Working with PDFs is part of everyday life for students, professionals, and businesses. Yet many people make avoidable mistakes that waste hours of productivity. Here are the 10 most common PDF errors and how to solve them instantly.
1. Sending Oversized PDF Files via Email
Email providers typically limit attachments to 25MB. Many users create PDFs with high-resolution images that balloon the file size unnecessarily.
Solution: Use a PDF compression tool to reduce file size by up to 80% without visible quality loss. Most documents look identical at 150 DPI compared to 300 DPI on screen.
2. Forgetting to Embed Fonts
When you create a PDF on your computer and open it on another device, missing fonts get substituted — breaking your carefully designed layout.
Solution: Always embed fonts when exporting to PDF. In most applications, this is a checkbox in the export settings. If you receive a PDF with font issues, our PDF Editor can help you fix text directly.
3. Not Adding Password Protection to Sensitive Documents
Contracts, financial statements, and personal documents often get shared without any security. Anyone who intercepts the file can read and modify it.
Solution: Always password-protect sensitive PDFs before sharing. Use a strong password with at least 12 characters combining letters, numbers, and symbols.
4. Scanning Documents at the Wrong Resolution
Scanning at 600 DPI creates unnecessarily large files, while 72 DPI makes text unreadable. Both extremes cause problems.
Solution: Scan text documents at 150-200 DPI for the best balance of quality and file size. For documents with detailed graphics, use 300 DPI maximum.
5. Not Making Scanned PDFs Searchable
Scanned documents are essentially images — you cannot search, copy, or edit the text inside them. This makes finding information extremely difficult.
Solution: Run OCR (Optical Character Recognition) on scanned PDFs to convert them into searchable, editable text while preserving the original layout.
6. Merging PDFs in the Wrong Order
When combining multiple documents, it is easy to get pages out of sequence, especially when dealing with numbered reports or multi-chapter documents.
Solution: Use a PDF merge tool that lets you preview and reorder files before combining them. Always check the final document page by page.
7. Leaving Metadata Exposed
PDFs store hidden metadata including author name, creation software, edit history, and sometimes even deleted content. This can leak sensitive information.
Solution: Before sharing important documents, check and clean the metadata. Many PDF editors allow you to view and remove document properties.
8. Using Screenshots Instead of Proper Conversion
Taking screenshots of documents and pasting them into PDFs creates blurry, unsearchable, and oversized files.
Solution: Use proper PDF conversion tools to transform documents between formats. This preserves text quality, searchability, and keeps file sizes manageable.
9. Not Splitting Large Documents for Sharing
Sending a 200-page PDF when the recipient only needs pages 15-20 wastes bandwidth and makes it harder for them to find relevant information.
Solution: Split your PDF to extract only the relevant pages before sharing. This is faster, more professional, and easier for the recipient.
10. Ignoring Accessibility in PDFs
Many PDFs lack proper heading structure, alt text for images, and reading order — making them unusable for people with screen readers.
Solution: When creating PDFs, use proper heading styles, add alt text to images, and ensure a logical reading order. This also improves SEO when PDFs are indexed by search engines.
Conclusion
Avoiding these common mistakes will save you time, protect your data, and make your documents more professional. All the tools mentioned above are available free on SnapPDF — no registration required.