PDF Compress
Reduce PDF file size by optimizing embedded images. Client-side compression using Canvas API.
Compress PDF
Upload a PDF file and choose a compression level to reduce its file size.
Select a PDF file to compress
Upload a PDF file above to compress it. Choose a compression level and download the optimized file. All processing happens in your browser.
How to Use
- Click "Choose PDF File" to upload your PDF document
- Select a compression level: Low (best quality), Medium (balanced), or High (smallest file)
- Click "Compress PDF" to start the compression
- Review the compression results showing original and compressed sizes
- Click "Download" to save the compressed PDF to your device
Frequently Asked Questions
How does PDF compression work?
PDF compression works by optimizing the internal structure of the PDF file. This includes removing unused objects, stripping redundant data, and re-encoding embedded images at a lower quality. The amount of size reduction depends on the original file's content and how it was created.
Is my PDF data secure during compression?
Yes, completely. All compression happens directly in your browser using JavaScript. Your PDF file is never uploaded to any server. The data never leaves your device, ensuring full privacy and security.
What is the difference between the compression levels?
Low compression preserves the highest quality (80% image quality) with minimal size reduction. Medium compression offers a balance between quality and file size (60% image quality). High compression produces the smallest files (40% image quality) but may introduce visible quality loss in images.
Will compression affect the text quality in my PDF?
No. Text, vector graphics, and fonts in your PDF remain unchanged during compression. Only embedded raster images are affected by the quality settings. Text will remain sharp and searchable regardless of the compression level you choose.