Utilities
D2d - Data Conversion Toolkit
D2d is a fast, fully offline data-conversion toolkit for engineers, embedded developers, and anyone working close to the bits.
Convert between binary, hexadecimal, decimal, octal, ASCII, Gray code, BCD, and advanced number systems — every conversion comes with a step-by-step explanation, a worked example, and a reference table. Built with Tauri, React, and TypeScript, D2d runs fully offline as a lightweight native app across Windows, macOS, Linux, and Android.
Community-driven tools with transparent release notes and public source code.
Downloads
Latest release v0.1.0 · May 21, 2026Open source — browse the code, releases, and issues.
View on GitHub5 screenshots
Highlights
26 conversion tools, 8 categories
Cover Binary, Hexadecimal, Decimal, Octal, ASCII, Gray code, BCD, and advanced number systems from one searchable catalog.
Multi-Format converter
Edit any field and watch every other format — ASCII, hex, decimal, binary, and octal — update instantly.
Learn while you convert
Each conversion ships with a step-by-step explanation, a worked example, and a reference table.
Arbitrary-precision integers
BigInt-backed conversions handle values of any size with no 32-bit or 64-bit overflow.
Advanced numerics
Convert signed/unsigned (8/16/32/64-bit), Base-N (2–36), and IEEE 754 single and double precision.
Quality-of-life UX
One-click direction swap, copy-to-clipboard for inputs and outputs, and dark/light theming on a responsive UI.
Local, offline-first operation
Runs entirely on your machine as a native Tauri app with no cloud dependency.
Cross-platform with auto-update
Available for Windows, macOS, Linux, and Android, with desktop builds auto-updating from signed GitHub releases.