CruxDev.tech
300+ free browser-based developer utilities and engineering courses with zero-server tracking and 100% client-side privacy.
A startup from Davanagere, India.
300+ free browser-based developer utilities and engineering courses with zero-server tracking and 100% client-side privacy.
A startup from Davanagere, India.
This page is designed to help you find out whether CruxDev.tech is good and if it is the right choice for you.
CruxDev is an all-in-one developer toolbox and technical learning platform featuring over 300+ browser-based utilities and 70 engineering courses.
Listed in
Zero-Server Architecture
All calculations, encodings, and data processing execute 100% locally in your browser. Confidential code, API tokens, and JSON payloads are never transmitted to any server.
300+ Developer Utilities
Comprehensive client-side toolset including JSON formatters, JWT decoders, regex testers, UUID generators, color palettes, and CSS studios.
AI Prompt & Token Cost Estimator
Accurate token counters and real-time cost estimation across leading LLM architectures including GPT-5, Claude, Gemini, and DeepSeek.
Web Cryptography Suite
Client-side cryptographic hash generation (SHA-256, MD5, Keccak), HMAC calculation, symmetric encryption, and key generation using standard Web APIs.
Code & Data Converters
Instant format conversions between JSON, YAML, TOML, XML, CSV, TypeScript interfaces, and Docker Run commands to Docker Compose.
No Sign-up Required
Full, unrestricted access to every utility and calculator without account creation, API keys, or subscriptions.
Offline PWA Capability
Lightweight Progressive Web App that caches locally, allowing developers to use tools even without an active internet connection.
CruxDev Academy
Curated technical curriculum featuring 70 engineering courses covering distributed systems, systems architecture, backend scaling, and full-stack development.
CruxDev combines over 300+ essential developer utilities with a comprehensive 70-course engineering academy in a single unified workbench. Crucially, it operates on a strict zero-server privacy architecture: all transformations, cryptography, formatting, and file processing happen 100% locally inside the user's browser using Web APIs and WebAssembly. Sensitive code snippets, JSON payloads, and API tokens never leave the device.
Most developer utility websites are fragmented, ad-heavy, or silently transmit sensitive payloads to remote backend servers. Desktop alternatives require heavy downloads and platform-specific installations. CruxDev delivers an instant, lightweight web and offline PWA experience across any operating system with zero sign-ups, guaranteed data isolation, and modern features like LLM token cost modeling that legacy toolkits lack.
The primary audience consists of software engineers, full-stack developers, DevOps engineers, cloud architects, cybersecurity analysts, and technical students. It is especially suited for developers handling confidential payloads, API secrets, database schemas, and cryptographic keys who require reliable utilities that adhere to strict zero-trust privacy standards.
CruxDev was created out of the frustration of constantly juggling dozens of scattered single-purpose utility websites for daily programming tasks—formatting JSON on one site, decoding JWTs on another, generating hashes on a third—and worrying whether those servers were logging company data. It was engineered from the ground up as a fast, all-in-one developer companion where all processing remains strictly client-side.
React, TypeScript, Vite, Tailwind CSS, Web Cryptography API, WebAssembly (Wasm), Canvas APIs, and Cloudflare Pages edge hosting.
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Check the traffic stats of CruxDev.tech on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
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Check the "Domain Authority" of CruxDev.tech on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
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