Compress PDF
Reduce PDF file size while preserving document quality. Choose from four compression levels and download instantly.
Click to upload or drag & drop a PDF file
Supports PDF files — choose your compression level
🗜️ The Science of Scale
In a world of digital limits, size matters. Large PDF files can be a barrier—too big for an email attachment, too slow for a web page, or too heavy for storage. Compression isn’t about losing content; it’s about streamlining it. It is the process of shedding the unnecessary weight while keeping the visual heart of the document alive.
We use advanced rasterization techniques to shrink your files. By re-rendering each page into a highly efficient compressed format, we can often reduce file sizes by up to 90%. All of this happens in your browser, keeping your sensitive data private and secure.
🚀 Optimize for Sharing
- Upload the oversized PDF you need to compress.
- Choose a compression level: Low (Best Quality) to Extreme (Smallest Size).
- Click compress and watch the real-time size reduction meter.
- Download your new, lean PDF ready for any email or upload.
💡 Finding the Balance
Use 'Medium' compression for most documents; it provides a significant size reduction without a noticeable loss in readability. Use 'High' or 'Extreme' only when reaching a strict file size limit is the priority.
❓ Frequently Asked Questions
If your PDF is already optimized or contains mostly text-based vectors, rasterization might not reduce it much. It works best on scanned documents and high-resolution images.
Because we rasterize pages for maximum size reduction, text becomes part of the image and is no longer selectable. If you need selectable text, try our 'PDF Split' tool to remove extra pages instead.
Demystifying the PDF Format: Object Streams, Linearization, and Digital Signatures →
Learn how PDF cross-reference tables (xref), object streams, linearization, and client-side cryptographic signatures work under the hood.