If you want to quickly open a PSD file without Photoshop, Photopea is your best bet. It's free and works in your browser. It looks and feels like Photoshop, and lets you save files back to your ...

To get started with Photopea, select whether you want to create PSD file or image or edit. According to your requirement, press either Ctrl+O or Ctrl+N. It is also possible to open a file from a URL.