Hardcode Tools
Powerful tools for students, developers, engineers and creators.
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Most frequently used utilitiesScientific Calculator
Full-featured online scientific calculator with trigonometric, logarithmic, exponential, and memory operations.
JSON Formatter & Beautifier
Format, beautify, inspect tree structures, and compact JSON strings with instant syntax highlighting.
Unit Converter
Convert length, mass, volume, temperature, speed, area, time, and digital storage units accurately.
Ohm's Law Calculator
Calculate Voltage (V), Current (I), Resistance (R), and Power (P) instantly using Ohm's Law relationship formulas.
Resistor Color Code Calculator
Decode 4-band, 5-band, and 6-band resistor color codes to resistance values, tolerances, and temp coefficients.
GPA / CGPA Calculator
Calculate your semester GPA and cumulative CGPA with customizable credit units and grading systems.
QR Code Generator
Generate customizable QR codes for text, URLs, WiFi credentials, email, and contact cards with PNG/SVG downloads.
Base64 Encoder & Decoder
Encode plain text into Base64 format and decode Base64 strings back to readable plain text.
Color Converter
Convert colors between HEX, RGB, RGBA, HSL, HSLA, and CMYK with a live color picker and palette generator.
Engineering Unit Converter
Specialized engineering unit converter for pressure, stress (MPa/psi), dynamic/kinematic viscosity, energy, and flow rates.