Zoyku is a collection of free online tools that run entirely in your browser. There is no backend: files you open, text you paste and numbers you enter are processed by JavaScript on your own device.

That design gives us three properties we care about. It is private by construction — there is nothing to upload, so nothing can leak. It is fast — there is no round trip to a server. And it is honest — every tool does exactly what the page says, no tricks.

The tools are grouped into PDF, image, text, developer, SEO, security and utility categories. New tools are added regularly; if a tool would be better designed differently from the usual pattern, we design it that way.