QuickDevKit is a collection of the everyday utilities developers reach for between bigger tasks: counting and reshaping text, formatting and diffing JSON, encoding and decoding, generating IDs and hashes, and testing regular expressions. Each one is built to do a single job well and load instantly.
Who builds QuickDevKit
QuickDevKit is built and maintained by one independent developer — not a company or a content farm. The tools and the guides come straight out of everyday development work; each page is written from hands-on experience and checked against the browser's own APIs, rather than copied from elsewhere or generated in bulk. When a result is wrong or a guide could be clearer, the person who built the site is the one who fixes it.
What this site is built around
- Private by default. Every tool runs as JavaScript in your browser. Whatever you type or paste stays on your device — it is never sent to a server, logged or stored. You can confirm this in your browser's Network tab.
- No friction. No sign-up, no paywall, no "create an account to continue". Open a tool and use it.
- Fast and lightweight. Pages are small and the work happens locally, so results are instant and most tools keep working even with a flaky connection.
- Honest about limits. Where a tool has an edge case — emoji counting as two characters, arrays diffing by index, Base64 not being encryption — we say so on the page instead of pretending it away.
Built on the browser's own engine
Rather than reinventing things, the tools lean on well-tested native browser APIs: JSON.parse for JSON validation, TextEncoder for accurate UTF-8 byte counts, the Web Crypto API (crypto.subtle) for SHA hashing, crypto.randomUUID for cryptographically random identifiers, and the standard RegExp engine for the regex tester. That keeps results correct and consistent with what you'd get in your own code.
Found something off?
These tools are maintained and refined over time. If a result looks wrong, an edge case is missing, or a guide could be clearer, that feedback is genuinely useful — email hello@quickdevkit.com and it'll be looked at.
Advertising
QuickDevKit is free and supported by advertising. Ads are clearly separated from the tools, and you're asked for consent before any advertising cookies are set — see the privacy policy for the details and how to decline.