Guias e tutoriais

Guias passo a passo para tarefas do dia a dia com PDF, fotos e arquivos.

Por enquanto, estes guias estão em inglês.

• 8 de outubro de 2026 · 2 min de leitura

  How to compress a PDF for email (without making it unreadable)

  Email services reject big attachments. Here's how to shrink a PDF under 10, 5 or 1 MB while keeping text sharp, and what to do when it still won't fit.

  Ler o guia →

• 7 de outubro de 2026 · 2 min de leitura

  How to take a passport photo at home with your phone

  Lighting, background, pose and printing: a practical guide to taking a passport or visa photo at home that meets official size rules.

  Ler o guia →

• 6 de outubro de 2026 · 1 min de leitura

  How to combine PDF files into one, free and without software

  Merge several PDFs into a single document in the right order, on any device, without installing anything or uploading your files.

  Ler o guia →

• 5 de outubro de 2026 · 1 min de leitura

  HEIC to JPG: how to open and convert iPhone photos on Windows

  Why iPhone photos are HEIC files, why Windows and many websites can't open them, and the quickest ways to convert them to JPG.

  Ler o guia →

• 4 de outubro de 2026 · 2 min de leitura

  How to reduce a photo to 20 KB or 50 KB for online application forms

  Exam, job and government portals often demand photos and signatures under a strict KB limit and exact pixel size. Here's how to meet both in one go.

  Ler o guia →

• 3 de outubro de 2026 · 1 min de leitura

  How to sign a PDF without printing it

  Add your signature to a contract, form or letter on your phone or computer in under a minute, with no printer, scanner or account.

  Ler o guia →