All Categories

Browse 50+ free tools organized by category. Each group collects related utilities so you can move between, say, formatting JSON and validating a JWT, or resizing an image and stripping its metadata, without hunting through a flat list.

Most ZeroUtil tools run entirely in your browser, which means the text, files, and numbers you work with are never uploaded. The few tools that need heavier processing, such as video and audio conversion, run on a small server that deletes your files shortly after the job finishes, and each of those pages says so up front. Pick a category below to see every tool in it along with a short guide to what it does and when to reach for it.