Free PDF Compressor: Reduce PDF Size to 100KB, 200KB or 1MB Online

June 10, 2026 · 4 min read

A PDF compressor makes documents easier to email and upload. This free online PDF compressor is ideal for scanned or image-heavy PDFs, helping you reach a target like pdf compressor to 100kb, 200kb, 500kb or 1mb. It is a free pdf compressor online with no watermark.

How to compress a PDF

  1. Open the free PDF Compressor.
  2. Upload your PDF.
  3. Pick a quality level to control the size reduction.
  4. Click Run and download the smaller PDF.

Frequently asked questions

What is a PDF compressor?

A tool that reduces a PDF's file size while keeping it readable, so it is easier to share or store.

What is the best free PDF compressor for large files?

For large, image-heavy PDFs, a rasterizing compressor like ours works well — lower the quality to shrink very large files further.

Can I compress a PDF to 100KB or 200KB?

Lower the quality slider. Hitting an exact target like 100KB or 200KB works best for scanned/image PDFs.

Why didn't my text PDF get much smaller?

Text-only PDFs are already small, so there is little to compress. This tool shines on scanned and image-based PDFs.