Compress PDF
Files & ImagesShrink a PDF by redrawing pages as JPEG at a chosen quality.
Calculated Result
Open a PDF
Formula: Rasterize pages as JPEG, rebuild PDF
About this calculator
Vector text becomes an image, so files get smaller and may look softer. Pick quality. This is the usual client-side tradeoff without a server.
How It Works & Formula
FormulaRe-render pages as JPEG at a chosen scale and quality, then rebuild
pdf.js renders each page. The bitmap is JPEG-encoded, then pdf-lib embeds those images.