14+ instant developer tools, interview-ready courses (JavaScript, React, C++) and practical guides — all free, all in your browser.
Beginner-to-advanced courses with code examples, common mistakes and real interview questions for every topic.
Practical guides on Angular, JavaScript, JWT, regex and modern web tooling — written for working engineers.
TheCodersClan is a privacy-first developer utility platform offering 14+ free, browser-based tools for software engineers, full-stack developers and DevOps professionals. Every tool works completely offline — your data never leaves your browser. On top of that, we publish in-depth, free programming courses and practical engineering guides that prepare you for real interviews.
Use our JSON Formatter to debug API responses, the JWT Decoder to inspect Bearer tokens during auth debugging, and the Regex Tester to validate input patterns before shipping them. Generate cryptographically strong credentials with the Password Generator, hash strings with the Hash Generator for ETags or checksums, and encode binary data with Base64. Working on resumes? The Resume ATS Score Calculator estimates how applicant tracking systems will read your CV.
Beyond tools, we offer free interview-ready courses for the most asked-about stacks. Start with Programming Fundamentals in C++ (32 topics — pointers, OOP, STL, complexity), advance to JavaScript (13 topics including closures, async/await, the event loop), then dive into React (13 topics covering hooks, context, performance). Every topic ends with real interview questions and common mistakes.
Deep, opinionated writeups: a full breakdown of Angular 21 with .NET 9 examples, JWT security best practices, a regex cheat sheet for validation and more.
Yes — every tool, course and guide on TheCodersClan is free with no sign-up, no usage limits and no paywalls. The site is supported by occasional ads that are kept unobtrusive.
Nothing leaves your browser. Every tool runs 100% client-side using native browser APIs. We do not have an API server that processes your data — there is nothing to upload, log or leak.
No. There are no accounts, no email collection and no tracking cookies beyond essential ones. Open any tool, course or article and start using it immediately.
Programming Fundamentals in C++ (32 topics covering pointers, OOP, STL, templates and complexity), JavaScript (13 topics from variables to async/await and closures) and React (13 topics covering hooks, context, suspense and performance). More are on the roadmap.
Every topic ends with 4–6 real interview questions tagged by difficulty (Beginner, Intermediate, Advanced) with answers — directly modeled on what product and service companies ask in technical rounds.
Once a tool page is loaded, the tool itself runs offline because the logic ships as JavaScript to your browser. The course content and blog posts require an initial network request to load the page.
No native app — the site is built as a fast, responsive web app with full mobile support. It works the same on phones, tablets and desktops.