Compress PDF is a browser-based tool on PDFBro. Shrink your PDF file size by up to 80% while preserving readability. Choose Low, Medium, or High compression based on your needs. Runs locally in your browser — no upload required. No signup required, no watermarks added. Maximum file size: 100 MB.
How to Use Compress PDF
- Upload your PDF: Drag and drop or click to upload the PDF you want to compress.
- Choose compression level: Select a compression level: low (best quality), medium (balanced), or high (smallest size).
- Compress and download: Click Compress and download your smaller PDF.
FAQ
- How do I compress a PDF online for free?
- Upload your PDF to PDFBro's Compress PDF tool, choose your compression level, and click Compress. The smaller PDF downloads immediately — no signup needed.
- How much can PDF compression reduce file size?
- Depending on the content, compression can reduce PDF size by 30–80%. PDFs with many images compress the most.
- Does compressing a PDF affect quality?
- PDFBro offers multiple compression levels. At low compression, quality is nearly identical to the original. Higher compression reduces image resolution.
- Why is my PDF not getting smaller after compression?
- PDFs that already have compressed images or mostly contain text may not compress much further. Try the 'High' compression mode for maximum reduction.