Moving backgrounds for any website, in your colours, from one line of script.

Our moving effects on any website, in your colours: make an embed with one call, paste one script tag, and the effect runs behind your section. 3 credits per embed, then 1 credit per 1,000 page views.

The moving effects behind our own blog and members' pieces, for your pages. Pick an effect (embers, aurora, a flowing current, bubbles, confetti, stardust that follows the pointer and more), pass your colours, and get back a snippet: one script tag, and an attribute on the section it goes behind. Your words stay on top. It pauses when off screen, holds still for visitors who ask for reduced motion, and lowers its own detail on slow devices. Switch an embed off with one call and every copy of the snippet stops.

what you’d build with it

A hero that moves

Put an effect behind a landing page's first section without a designer, a video file or a heavy library.

Site builders and platforms

Offer your users moving backgrounds in their own brand colours: one call makes one embed per site.

Campaign moments

Confetti for a launch week, snow for December: switch it on, switch it off.

example response

POST /api/v1/effects  { "effect": "embers", "colors": ["1f6fe5", "57dbaa"] }

{
  "token": "…",
  "effect": "embers",
  "snippet": "<script src=\"https://meetkatalis.com/fx.js\" async></script>
<div data-katalis-fx=\"…\" style=\"min-height:420px\">…your section…</div>"
  …

Truncated. Full documentation and a downloadable README come with a free account.

every effect, running

embers · Warm sparks rising slowly off a dark ground. Move the pointer through them.

aurora · Soft pools of your colours drifting on a night sky, with a few stars.

flow · Fine lines combed by an invisible current, in your colours.

confetti · Confetti in your colours falling gently. Click to throw more.

snow · Flakes near and far over a cold blue evening.

orbit · Your colours circling a bright centre, like a small galaxy.

bubbles · Clear bubbles rising through soft light. Good for anything clean or calm.

shapes · A few big soft shapes in your colours, floating. Calm and graphic.

dots · A quiet grid of dots breathing out from the centre. Techy without shouting.

waves · Layered waves in your colours along the bottom of the frame.

hearts · Hearts floating up, a few at a time. For thank-yous and anniversaries.

trail · Your pointer leaves a trail of glowing dust. Try it.

paper · Confetti in your colours drifting down a light page. Bright without shouting.

morning · A warm glow on a pale ground, with a little dust drifting in the light.

Loading plans…

Why developers pick it

One line, no build step

A 34 KB script from our CDN; no framework, no video, nothing to host.

Considerate by default

Pauses off screen, respects reduced motion, lowers its own detail on slow devices.

Yours to switch off

One call stops every copy of the snippet within a couple of minutes.

Fair metering

3 credits to make one, then 1 credit per 1,000 views. If the credits run out it pauses, and comes back when the allowance renews. On the free plan a small “Effect by Katalis” link shows; paid plans can remove it.

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