Shrink PDFs Online: Tools That Actually Work
After testing dozens of online PDF compressors, here are the only three I trust for serious file reduction without turning documents into pixelated messes:
1. Smallpdf (Best All-Rounder)
Smallpdf’s compression algorithm is surprisingly sophisticated for a free tool. It maintains text clarity while aggressively shrinking images. The interface is dead simple—drag, drop, and download. Files auto-delete after 1 hour, which is better privacy than most competitors:cite[1]:cite[4].
2. PDFgear (Best for Privacy)
PDFgear uses MRC compression tech to preserve text sharpness while reducing image file sizes. No registration required, and files are wiped after session end—crucial for sensitive documents:cite[8]. Their “Medium” compression setting is the sweet spot for quality vs. size.
3. ILovePDF (Best for Batch Jobs)
ILovePDF handles multiple files better than most. The free version allows two documents daily with excellent OCR retention. Pro tip: Use their “Recommended” compression—the “Extreme” option murders image quality:cite[6].
Warning: Avoid obscure PDF compressors—many secretly keep your files or inject watermarks. I’ve had clients’ confidential documents surface on random servers after using shady “free” tools.
Pro tip: For scanned PDFs, stick to tools with OCR preservation like Smallpdf or ILovePDF. Generic compressors often turn scanned text into unsearchable blobs.
