Tools & Calculators
A collection of utilities I built to make my (and your) daily life easier.
// PLC & Automation
Analog Value Scaling Calculator
Conversion between digital and physical values with presets.
Data Type Converter
Convert between data types (BYTE…LREAL) and number bases — decimal, hexadecimal, binary, bitwise.
PID Parameter Calculator
Calculation of PID controller parameters using various methods.
Belt Speed Calculator
Calculate belt speed from shaft rotational speed and diameter/radius to the belt surface.
Modbus Register Calculator
Decode INT/DINT/REAL from Modbus registers, incl. byte and word swap.
IP Subnet Calculator
Subnet mask, network/broadcast address and host range for plant network planning.
BCD Converter
Convert between BCD, decimal and hexadecimal.
Gray Code Converter
Convert between Gray code, binary and decimal for absolute encoders.
CRC Calculator
Compute checksums (Modbus CRC-16, CRC-32 and more).
Gearbox & Pulley Calculator
Ratio, output speed and torque for gearboxes and pulleys.
Unit Converter
Convert pressure, torque, flow and temperature.
PLC address planner
Plan the address ranges of a PLC station: pick modules, calculate byte demand and start addresses, export to Excel.
// Electrical
Cable Cross-Section Calculator
Calculation of required cable cross-section with voltage drop.
Motor Protection Calculator
Calculation of rated currents and motor protection device sizing.
Sensor Linearization (RTD/NTC/TC)
Convert resistance or voltage to temperature (PT100/PT1000, NTC, thermocouple).
Ohm's Law & Power
Ohm's law and power triangle (P, Q, S, cos φ) for AC and three-phase.
Resistor Color Code
Convert colour bands to resistance value (4/5/6 bands).
Energy Cost Calculator
Calculate energy consumption and cost from power, runtime and tariff.
// Web & Developer
JSON Schema Validator
Fast validator for complex JSON schemas with visual error output.
Color Palette Generator
Create color palettes, convert between HEX, RGB, HSL, and CMYK with contrast check.
Image Optimizer
Local image compression for WebP and AVIF without server upload.
Cron Expression Explainer
Explain cron expressions in plain text and show next run times.
Timestamp Converter
Convert Unix timestamp ↔ date/time with time zones.
Base64 & JWT Decoder
Encode/decode Base64 and decode JWT tokens.
Hash & UUID Generator
Generate hashes (SHA-256 and more) and UUIDs locally in the browser.
Regex Tester
Test regular expressions, highlight matches and explain them.
JSON ↔ YAML Converter
Convert between JSON and YAML.
Text Diff
Compare two texts line by line.
QR Code Generator
Generate QR codes from text or URL.
Password Entropy
Estimate password strength (local, nothing stored).
Timesheet
Write timesheets and print them as PDF - in the browser, without installation and without Excel.
// Finance
ETF Savings Calculator
Simulate wealth accumulation: compound interest, inflation, final portfolio with interactive charts.
Real Estate Financing Calculator
Calculate closing costs, monthly payments, amortization schedule, and remaining debt professionally.