How to Compress a PDF Without Ruining Quality

PDFs get large for predictable reasons: high-resolution images, embedded fonts, uncompressed scans and duplicated resources. Knowing which one dominates your file tells you which lever to pull.

For scanned documents, the biggest win is downsampling images to the resolution you actually need — 150 DPI is plenty for on-screen reading, 300 DPI for print. Re-saving with JPEG quality around 70–80 usually halves image weight invisibly.

For digitally created PDFs, subset embedded fonts (include only used glyphs), flatten transparency before export, and prefer vector graphics over screenshots of charts.

If you only need a few pages, extract them instead of compressing the whole file: fewer pages always beat cleverer compression.

Need a fresh lightweight PDF? The RovoTools PDF Creator tool generates a clean PDF from plain text entirely in your browser — ideal for notes, letters and simple documents.