Photopea

Photopea is a powerful image editor that runs entirely in your browser and closely mirrors Adobe Photoshop. It supports layers, masks, blend modes, and smart objects, and can open and export PSD, XCF, Sketch, PDF, and standard image formats.

Because it needs no installation and no account, it is a popular free alternative for retouching photos, designing graphics, and editing existing PSD files. It is supported by unobtrusive ads, with an inexpensive premium tier to remove them.