Large PDF documents are difficult to share over email. Standard compressors upload files to remote servers, leaving files vulnerable. Here are three secure, local methods to optimize and reduce PDF sizes in browser memory.
1. Compress Embedded Images
Images represent the majority of PDF file sizes. Downsampling images to 150 DPI or 72 DPI using Ghostscript WASM compression will compress files without destroying text quality.
2. Clean Redundant Resources
Many PDFs contain duplicate fonts, color space definitions, and metadata tables. Optimizing layout tables reduces file size without altering page contents.
3. Delete Unwanted Pages
Discarding pages using a page remover tool reduces the final document footprint.