About Shift Box

Why I built this

As a developer and designer, I ran into the same routine tasks every day: generate a proper robots.txt, build llms.txt for AI crawlers, calculate ROI, or check structured data.

Most tools online are either cluttered with banners, ask for your email, or run on outdated code and feel slow. I got tired of it. So I built the set of tools I wanted for myself and opened free access for the whole community.

Three core principles of Shift Box

Privacy first

Privacy-First

All computation, code generation, and file parsing happen locally in your browser. Your texts, numbers, and business data never leave your device or get sent to our servers.

Zero delay

Zero Latency

Your time matters. Shift Box tools are built on a modern, lightweight stack with no heavy databases. No loading screens — you get results the moment you click.

Independence

Bootstrapped

This project is run by one person, not a board or investors pushing aggressive monetization. So there's no need to squeeze money out of you. Core SEO tools and calculators will stay free and open.

Open to dialogue

The project is growing. If you need a specific calculator, found a bug, or want to discuss B2B partnership — reach out. I read every message.

What Shift Box offers

The platform brings together free micro-tools for everyday tasks of webmasters, marketers, and B2B professionals. Everything runs in the browser — no installs or sign-up.

Technical SEO and content: robots.txt and Sitemap builder, hreflang generator, Google SERP simulator, keyword density analysis, text typographer.

Structured data and previews: JSON-LD generator, Open Graph and Twitter Card visualizer, llms.txt generator for AI crawlers, structure validator for AI Overviews.

Calculators and documents: ROI, margin and markup, VAT, ad metrics, invoice and proposal generators, UTM builder, QR codes, email signatures, and privacy policy generator.

View all tools

Frequently asked questions

Is it really free?

Yes. All listed tools are free and require no registration. We may add premium features or separate B2B products later, but the core set will stay free.

Where do my data go?

Nowhere. Calculations, code generation, and text processing run locally in your browser. We do not store your input, numbers, or files on our servers.

Can I use this in commercial projects?

Yes. Generated documents, markup, and calculation results are yours. Use them in your projects, for clients, and internally. See the Privacy Policy for full terms.

How do I suggest a new tool or report a bug?

Email hello@shift-box.com or message via Telegram (link in the contacts block below). Ideas and bug reports are welcome.