Number tools
Binary, octal, decimal and hex conversion, bitwise math, IP conversion and number words.
- All Base Converter Enter one number and see it in decimal, binary, octal, hexadecimal, base 36, Roman numerals and English words.
- AND Calculator Work out a bitwise AND between two or more values and see exactly which columns survived.
- Binary to Decimal Convert binary (base 2) numbers to decimal.
- Binary to Hex Convert binary (base 2) numbers to hexadecimal.
- Binary to IP Address Convert four 8-bit binary octets back into a dotted IPv4 address.
- Binary to Octal Turn binary words into octal, one value per line, with an optional reference table.
- Bitwise Calculator Perform bitwise AND, OR, XOR, NOT and bit shifts, with the result shown in decimal, binary and hex.
- Byte to ASCII Converter Paste a run of byte values in any base and read the characters they stand for.
- CIDR / Subnet Calculator Enter a CIDR block and get the netmask, network and broadcast addresses, host range and usable host count.
- Decimal to ASCII Converter Turn a list of decimal numbers back into the characters they represent, as code points or as raw bytes.
- Decimal to Binary Convert decimal numbers to their binary (base 2) representation.
- Decimal to Fraction Convert decimal numbers to fractions in lowest terms.
- Decimal to Hex Convert decimal numbers to hexadecimal (base 16).
- Decimal to IP Address Convert a 32-bit decimal integer back into a dotted IPv4 address.
- Decimal to Octal Convert decimal numbers to octal (base 8).
- Decimal to Roman Numerals Convert numbers from 1 to 3999 into Roman numerals.
- Fraction to Decimal Convert fractions to their decimal value, one per line.
- Hex to Binary Convert hexadecimal (base 16) numbers to binary.
- Hex to Decimal Convert hexadecimal (base 16) numbers to decimal.
- Hex to Octal Convert hexadecimal values into octal, with big values handled exactly.
- IP Address to Binary Convert an IPv4 address to binary, each octet shown as eight bits.
- IP Address to Decimal Convert an IPv4 address to its single 32-bit decimal integer, one per line.
- IP Address to Hex Convert an IPv4 address to its hexadecimal form.
- IPv6 Compressor Compress a full IPv6 address to its shortest valid form.
- IPv6 Expander and Compressor Expand a shortened IPv6 address to its full, eight-group form with every group padded.
- NAND Calculator Compute a bitwise NAND, the inverse of AND, and see every column of the word laid out.
- NOR Calculator Compute a bitwise NOR and see which columns were empty in both operands.
- NOT Calculator Invert every bit of a number and see the ones complement at the word size you choose.
- Number Base Converter Convert numbers between binary, octal, decimal and hexadecimal, one per line, with big-integer support.
- Number Formatter Format numbers with thousands separators and decimals, for the locale of your choice.
- Number Sorter Paste numbers in any layout and get them back in order, with duplicates dropped if you like.
- Number to Words Convert numbers into written English words, with international or Indian numbering and optional currency wording.
- Octal to Binary Expand octal values into their binary bit patterns, one line at a time.
- Octal to Decimal Convert octal (base 8) numbers to decimal.
- Octal to Hex Convert octal values to hexadecimal with control over case and prefixes.
- OR Calculator Merge two numbers with a bitwise OR and watch each flag switch on in the bit layout.
- Percentage Calculator Work out a percentage of a number, one number as a percentage of another, and the change between two.
- Prime Number Generator List every prime between two numbers, the first N primes, or a random handful, with the totals worked out for you.
- Reverse Hex Flip a hex string end to end by byte, nibble or word to move between big endian and little endian.
- Roman Numerals to Decimal Convert Roman numerals into ordinary numbers, with validation of the numeral form.
- Scientific Notation Converter Convert numbers to scientific (E) notation, with the plain decimal value shown alongside.
- Unix Permission Calculator Convert between octal and symbolic Unix file permissions and see what each one grants.
- Words to Number Convert English number words back into digits, one per line.
- XNOR Calculator Compare two numbers bit by bit and get a 1 in every column where they agree.
- XOR Calculator Exclusive OR two values and see which columns disagreed, with the answer in four bases.
Other categories
- JSON tools
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- Code formatters
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- Data converters
- Encoders and decoders
- Escape and unescape
- Hash and cryptography
- String and text tools
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- Unit converters
- Date and time tools
- Generators
- Random data generators
- Image tools
- Compress and decompress
- Network and DNS tools
- Web and developer tools
- Chart makers
- Cheat sheets
- Fun text tools
- Calculators