Under-eye concealer is the behind-the-scenes workhorse of the makeup world. You only notice it when it's not doing its job. The best under-eye concealer needs to cover up dark circles and brighten tired eyes — without creasing or settling into fine lines. Unfortunately, finding a truly crease-free concealer is much harder than you'd think.

Creaseless concealers don't always live up to their claims, leaving women with mature skin or crow's feet with frustratingly few options. So we road-tested dozens of the best concealers to bring you this definitive list. Behold, the best concealers that last all day, crease-free.

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The Product: Nars Radiant Creamy Concealer, $29

This concealer is a favorite among makeup artists like Lisa Eldridge, and for good reason — the creamy, pigmented formula covers up dark circles and blurs the appearance of lines and wrinkles without looking like an obvious cover-up job, and only the smallest dab is needed for all-day coverage. It brightens skin without reflecting light for a seamless, natural finish. It comes in 10 shades that range from the ultra-fair to deep with gold and brown undertones.

The Product: Flower Beauty Lighten Up Brightening Concealer, $7.98

The consistency of this made-in-the-U.S. concealer pen was a bit heavier than expected coming out of the tube, but blended out easily into a lightweight, skin-perfecting veil. Just be sure not to over-apply — you'll know you have if creases show up immediately. Simply pat away the excess and you'll be left with light, natural-looking coverage that lasts for at least eight hours.

The Product: Urban Decay Naked Skin Weightless Complete Coverage Concealer, $28

Urban Decay expanded their best-selling Naked line to include this lightweight concealer. The high-tech formula contains peptides and green tea that help improve the appearance of skin while covering it up. A hydrating blend of a lychee complex sodium hyaluronate ensures that skin doesn't dry out and keeps the medium- to full-coverage concealer from looking cake-y or settling into lines.

The Product:Maybelline New York Instant Age Rewind Eraser Dark Circles Concealer + Treatment, $8.99

This dark circle-neutralizing concealer is easy to apply, thanks to the spongy applicator. The formula itself is lightweight, so it feels like a powder, but gives the coverage of a creamier concealer. The best part? This under-$10 find can stand up to an entire workday without creasing.