Tools
A catalog of free tools for financial calculations, secure generators, document validators, basic math, and date counting.
Tool families
Calculators
Simulate financial, labor, and asset scenarios with detailed tools.
8 tools
Generators
Create passwords and random numbers with simple, safe settings.
2 tools
Validators
Check documents and common inputs with public rules and instant results.
2 tools
Math
Solve percentages, proportions, and common everyday calculations.
2 tools
Dates
Count periods, date differences, and time intervals.
1 tool
Popular tools
Loan Calculator
Simulate your loan using SAC or PRICE systems. View the complete amortization schedule with all installments.
Open calculatorCompound Interest
Calculate the yield of your investments with compound interest over time.
Open calculatorPassword Generator
Create strong passwords with configurable length, letters, numbers, and symbols.
Open toolFixed Income Comparator
Compare fixed income investments (Fixed Rate, CDI, IPCA+, Selic) net of IR/IOF taxes and inflation.
Open calculatorCPF Validator
Check whether a CPF has valid check digits.
Open toolConsortium Calculator
Simulate your consortium installments with annual INCC/IPCA correction.
Open calculatorNew tools
Password Generator
Create strong passwords with configurable length, letters, numbers, and symbols.
Open toolRandom Number Generator
Generate one or more random numbers within a defined range.
Open toolCPF Validator
Check whether a CPF has valid check digits.
Open toolCNPJ Validator
Check whether a CNPJ has valid check digits.
Open toolPercentage Calculator
Calculate percentages, increases, discounts, and changes quickly.
Open toolRule of Three
Solve direct proportions with a simple rule-of-three calculator.
Open toolDay Counter
Count days between two dates and see the difference in weeks and approximate months.
Open tool