Free Online Converters
Free online converters that turn one thing into another in seconds — temperatures, encoded text, and more. Each one runs instantly in your browser, with no sign-up and nothing stored. Pick a converter below to get started.
Celsius to Fahrenheit
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly, with the formula shown.
Convert NowBase64 Encoder & Decoder
Convert text and files to Base64 and back — encode or decode instantly, with URL-safe mode.
Encode / Decode