About UtilDock

Why this exists

Every developer needs to pretty-print some JSON or work out why two payloads disagree. The tools that come up first for those searches tend to be buried in ads, interrupted by cookie walls, and — most uncomfortably — they often post whatever you paste to a server you know nothing about. That is a bad trade when the thing you are debugging is a production payload.

UtilDock is the opposite of that: a small set of sharp tools, no advertising, no sign-up, and no data leaving your machine.

How it is built

The site is static — HTML, CSS and a little JavaScript, served from Cloudflare's edge. Each tool is a self-contained component that hydrates only on its own page, so the pages you are not using cost you nothing. The heavy work (parsing, validating, diffing) happens in a Web Worker, which is why a multi-megabyte document does not freeze the page while you type.

There is no backend. That is a deliberate constraint: a tool that cannot send your data anywhere cannot leak it. Read the privacy page for the details.

What is here today

• JSON Viewer
• JSON Validator
• JSON Comparator
• JSON Formatter

JSON came first because it is what most of us reach for most often. JWT decoding is next, and the list will keep growing — always under the same rules: fast, free, ad-free, and entirely client-side.