Batch PDF Compressor
Compress multiple PDF files at once with one compression level, and download them all as a ZIP. Runs entirely in your browser.
Compress multiple PDFs
Add several PDFs, choose a compression level, then compress them all at once.
Batch complete
How to use this tool
- Drag and drop several PDFs into the box above, or click to browse and select multiple files.
- Choose a compression level — it applies to every PDF in the batch.
- Press Compress all & download ZIP and wait while each file is processed page by page.
- Click Download batch-compressed-pdfs.zip to save every result in one file.
FAQ
Frequently asked questions
Are my PDFs uploaded anywhere?
No. Every PDF is compressed locally in your browser using pdf.js, pdf-lib and JSZip — nothing is uploaded to a server.
How does the compression work?
This tool uses the same technique as the single-file Compress PDF tool — each page is re-rendered as a JPEG image at your chosen compression level and reassembled into a new PDF, one file at a time across the whole batch.
Will text stay selectable?
No, since pages are rasterized to images, text becomes part of the image and is no longer selectable or searchable. Use this tool when file size matters more than text selection.
What do I download?
A single ZIP file containing every compressed PDF, keeping original filenames.