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What do you need to do next?
Compress PDF Online — Reduce File Size Free
How to compress pdf
- Upload the PDF you want to compress by clicking the upload area or dragging the file in.
- Select a compression level: Extreme for the smallest file size, Recommended for a good balance, or Less for maximum quality.
- Click "Compress PDF" and download the optimized file. The tool shows the before and after sizes.
Why use our compress pdf tool?
Large PDF files can be slow to email, upload, or load on web pages. Our compressor uses Ghostscript to intelligently downsample images, remove duplicate resources, and optimize the internal PDF structure. The three-tier compression system lets you choose between maximum size reduction and quality preservation. The Recommended level typically reduces file size by 60-80% with minimal visible quality loss — perfect for email attachments and web uploads. After compression, you see exact before-and-after sizes and the percentage reduction, so you know exactly what you gained.
Compress PDF FAQ
Will compression reduce the quality of my text?
No. Text and vector elements are never degraded. Only raster images (photos, scans) are optimized by adjusting their resolution and compression.
How much smaller will my PDF be?
Results vary depending on content. Image-heavy PDFs (scans, brochures) can shrink by 70-90%. Text-heavy documents with few images may see 10-30% reduction.
Can I compress a PDF more than once?
You can, but re-compressing an already compressed PDF usually provides diminishing returns and may reduce image quality unnecessarily.