About Toolzuki

Simple, fast, private tools for everyday tasks.

Toolzuki is a collection of free online utilities — PDF tools, image tools, text tools, calculators, converters and generators. Every tool is built with plain HTML, CSS and JavaScript and runs completely inside your web browser.

How it works

When you open a tool, your browser downloads a small page and, if needed, an open-source library such as pdf-lib or PDF.js. The file you choose is read directly from your device's memory and processed there. The result is handed back to you as a download. At no point is your file transmitted to Toolzuki or any third party.

Why browser-only?

Privacy: confidential documents never leave your computer.
Speed: no upload or download queue — processing starts instantly.
Reliability: once a tool has loaded it keeps working even if your connection drops.

Open source libraries

Toolzuki stands on the shoulders of excellent open-source projects, including pdf-lib (MIT), PDF.js (Apache 2.0) and JSZip (MIT).