion design focuses on individual interface elements, such as how a button or menu animates. UX motion design looks at the whole experience and how it flows from one interaction to the next.

How many animations should a website have?

There’s no fixed number. Use only as many as have a clear purpose, and make sure no animation draws more attention than the content around it.

What is prefers-reduced-motion?

prefers-reduced-motion is a CSS media query that detects when a user has asked their device to minimize motion. You can use it to reduce or turn off animations for those users while keeping the site fully usable.

Want animations that guide visitors toward converting instead of distracting them? Get a free proposal from Hey Reliable and we’ll help you plan and build motion that supports your UX.

Brian Checkovich

Brian Checkovich is a Partner and Finance Manager at Hey Reliable, where he leads financial strategy and plays a key role in day-to-day operations. With a background in finance and experiential marketing, and a degree in Marketing from the Un... read more