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Video renders the loop frame by frame on your tempo (MP4, 60 fps), so it cuts cleanly on the bar. 4K, 6K, CSS and live embed code come with Pro.
About
gr4dient is a free gradient generator that runs in your browser. Build mesh gradients from up to five colours, switch to flowing, folded or light-beam modes, add grain or dither, and export a PNG or a looping MP4 for backgrounds, slides, social posts and websites.
Motion is tied to tempo: set the BPM and the number of bars, and the loop ends exactly on the bar, so it cuts cleanly to music. No sign-up, nothing is uploaded, the link keeps your settings.