Compress PDF
Compress PDF files online for free. Shrink PDF size for email without losing quality.
How to use Compress PDF
- Select or drop your PDF document into the tool upload box.
- Select your target compression quality level (Recommended Compression, High Compression, or Low Compression).
- Click "Execute Compress PDF" to shrink the document file size.
- Review the file size savings percentage and download your compressed PDF.
Technical Details & Specifications
Images inside the PDF stream are re-sampled and compressed using HTML5 Canvas WebGL rendering pipelines, reducing stream byte counts while maintaining vector font nodes.
Frequently Asked Questions
How does AllPDFTool compress PDF files without uploading to a server?
AllPDFTool's Compress PDF tool renders document pages onto an offscreen WebGL/Canvas context, re-encodes raster graphics with optimized JPEG compression ratios, and removes duplicate metadata streams locally in browser memory.
Will compressing my PDF reduce text quality or make it blurry?
AllPDFTool preserves crisp vector text and font definitions while selectively optimizing high-resolution embedded images to achieve significant file size reduction.
Is there a file size limit for PDF compression on AllPDFTool?
AllPDFTool imposes no file size limits on PDF compression, permitting processing of large multi-megabyte documents according to your system memory capacity.
Does PDF compression work offline on AllPDFTool?
AllPDFTool's compression scripts execute client-side in browser RAM, meaning compression functions reliably once the web page is loaded.