PDF Compress

What PDF Compress helps you do

Reduce a PDF's size locally with a lossless re-save or one of three raster quality modes. The result includes the before-and-after size so you can choose whether the reduction is worth any change in searchability or visual quality.

Files are processed entirely in your browser. Nothing is uploaded to Haivix servers.

How to use PDF Compress

1. Try Lossless first to preserve page content while reducing structural overhead.
2. If the file remains too large, use Balanced raster mode and inspect text and diagrams in the result.
3. Move to the smallest mode only when size matters more than selectable text, and keep the original document.

What you can do with PDF Compress

• Re-save a PDF with object streams for a lossless optimization attempt.
• Rasterize pages at high, balanced, or smallest-size JPEG quality.
• Show page-by-page progress for raster compression.
• Compare original and output sizes before using the downloaded result.

Example: fit a document under an upload limit

Try Lossless first because it preserves page content and may reduce structural overhead. If the file remains too large, use Balanced raster mode and inspect text, signatures, diagrams, and small print in the downloaded PDF.

Move to the smallest mode only when file size matters more than perfect detail. Keep the original document because raster compression can turn selectable text and vector artwork into page images.

What to know before you start

• Already optimized PDFs may shrink very little or even become slightly larger.
• Raster modes can reduce sharpness, remove text selection, and affect accessibility or searchability.
• Password-protected or damaged PDFs may need another workflow before compression succeeds.