Lemr - AI Thumbnail Generator

AI Tools Builtfor Creators.

Generate professional YouTube thumbnails with AI, and remove backgrounds in 4K — all free, all in your browser.

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Thumbnail AI

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✦ Two Powerful Tools

Everything you need.

Professional results in seconds — no accounts, no uploads, no limits.

Sketch your idea on a canvas, describe your video, and get a professional YouTube thumbnail in 60 seconds. Powered by Gemini Vision + Flux.

Select any clothing item in your photo and change its color instantly with AI. Perfect for maintaining consistent branding in thumbnails.

Remove backgrounds from any image in 4K resolution. 100% free, fully processed locally in your browser — no data ever leaves your device.