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✨ Now includes Alex, an AI assistant — ask any conversion in plain English

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About Unit Convert All

Built by Cosyslabs — making conversions effortless

Our Mission

Unit Convert All exists to make every unit conversion instant, accurate, and free — forever. Whether you're a student converting Celsius to Fahrenheit, an engineer calculating torque, a chef measuring cups to grams, or a traveller checking exchange rates, we've built the fastest and most comprehensive converter on the internet.

What We Offer

  • 40+ converters — temperature, currency, distance, weight, area, volume, time, data, colour, and more
  • Alex AI assistant — ask any conversion in plain English; Alex understands context
  • Offline-first PWA — install on any device and convert without an internet connection
  • Privacy by default — no account required, analytics only with consent, all conversions happen in your browser
  • Multi-language — available in English, Spanish, French, German, Portuguese, and Chinese

Who We Are

Unit Convert All is built and maintained by Cosyslabs Inc., a software company dedicated to building high-quality, user-first tools. We believe great utilities should be free, fast, and respectful of your privacy.

We're a small team passionate about developer tools, user experience, and the open web. Unit Convert All is our flagship product, trusted by students, engineers, cooks, travellers, and professionals worldwide.

AI-Powered Conversions

Unit Convert All includes Alex, our AI assistant that understands natural-language conversion requests. Alex is powered by a failover chain of large language models (Gemini, Groq, OpenRouter) with an offline parser fallback so it always works — even without a network connection.

We also expose a Model Context Protocol (MCP) server at mcp.unitconvertall.com/mcp so AI assistants like Claude and ChatGPT can use our converters as tools. Learn more on the Developers page.

Open, Standards-Based Tech

Unit Convert All is built on React, TypeScript, and Vite with full static site generation — every page is pre-rendered for instant load times and perfect SEO. All 40+ converters run entirely in your browser with no server required.

Contact Us

Questions, bug reports, or feedback? We'd love to hear from you.