Guides

Practical guides for everyday PDF jobs. Every rule and limit is checked against the official source, which is linked in each guide.

• PDF too big to email? How to get under the attachment limit
  Gmail, Outlook.com and Yahoo Mail all stop at 25 MB per email. Here's how to get a PDF under that, and what to do when compressing isn't enough.
• IRCC document upload: size limits and how to fix "file too large"
  Canada's immigration portals reject files over 4 MB or 5 MB, depending on which one you use. Here are the limits, the accepted formats, and how to get your PDFs under them.
• How to compress a PDF to a specific size
  Upload forms often say "maximum 200 KB" or "no larger than 4 MB". Here's how to hit a limit like that, why no tool can make a file exactly a given size, and how to keep the result readable.
• How to combine scanned documents into one PDF for an application
  Applications for visas, jobs, loans and rentals often ask for your documents as one PDF, under a size limit. Here's how to go from a pile of photos, scans and Word files to one tidy file.
• USCIS online filing: file size and format rules for evidence
  When you file a USCIS form online, each evidence file must be 6 MB or smaller and in PDF, JPG or TIFF format. Here's how to get your documents ready.