Toolstack is a collection of free, fast online tools for everyday tasks — calculators, PDF utilities, image tools, text tools, developer tools, and converters. Every tool runs directly in your browser, so your files and data are never uploaded to a server.
Most everyday tasks like resizing an image, converting a PDF, or checking a word count shouldn't require installing desktop software, creating an account, or waiting for an upload to finish on a slow connection. Toolstack exists to make these small, common tasks fast, free, and available from any device with a browser, whether that's a laptop at work or a phone between errands.
We started with a simple frustration: needing a quick calculator or converter and instead landing on a page cluttered with popups, forced sign-ups, or software downloads for what should be a ten-second task. Every tool on this site is built to do one job well, load quickly, and get out of your way once it's done.
Wherever technically possible, tools run entirely in your browser using JavaScript, rather than uploading your files or text to a server. This means your data — a personal document, a photo, or text you're editing — generally stays on your own device throughout the process rather than passing through our servers. It also means the tools work quickly, since there's no upload or server processing delay for most operations.
We maintain and expand this toolset over time, adding new tools based on the kinds of everyday tasks people search for, and refining existing ones based on how they're actually used.
Toolstack is supported by advertising, which is what allows every tool to remain free to use with no signup, subscription, or usage limits. We aim to keep ad placement reasonable and non-intrusive so it doesn't get in the way of actually using the tools.
If you run into a bug, have a suggestion for a new tool, or just want to say hello, visit our contact page. We read every message.