The Girl with a Hammer is the online upholstery school and learning platform founded by Céline Vanier, a French professional upholsterer based near Lake Annecy. Drawing on more than 15 years of experience, Vanier shares the practical guidance she wished she had when beginning her craft and upholstery business, Le Boudoir des Étoffes. The platform supports learners from their first upholstery projects through to more advanced work, with more than 80 step-by-step video tutorials, photo guides, professional tips, and a support forum.

Topics include stripping and preparing furniture, webbing, springs, padding and stuffing, covering, sewing, and finishing. Learning resources also cover upholstery tools, materials, and terminology, alongside complete projects involving stools, chairs, bergère chairs, and sofas. For in-person instruction, Vanier offers intensive classes at her Annecy atelier, including five-day courses for small groups of up to four students, where participants restore a chair from frame to finish.

Membership provides online tutorials and monthly content updates, helping upholstery enthusiasts learn at their own pace using traditional and modern professional methods