The 4 best essential oil diffusers of 2026, tested and reviewed

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The best essential oil diffusers are easy to use and clean, with large water tanks and extra features like timers and lighting.

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Whether you're getting into aromatherapy or want a signature scent without the open flame of the best candles, the best essential oil diffuser naturally and safely spreads fragrance through your space. There are two main types of diffusers: ultrasonic and nebulizing.