Bit-Level Developer Tools
Exact at Any Width

Registers, masks, floats, and checksums - plus base conversion with arbitrary precision. Every integer path runs on BigInt, never a float, so 64 and 128-bit values stay exact to the last digit.

Instant, in-browserBigInt exact beyond 2^53Nothing uploadedNo ads

Bitmask & Register Workbench IEEE 754 Float Converter Universal Number Inspector

Quick Convert

Input base:

Bits & Bytes

Registers, masks, floats, and checksums - the bit-level toolkit

Bitmask Generator & Register WorkbenchPopular Bit Shift CalculatorPopular Bitwise Calculator Two's Complement CalculatorPopular Hex to Float & IEEE 754 ConverterPopular Fixed-Point (Q Format) Converter Hex Dump ViewerPopular CRC CalculatorPopular Endianness Converter Bytes to Int Converter Gray Code Converter BCD Converter Binary Calculator Hex Calculator Byte Converter

Convert Numbers

Base conversion with arbitrary precision - exact beyond 2^53

Universal Base Converter & Number InspectorPopular Hexadecimal to Decimal ConverterPopular Decimal to Hexadecimal ConverterPopular Binary to Decimal Converter Decimal to Binary Converter Octal to Decimal Converter Decimal to Octal Converter Hexadecimal to Binary Converter Binary to Hexadecimal Converter Octal to Binary Converter Binary to Octal Converter Hexadecimal to Octal Converter Octal to Hexadecimal Converter

Text & Encoding

ASCII, Unicode, and binary text encodings

Binary Translator Text to Binary Converter Binary to Text Converter Text to Hex Converter Hex to Text Converter ASCII Converter ASCII Table Unicode Converter The Alphabet in Binary

Networking & Utils

Subnets, IP addresses, UUIDs, hashes, and timestamps

IPv4 Subnet Calculator IP to Decimal Converter Decimal to IP Converter UUID Generator UUID v7 Generator GUID Generator Hash Generator Random Number Generator Unix Timestamp Converter Discord Timestamp Generator

Math Tools

Ratios, percentages, and number systems

Percentage Calculator Golden Ratio Calculator Aspect Ratio Calculator Roman Numeral Converter

References Worth Bookmarking

Methodology & Correctness

Why every integer path uses BigInt, input limits, and how results are tested.

Base Conversion Test Vectors

Verified 2^53-boundary and 64/128/256-bit vectors, generated from tested code.

Number Literal Syntax Matrix

0b / 0o / 0x literals, BigInt, and parse functions across seven languages.

Built for Developers

Exact Beyond 2^53

BigInt end to end. 64, 128, 256-bit values convert without losing a single digit - and we label when plain numbers stop being safe.

100% Client-Side

All processing in your browser. Your data never leaves your device.

Code-Ready Output

Signed views, endian bytes, and copy-ready snippets in JS, Python, Go, Rust, C, and shell.

Part of our developer tools network. Also check out hextorgb.io for color conversions.

Bit-Level Developer ToolsExact at Any Width