Free online converters

20 converters that run entirely in your browser — free, no signup, no tracking. Part of the Unit & Data group.

• Unit ConverterThis Unit Converter tool converts values across various units. Select your category, input a value, and choose your from and to units.
• Epoch ConverterEpoch Converter — free online tool. Unix time is timezone-free: the same number is the same instant everywhere on Earth. Works on mobile and offline.
• Base64 EncoderBase64 Encoder — free online tool. Base64 makes data safe for text-only channels like email headers and JSON; it is encoding, not encryption, and anyone can reverse it. Works on mobile and offline.
• URL EncoderURL Encoder — free online tool. Encode individual values, not a whole URL — slashes and question marks are separators and must stay literal. Works on mobile and offline.
• Celsius to FahrenheitCelsius to Fahrenheit — free online tool. Fast, private, no signup. Works on mobile and offline.
• KG to PoundsKG to Pounds — free online tool. Fast, private, no signup. Works on mobile and offline.
• CM to InchesCM to Inches — free online tool. Fast, private, no signup. Works on mobile and offline.
• Time Zone ConverterTime Zone Converter — free online tool. Offsets are read from your browser’s own timezone database, so daylight-saving changes are handled for the date you entered — not for today. Works on mobile and offline.
• Roman Numerals ConverterRoman Numerals Converter — free online tool. Only I, V, X, L, C, D and M are used, and a smaller symbol before a larger one subtracts (IV is 4, not 6). Works on mobile and offline.
• Binary to Text ConverterBinary to Text Converter — free online tool. Text is converted through UTF-8 first, so accented characters and emoji take more than one byte and each byte becomes its own eight-digit group. Works on mobile and offline.
• HEX to RGB ConverterHEX to RGB Converter — free online tool. FF is 255 and 00 is 0, so #000000 is black and #FFFFFF is white. Works on mobile and offline.
• Kilometer to Mile ConverterKilometer to Mile Converter — free online tool. Fast, private, no signup. Works on mobile and offline.
• Unix Timestamp MillisecondsUnix Timestamp Milliseconds — free online tool. Unix time is timezone-free: the same number is the same instant everywhere on Earth. Works on mobile and offline.
• RGB to HEX ConverterRGB to HEX Converter — free online tool. FF is 255 and 00 is 0, so #000000 is black and #FFFFFF is white. Works on mobile and offline.
• Mile to Kilometer ConverterMile to Kilometer Converter — free online tool. Fast, private, no signup. Works on mobile and offline.
• ISO Date ConverterISO Date Converter — free online tool. Unix time is timezone-free: the same number is the same instant everywhere on Earth. Works on mobile and offline.
• Meter to Foot ConverterMeter to Foot Converter — free online tool. Fast, private, no signup. Works on mobile and offline.
• Centimeter to Inch ConverterConvert centimeters to inches or inches to centimeters. Enter your value, select units, and get instant results. Accurate and free.
• PNG to JPG Converter
• JPG to WebP ConverterJPG to WebP Converter — free online tool. Fast, private, no signup. Works on mobile and offline.