NibbleCalc: Dev Calculator

A whole developer toolbox inside one fast, beautiful calculator — programmer mode, color tools, JWT, hashes, timestamps and more. All offline.

NibbleCalc is the all-in-one calculator for developers, designers, and power users — a clean, fast calculator plus a full toolbox, all offline.

FOUR-FUNCTION & SCIENTIFIC • Beautiful standard calculator with calculation history • Full scientific panel in landscape (trig, logs, powers, roots, factorial)

PROGRAMMER • HEX / DEC / OCT / BIN, live side by side • Bit widths from 8-bit up to 127-bit • Flip individual bits in an interactive bit grid • AND, OR, XOR, NOT and shifts

COLOR TOOLS • Convert HEX, RGB, HSV, HSL and CMYK • Copy ready-to-use CSS, SwiftUI and UIKit code • Color Scan: pick real-world colors with your camera • WCAG contrast-ratio checker

DEVELOPER TOOLS • JWT decoder — header, payload and claims, fully offline • MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes • UUID v4 generator • Base64 encode / decode (URL-safe too)

DATE & TIME • Date calculator — add, subtract, days between • Unix timestamp converter — ISO 8601, RFC 2822, UTC and local

MADE TO ENJOY • Three themes: Dark, Vibrant, Minimal • iPhone & iPad, portrait and landscape • 17 languages • Works entirely offline — your data never leaves your device

NibbleCalc Pro (one-time purchase) • Remove ads • Unlock Dev Tools, Color Scan, 127-bit width and premium themes

Download NibbleCalc and carry a whole developer toolbox in one calculator.