Convert. Decode.
Calculate.
60+ free online tools for binary conversion, encoding, Morse code, math calculations, and more. Fast, accurate, and beautifully simple.
All Tool Categories
Choose a category to explore our comprehensive collection of conversion and calculation tools.
Base Number Converters
Binary, Decimal, Hex, Octal — convert between number systems instantly.
Encoding & Decoding
Base64, URL, HTML encoding and decoding tools for developers.
Morse Code Tools
Convert text to Morse code and back. Complete alphabet charts included.
Math & Fraction Tools
Decimal to fraction, simplifier, percentage converters and more.
Scientific & Statistics
Standard deviation, significant figures, scientific notation tools.
Angle Converters
Convert between degrees, radians, and DMS format easily.
Roman Numerals
Convert numbers and dates to Roman numerals. Complete reference chart.
PPM & Concentration
Parts per million, PPB, percentage concentration calculators.
Reference Guides
ASCII table, binary alphabet, hex chart, and number system guides.
Instant Results
Real-time conversion as you type. No waiting, no page reloads.
100% Free & Private
All conversions happen in your browser. Nothing is sent to any server.
Developer Friendly
Copy results, download files, and use keyboard shortcuts for speed.