FIPE table: how to check vehicle prices
Query FIPE by code or text search and interpret vehicle pricing output correctly.
Read articlePractical guides for online tools and productivity
Actionable content for document validation, financial calculations, PIX flows, and technical operations.
How to generate a WhatsApp link and improve conversion
Create wa.me links with prefilled messages for support and sales journeys.
Read article Strong password generator: practical security tips
Apply robust password criteria and everyday account security practices.
Read article How to calculate BMI: table and interpretation
Learn BMI formula, classification ranges, and interpretation limits.
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How to accept PIX on your website or online store
Set up practical PIX flow using QR Code and copy-paste payload.
Read article How to lookup Brazilian CEP with ViaCEP API
Learn CEP format, API integration basics, and common error handling.
Read article How to validate PIX keys: CPF, CNPJ, email, phone, random key
Validate PIX key formats to reduce onboarding and payment errors.
Read article Dynamic vs static PIX QR Code: practical differences
Compare use cases, operational complexity, and payment experience.
Read article How to create a static PIX QR Code for your business
Build a static BR Code PIX charge with key, optional amount, and payer-friendly payload.
Read article PIX copy-and-paste: what it is and how to generate
Understand PIX payload format and generate valid copy-and-paste codes.
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How to simulate income tax in 2026 with progressive brackets
Estimate withholding tax and annual projection with common deductions.
Read article Markup calculator: how to set your selling price
Learn pricing structure with target margin and avoid common markup mistakes.
Read article Price vs SAC amortization: which one should you choose
Compare Price and SAC amortization systems and their cash-flow implications.
Read article How to estimate Brazilian CLT severance pay
Understand salary balance, notice pay, vacation, 13th salary, and FGTS penalty scenarios.
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Base64 encode/decode: what it is and how to use it
Understand practical Base64 usage, limits, and UTF-8 caveats.
Read article How to calculate compound interest: formula and examples
Calculate compound growth using periodic rate, term, and recurring contributions.
Read article What is UUID and when to use it in distributed systems
Understand UUID v4, tradeoffs, and practical usage patterns.
Read article How to generate fake test data without using real data
Build coherent test datasets with CPF, email, and address for QA and staging.
Read article How to validate CPF in JavaScript: full algorithm and best practices
Learn CPF check-digit logic and implement reliable validation in JavaScript.
Read article How to validate CNPJ in Python: step-by-step
Implement CNPJ validation in Python using the official check-digit rules.
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