@Mr Smartypants and @Robert J are right. Try GIMP. It is the best alternative to Photoshop. It has similar features just like Photoshop and is capable of performing any kind of image editing tasks.

GIMP Downloading Link:

http://www.gimp.org/

GIMP Tutorials Link:

http://www.gimp.org/tutorials/

GIMP Manual Link:

http://docs.gimp.org/2.8/en/

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If you need an online image editor then try Pixlr. It is quite similar to Photoshop but still lacks some of the important tools and can perform most of the image editing work. Here is a link

https://pixlr.com/

GIMP - GNU Image Manipulation Program. It has a lot of the functionality of Photoshop, and it is not only free, it's open source, meaning there's no malware or other funny business.

www.gimp.org

Try Paint.net. It's smaller than Gimp and easier to learn. Get at http://www.getpaint.net/

Gimp.

http://www.gimp.org/

why don't you just download a pirated version of photoshop you like

GIMP