All Free Online Tools
Browse the complete collection of free tools that run directly in your browser. No sign-up or installation needed.
Percentage Calculator
Calculate percentages quickly and easily. Discounts, increases, VAT and more.
VAT Calculator
Calculate VAT instantly: add it to a base amount or extract it from a total. With 4%, 10% and 21% rates.
Rule of Three
Solve the rule of three instantly. Calculate direct proportions quickly and for free.
Discount Calculator
Calculate the final price and savings of any discount instantly. Sales, promotions and percentage discounts.
Tip Calculator
Calculate the tip, the total and how much each person pays when splitting the bill. Free and no sign-up.
BMI Calculator
Calculate your Body Mass Index (BMI) and see your category: underweight, normal, overweight or obese. Free.
Net Salary Calculator
Calculate your net salary from gross in Spain: IRPF income tax and Social Security deductions. Free and up to date.
Compound Interest Calculator
Calculate compound interest on your savings and investments with monthly contributions and an annual breakdown.
Mortgage Calculator
Calculate your monthly payment, total interest and the full amortization schedule for your mortgage. Free and no sign-up.
Pension Calculator
Calculate your estimated retirement pension in Spain: years contributed, regulatory base and percentage. Free and up to date.
IRPF Calculator 2026
Calculate your IRPF income tax on your annual income in Spain. 2026 brackets from 9.5% to 24.5% with deductions. Free and up to date.
Unemployment Calculator
Calculate your Spanish unemployment benefit (paro): months of entitlement and how much you will receive. 70% and 60% of your regulatory base. Free.
UUID Generator
Generate unique UUID v4 quickly and for free. Copy one or many UUIDs with a single click.
Password Generator
Generate secure and random passwords instantly. Choose the length and character types you prefer.
MD5 Generator
Generate the MD5 hash of any text or string, in lowercase and uppercase, to verify data integrity.
Base Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly. Ideal for programmers and students.
SHA-256 Hash Generator
Generate the SHA-256 hash of any text or string. Verify data integrity quickly and securely.