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Umbra
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Umbra
Move the light, and Umbra casts the CSS shadow.
Umbra is a photo-studio for CSS box-shadows: drag a studio light around an object and watch it cast a natural, three-layer shadow that updates in real time, then copy the exact CSS. Tune elevation, softness, opacity and color, switch between drop and inset, and start from curated presets like Floating, Long dusk or Sharp. Built end-to-end with AI, it runs entirely in your browser with no login, and the whole single-file source is downloadable to self-host or remix.
Built with Claude CodeNo login requiredFree to tryVerified workingOpen sourceDeveloper Tools
#css#box-shadow#design#frontend#ui#generator
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Generated launch trailer
Every build gets a 10-second trailer.
AIBuilt generated this launch kit automatically from /apps/umbra. No uploads, no editing — point us at the build and ship.
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Own it. Remix it. Ship it.
This launch ships its complete source as one self-contained HTML file. No build step, no backend, no strings attached.
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Single-file source — MIT licensed.
Download source (.html)Self-host
- 1. Download the file
- 2. Drop it on any static host (Vercel/Netlify/S3/your server)
- 3. Done — zero dependencies.
Remix with AI
Paste it into Claude, ChatGPT or Cursor together with the downloaded file.
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