Compress PDF
Reduce PDF file size in the browser by recompressing embedded images, with JPEG quality and dimension controls for the best savings on image-heavy files.
What it does
- Adjustable JPEG quality and max image dimension
- Optional metadata stripping for extra size reduction
- Batch compress multiple PDFs, exported as a ZIP
- Best results on image-heavy or scanned PDFs
- All processing stays in your browser, no upload
Unlike a hosted compressor, this tool keeps your document on device the entire time. The compression guide explains that the Wasm module "loads once when the page opens" and "after that the network goes quiet." Savings come from recompressing and downsampling embedded images, so scanned or image-heavy PDFs shrink the most while text-only files change little.