Convert numbers between binary, octal, decimal, and hex with bitwise views. Read 0xFF as 255 instantly — local math, free, no signup.
Convert between Roman numerals and numbers both ways — chapters, clocks, movie credits. Decode MCMXCIV as 1994 instantly — local math, free, no signup.
Encode any text into binary (base-2) byte sequences with visible separators. See exactly how computers store letters — local encoding, free, no signup.
Convert between plain text and binary in both directions — encode text into its base-2 representation or decode binary strings back to readable text, byte by byte. Files are converted locally in your browser — nothing is uploaded.
Convert IPv4 addresses between dotted-decimal, hex, integer, and binary forms. Decode 2130706433 to 127.0.0.1 instantly — local math, free, no signup.
Get ISO week numbers for any date — plan sprints and fiscal weeks correctly. Know Week 32 means late July instantly — free, local, no signup.
255 — hex pairs map to bytes directly. Color codes (#FF0000) decode to RGB triples the same way.
Yes — octet-by-octet binary reveals network/host splits. 192.168.1.0/24 reads clearly in bits.
Two's complement representation with configurable bit width. Unsigned default; toggle for signed interpretation.
No — math runs locally in your browser. Numbers never leave your device.
Hex ↔ ASCII Converter
Convert between hexadecimal bytes and ASCII text. Supports custom delimiters and real-time bidirectional conversion. Code never leaves your device — formatting and validation run locally in your browser.
Unicode Converter
Convert text to Unicode code points with JavaScript escape sequences and HTML entities. JavaScript escapes plus HTML entities covered — free, local, no signup.
Last updated October 2026