Reduce PDF File Size Online
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Original Size: N/A
Compressed Size: N/A
Reduction: N/A
How to Use:
Drag and drop your PDF file into the area below, or click to upload. Preview your PDF, then select your desired compression level. Our tool will then compress the PDF directly in your browser, ensuring your document's privacy. Once compressed, download the smaller PDF.
How it Works (Client-Side Compression):
This tool uses JavaScript libraries (pdf-lib and pdf.js) to process your PDF file directly within your web browser. This means your PDF never leaves your computer, ensuring maximum privacy and security. Compression is primarily achieved by optimizing images, fonts, and the PDF's internal structure.
*Note on Compression Effectiveness: While this tool performs structural optimizations, significant file size reduction for PDFs with many images often requires advanced image re-encoding (downsampling, lower quality JPEG) which is beyond the scope of simple PDF library operations and may not be fully reflected by the 'Image Quality' slider alone for existing images.