Compress PDF Files to Smaller Sizes

Shrink large PDF documents for email attachments, web uploads, and archiving.

How to Compress a PDF Online

  1. Choose PDF file: Select or drag your PDF document into the compressor.
  2. Select compression level: Choose between Low, Medium, or High compression balance.
  3. Download optimized PDF: Download your compressed PDF with significant file size savings.

Why this tool

  • Configurable Compression Levels: Balance between maximum file size reduction and image clarity.
  • Instant Savings Calculation: See estimated output size update as you move the quality slider.
  • Text Stays Selectable: Compression recompresses images only — it does not flatten pages like Flatten PDF.

Frequently asked questions

How much can I reduce my PDF size?

Depending on the images and content in your PDF, file sizes can often be reduced by 50% to 85%.

Is compressing the same as flattening?

No. Flattening locks layers and interactive content into a static look. Compression shrinks file size while keeping text, fonts, and forms usable.

Is it safe to compress sensitive business documents?

Yes, because Paprkit compresses the document locally on your CPU/GPU without transmitting bytes across the internet.