Free Online Converter & Calculator Tools
Free calculators and converters. Everything runs in your browser — no input is ever sent to a server, no tracking, no accounts.
Dev Tools
Base64, hashing, GUIDs, JSON, RegEx, Cron, and more — 18 free tools for developers.
Unit Converters
Length, weight, temperature, speed, pressure, energy, and more — 14 free converters.
Energy & Home
Electricity costs, solar yield, heat pump calculators. Coming soon.
Construction & Renovation
Tile, paint, and material need calculators. Coming soon.