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.
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.
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.
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Upload a PDF to compress and reduce its file size.
Compression Level
