PDF Compressor Online
Loading tool...
PDFs exported from design software like Illustrator or InDesign are often massively bloated with high-resolution print assets, making them impossible to email. This PDF Compressor is built to intelligently downsample those assets and reduce your file size without destroying the visual quality.
Smart Downsampling
Instead of just aggressively crushing the entire file, the compression algorithm specifically targets raster images embedded within the document. It downscales massive 300 DPI print photos to web-friendly 72 DPI resolutions, which often reduces the final file size by over 80% with no visible difference on a screen.
Local Processing
Many people compress their resumes or financial reports using sketchy online tools. This tool executes the compression library entirely via WebAssembly in your browser, meaning your private documents are never uploaded to an unknown server.
How to use PDF Compressor
Upload your PDF file.
Select compression level (low, medium, high).
Download the compressed PDF.
Example Usage
Sample Input / Output
Upload a PDF file to compress
This shows a sample input and the format you can expect back from pdf compressor.
Frequently Asked Questions
How much can a PDF be compressed?
Typical compression reduces file size by 20-70% depending on PDF content and chosen compression level.
Does compression affect text quality?
Text is not affected. Image quality may slightly decrease at higher compression levels.
Professional Resources & Documentation
Stay updated with the latest industry standards and technical specifications. Our team recommends these authoritative sources for deepening your understanding of pdf compressor and related technologies.
Official history and technical background of the PDF standard.
RFC 3778 - The application/pdf Media Type.
Extensive overview of the Portable Document Format.
Related Tools
Merge PDF
Combine multiple PDF files into a single document online for free.
Split PDF
Extract specific pages or split your PDF into individual files.
JPG to PDF Converter
Convert your JPG images to a high-quality PDF document instantly.
How to use PDF Compressor
Step-by-step guide, tips, and use cases