Practical guides
Straight answers to the questions that come before the tool: compressing PDFs, opening HEIC files, severance, payroll deductions and more.
How to compress a PDF to under 2 MB Why PDFs get heavy, what can be reduced without ruining the document, and how to hit the 2 MB limit forms and portals demand. Tool: Compress PDF Why Windows won’t open HEIC files (and how to fix it) What the iPhone’s HEIC format is, why Windows refuses it, the three ways to fix it and how to avoid it at the source. Tool: HEIC to JPG How Brazilian severance pay is calculated Each severance item explained — salary balance, notice, holidays, 13th salary and the FGTS fine — and what changes by type of termination. Tool: Brazilian severance calculator (CLT) Commercial, tourism and PTAX dollar: what’s the difference Why several dollar rates exist on the same day, which one Google shows, which one your card charges and how to work out the real cost. Tool: Dollar today & other currencies How much investing a fixed amount every month grows Compound interest in concrete numbers: what a fixed monthly amount becomes in 5, 10 and 20 years, and why time matters more than the amount. Tool: Compound interest calculator How to create a strong password you can actually use Why swapping letters for symbols protects nothing, what actually makes a password hard to crack, and how to manage dozens of them. Tool: Password generator What gets deducted from a Brazilian salary in 2026 How Brazil’s progressive social security and income tax brackets work, and why earning more never leaves you with less. Tool: Brazilian net salary calculator MEI or Simples Nacional: which is worth more Limits, real monthly cost, what each regime gives you and the revenue point where the simplified regime stops being worth it. Tool: Simples Nacional & MEI How to remove a photo background (and when you can’t) What automatic background removal does well, where it fails, how to prepare the photo and how to make a white-background ID photo. Tool: Remove image background How to merge several PDFs into one file How to merge PDFs in the right order, what to do with password-protected files and how to keep the final document from bloating. Tool: Merge PDF