Optimize files

Shrink PDFs with clear quality presets

Use PaperKit compression presets to trade file size against output quality with clear size stats.

Compress PDF Optimize

Upload your files

Select the files you want to compress pdf and PaperKit will open the interactive workspace.

Drop files here

or click to browse from your computer

Balance quality and file weight

Compress PDF gives you clear presets so you can choose between keeping more visual detail or pushing harder for smaller output files. That makes it easier to prepare documents for email, upload portals, or document management systems with size limits.

PaperKit reports before-and-after file sizes so the result is easier to judge. If the source file is unstable before compression, a quick Repair PDF pass can help normalize it first.

Preset guidance

  • High for better fidelity on print-friendly files.
  • Balanced for common sharing and upload workflows.
  • Maximum when size matters more than image sharpness.

Why use Compress PDF online

  • High, balanced, and maximum presets.
  • Before-and-after size reporting.
  • Python-based PDF optimization on the server.

How to use Compress PDF

Step 1

Upload one PDF.

Step 2

Pick a quality preset.

Step 3

Download the compressed PDF with size stats.

Compress PDF specs and limits

Accepted files
1 PDF
Presets
High, balanced, maximum
Output
1 compressed PDF

Compress PDF FAQ

Will the file always get smaller?

Most PDFs do shrink, but some already-optimized files may stay close in size.

Does PaperKit show size changes?

Yes. The result page shows original and compressed file sizes.

Related tools

Keep working in the same flow

Optimize

Repair PDF

Run a repair pass that rewrites a PDF into a fresh normalized file.

Open tool Document Management
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Crop PDF

Trim away empty borders and tighten the visible page area.

Open tool Document Management
Convert

PDF to JPG

Convert each page of a PDF into a shareable JPG image.

Open tool Document Management

Optimize tools

More optimize PDF tools

If Compress PDF is one step in a longer workflow, these related optimize tools stay close by.

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PDF to PDF/A

Build a normalized PDF copy aimed at cleaner archival handoffs.

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OCR PDF

Run a stable normalization pass and surface whether the PDF already contains readable text.

Open tool Document Management
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Compare PDF

Compare two PDFs with an HTML diff report that makes text changes easier to review.

Open tool Document Management