Compress PDF

Reduce PDF file size while maintaining quality. Fast, free, and processed entirely in your browser.

Drop your files here, or browse

Supports PDF

You can select multiple files at once (up to 50)

100% browser-based. Your files never leave your device.

Large PDF files are one of the most common pain points in digital document management. Oversized PDFs clog email inboxes, slow down file sharing, and consume unnecessary storage space. DaConvert's PDF Compressor reduces PDF file sizes while maintaining readable quality.

The compression process works by re-encoding the PDF structure and optimizing internal resources. This is particularly effective for PDFs generated from scanned documents or those containing embedded high-resolution images. Typical compression ratios range from 20-70% reduction depending on the content type.

Unlike cloud-based PDF compressors that upload your sensitive documents to remote servers, DaConvert processes everything in your browser using pdf-lib. This makes it safe for compressing confidential contracts, financial statements, medical records, and other sensitive documents. Batch compress multiple PDFs at once and download them all in a single ZIP file.

Frequently Asked Questions

How much can PDF file size be reduced?+
Compression ratios vary depending on PDF content. PDFs with embedded images typically see 40-70% size reduction. Text-heavy PDFs with minimal images may see 10-30% reduction.
Will compression affect PDF quality?+
DaConvert uses optimized compression that maintains readable quality. Text remains crisp and clear. Images may have slight quality reduction but remain suitable for screen viewing and standard printing.
Can I compress password-protected PDFs?+
Password-protected PDFs need to be unlocked before compression. DaConvert processes unprotected PDF files.
Is batch PDF compression supported?+
Yes. You can compress up to 50 PDF files at once. Each file is processed individually, and you can download all compressed files as a single ZIP archive.