About AppCafe Tools

AppCafe Tools is a free, no-login collection of 60+ online tools — everyday calculators (EMI, SIP, GST, BMI), business document generators (invoices, quotations, payslips), and a full developer toolbox (JSON, SQL, XML & HTML formatters, CSV/YAML converters, color picker, regex tester and more) — built for quick, accurate answers without ads getting in the way. Every tool works offline once loaded, as an installable PWA.

🚀 More from AppCafe

Beyond this tools site, AppCafe also builds dedicated apps for specific needs:

⚙️ How it works

Every calculator and converter runs entirely as client-side JavaScript in your browser — there's no server-side processing and nothing you type is ever uploaded. Pages are cached locally via a Service Worker, so once you've visited a tool, it keeps working even without an internet connection.

Because everything runs locally, results are instant — no spinners, no network round trips, and no rate limits.

📱 How to use it

• Pick a tool from the navigation menu, organised by category (Finance, Business, Education, Developers, Text & Web, Health, Utilities)
• Enter your values — most tools offer quick-select presets for common inputs to save typing
• Get instant results with breakdowns, charts, or tables depending on the tool
• Share results via the Share button, which encodes your inputs into a link you can send to others
• Install as an app — use "Add to Home Screen" (mobile) or the install icon in your browser's address bar (desktop) for offline, app-like access

💰 Finance

💼 Business

🍽️ Personal

🏫 Education

📝 Text & Web

💻 Developers

❤️ Health

🧰 Utilities