Combine multiple PDFs into one, extract pages, and compress PDF file size using pdf-lib — all client-side with no uploads to any server.
This tool uses pdf-lib and pdf.js (loaded from CDNs) to read and write PDFs entirely in your browser. Merging concatenates the pages of multiple files, splitting extracts each page into its own file, and compressing re-renders each page at a screen-friendly resolution and re-encodes it as a quality-controlled JPEG so the file shrinks dramatically. No file ever leaves your device.