Compress PDF
Reduce PDF file size by rendering pages as compressed images.
Processed locally in your browser. Each page is rendered and re-compressed as a JPEG image, which means text is no longer selectable in the output — this works best for scanned documents and image-heavy PDFs, not text documents you need to keep searchable.
Overview
Reduces PDF file size by rendering every page to an image and re-encoding it as a compressed JPEG. This is a real, effective way to shrink scanned or photo-heavy PDFs, but because pages become images, text in the output is no longer selectable or searchable.
How to use it
- 1Upload a PDF.
- 2Choose a compression quality.
- 3Download the compressed file and compare the size reduction.
How it works
Each page is rendered to a canvas with PDF.js at a resolution suited to screen/print viewing, re-encoded as a JPEG at your chosen quality, then reassembled into a new PDF with pdf-lib.
Tips
- Best for scanned documents, photos and image-heavy pages — you'll see a large size reduction.
- If your PDF is mostly typed text you need to keep selectable and searchable, this tool isn't the right fit — the output will look identical but the text won't be selectable.