Categories of PDF Tools

Online PDF tools fall into three categories: basic manipulation (split, merge, rotate), conversion (PDF ↔ Word/Excel/Image), and editing (add text, annotations, signatures). Free tools cover the first two categories well; true editing is harder to do for free.

Best Free PDF Manipulation Tools

• Delete pages: Doit Connect PDF Delete
• Compress: PDF Compressor
• Merge: PDF Merger
• To image: PDF to Image

Features to Look For

• Privacy: Does it process locally or upload to a server?
• File size limits: Free tools often cap at 50-100MB
• Page count limits: Some tools restrict free users to 50 pages
• Output quality: Compression tools should preview before download

When to Upgrade

If you work with PDFs daily, process large files (>100MB), or need editing capabilities (modifying text content), a paid tool like Adobe Acrobat, PDFElement, or PDF Expert is worth the cost.