π» Computer Science & Programming Calculators
Utilities for programmers, network engineers and students. Everything runs locally in your browser β text you enter for hashing or encoding is never sent anywhere.
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- Number Base ConverterConvert arbitrarily large integers between binary, octal, decimal, hexadecimal and any base from 2 to 36.
- Text to Binary, Hex & ASCII ConverterConvert text to binary, hexadecimal, decimal byte codes (UTF-8) and back.
- Base64 Encoder & DecoderEncode text to Base64 or Base64URL and decode it back (UTF-8 safe).
- Bitwise Operations CalculatorPerform bitwise AND, OR, XOR, NOT and shifts on integers in decimal, hex (0x) or binary (0b).
- Two's Complement CalculatorConvert signed integers to two's complement binary/hex and back for 8, 16, 32 or 64-bit words.
- IEEE 754 Floating-Point ConverterShow the IEEE 754 single (32-bit) and double (64-bit) representation of a number: sign, exponent, mantissa and rounding error.
- IPv4 Subnet CalculatorCalculate network address, broadcast, usable host range, netmask, wildcard and host count for an IPv4 address in CIDR notation.
- Hash GeneratorCompute SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 checksums of text, entirely in your browser.
- Password Strength & Entropy CalculatorEstimate password entropy in bits and brute-force cracking time (calculated locally, never transmitted).
- Unix Timestamp ConverterConvert Unix epoch timestamps (seconds or milliseconds) to human-readable dates and back.
- Download / Data Transfer Time CalculatorHow long it takes to transfer a file at a given connection speed.
- Color ConverterConvert colors between HEX, RGB, HSL, HSV and CMYK; check contrast against white and black (WCAG).