About DevToolbox

DevToolbox is an independent collection of free developer utilities in the developer & technical utility tools space. Every tool runs entirely in your browser using standard web APIs — there is no account, no upload, and nothing you paste is sent to or stored on a server. The site is built as static pages, so the tools load fast and keep working offline once opened.

What we do

We build small, focused, genuinely-useful tools that developers reach for during everyday work: encoding and decoding, formatting and validating, generating identifiers, and converting between formats. Each tool does one job well and explains exactly how it works.

How it works

All computation happens client-side in JavaScript using documented browser APIs — for example the Web Crypto SubtleCrypto API for hashing and crypto.randomUUID() for UUIDs. Because there is no backend processing your data, your input stays on your device. See the methodology for the specific API behind each tool and its known limits.

Privacy

We do not collect, transmit, or store the text you enter into any tool. Optional, cookieless analytics may count page views, but never the contents of a tool. Read our privacy policy for details.

Contact

Found a bug or have a tool to suggest? Get in touch.