28 free tools for developers, founders, and marketers.
Dev utilities, SEO tools, and business calculators — every tool runs entirely in your browser. No server calls, no tracking, no account required.
Whether you need to format JSON, decode a JWT, generate a secure password or UUID, build a sitemap or robots.txt, clean up Word content into HTML, or estimate what a custom software project should cost, it's here — and it works instantly, offline, on desktop or mobile. Because everything executes client-side in JavaScript, nothing you paste is ever uploaded, logged, or stored: your data never leaves the tab. We built these as the same utilities our own team reaches for on client projects, then made them free for everyone. Pick a category below to get started, or explore all 28 tools.
Developer tools
Cryptography, encoding, identity, scheduling, and data format converters — all browser-side.
SEO & content tools
Meta tags, schema markup, sitemaps, robots.txt, and AI prompt structuring — built for technical SEO and launch readiness.
Business calculators
Build your business case — estimate software costs, calculate automation ROI, and decide whether to build or buy.
Need something built, not estimated?
ruxox builds custom web apps, APIs, automation tools, and AI-powered software for growing businesses. Free scoping estimate within 48 hours.