About thedevtoolset

thedevtoolset is a growing collection of small, focused utilities for web and mobile developers — the kind of tool you reach for mid-task, use in ten seconds, and close.

Every tool here follows the same principles: it does one thing, it's free, and it runs entirely in your browser. Nothing you type is uploaded to a server — there's no backend to send it to. That makes the tools fast, private, and usable offline once the page has loaded.

Why another tools site?

Most "developer tool" pages are buried under sign-up walls or sprawling all-in-one dashboards that make you dig for the one thing you actually need. The goal here is the opposite: a clean, fast page per task, with a short, practical guide next to each tool so you can understand thewhy, not just the what.

How the tools are built

Every page is static — there's no server rendering a response per request, and no account system to maintain. The interactive part of each tool is a small, focused piece of code loaded only where it's needed, built with native browser APIs (like Intl, URL, and the Clipboard API) wherever the browser already does the job, instead of pulling in a heavier library. Fonts are self-hosted, so loading a page never triggers a request to a third-party font service. The whole site is also held to the WCAG AA standard our own color contrast checker measures, in both light and dark themes.

How the guides are written

Every guide is written and reviewed by a person before it's published — not generated and posted unedited. Formulas and specifications are checked against primary sources (MDN, the W3C, and the relevant platform's own docs, whether that's Apple's Human Interface Guidelines or Android's density documentation) rather than copied from other tool sites. Each tool page shows an "Updated" date, and if you spot something wrong, let us know and it'll be corrected.

How this site is funded

Every tool is free and will stay free. The site is supported by display advertising through Google AdSense, which is what pays for the domain and the time to keep building. We don't sell your data — there isn't any to sell, since no tool sends what you type anywhere. What advertising cookies do, and how to opt out of them, is covered in ourPrivacy Policy.

New tools are added regularly. If there's one you'd like to see,get in touch.