About WebUtil.io

What Is WebUtil.io?

WebUtil.io is a collection of free, fast, browser-based tools for developers, designers, and anyone who works with data on the web. From formatting JSON to generating UUIDs, comparing text diffs to decoding JWTs — every tool runs entirely in your browser with zero server round-trips.

Our Philosophy

Privacy First

Every tool on WebUtil.io processes your data client-side using JavaScript. Your input never leaves your browser — there are no API calls, no data uploads, no server-side processing. This means you can safely use our tools with sensitive data, API keys, tokens, and production code.

No Account Required

There's nothing to sign up for. No login, no email harvesting, no tracking profiles. Just open a tool and use it.

Fast and Lightweight

We build with vanilla JavaScript — no heavy frameworks, no bloated dependencies. Pages load fast and tools respond instantly, even on slower connections.

Free and Ad-Supported

All tools are free to use. We sustain the site through non-intrusive advertising. We will never gate features behind a paywall or force you to disable your ad blocker.

Available Tools

We offer a growing collection of tools across multiple categories including developer utilities, text processing, and math/conversion tools. Check the homepage for the full directory.

Built With

• WordPress with the GeneratePress theme
• Vanilla JavaScript (zero framework dependencies)

Get in Touch

Have a suggestion for a new tool? Found a bug? Just want to say hello? Visit our contact page.