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Batch Compress PDF Online Free — PrivaTools

Batch compress multiple PDFs online for free — upload up to 50 files and compress them all in parallel. Choose light, balanced, or extreme compression. Download results as a single ZIP file. No sign-up, 500 MB per file.

Batch Compress PDF is one of 105 free file tools on PrivaTools. All processing happens on our servers with zero-knowledge architecture — your files are never stored, never read, and never shared with third parties. No account required.

How to Batch Compress PDF with PrivaTools

  1. Upload PDF files — Select or drag up to 50 PDF files into the upload area. Each file can be up to 500 MB.
  2. Choose compression level — Select Light (minimal quality loss), Balanced (recommended), or Extreme (maximum size reduction).
  3. Compress and download — Click Compress All. The server processes all files in parallel using 4-core processing and returns a ZIP with all compressed PDFs.

Frequently Asked Questions

How many PDFs can I compress at once?

You can upload up to 50 PDF files per batch. Each file can be up to 500 MB. All files are compressed in parallel using 4-core processing.

What compression levels are available?

Three levels: Light (minimal quality loss, ~20% reduction), Balanced (good quality with ~50% reduction), and Extreme (maximum compression, up to 90% smaller).

How do I get my compressed files?

All compressed PDFs are packaged into a single ZIP file for download. Each file keeps its original name with '_compressed' appended.

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