How can I build a webpage with nine GIFs and individual frame sliders?

Just to confirm: you want nine animated images, with one slider per image, so each slider can independently move its image to a selected frame or moment? If so, the main challenge is not creating the sliders but controlling the animation frames. Standard HTML range inputs are straightforward, but GIFs do not normally expose an easy frame-seeking API. Converting each animation into separate frames or a video will make this much easier.

HTML can create the nine range sliders, and CSS can style them. JavaScript should listen for each slider’s input event and update the corresponding image whenever the slider moves. You could give all sliders the same class, select them with document.querySelectorAll(), and connect each one to the GIF or image it controls in a loop. For example, each slider could have a matching image index, and its value could determine which frame to display. Keep in mind that directly seeking to individual frames in a normal animated GIF is difficult in the browser. You may get better control by converting the GIFs into frame images or short videos, then using the slider value to choose a frame or set the video’s currentTime.

Yes, exactly. The page would have nine GIFs and nine sliders, with each slider controlling the moment shown for its own GIF.