PDF Compress
Compress PDF files
Drag & drop a PDF file or click to select
Preview
Result
Frequently Asked Questions
How do I reduce PDF file size?
Upload your PDF. Choose compression level: low (best quality, ~20% reduction), medium (balanced, ~50% reduction), or high (smallest file, ~75% reduction). The tool compresses images, removes metadata, and optimizes the PDF structure. Preview before downloading.
How much can a PDF be compressed?
Depends on content. Image-heavy PDFs: 50-90% reduction. Text-only PDFs: 10-30% reduction. Already-compressed PDFs: minimal further reduction. A 10 MB scan-based PDF can often be reduced to 1-2 MB. The tool shows before/after file sizes.
Does PDF compression reduce quality?
Low compression: virtually no visible quality loss. Medium: slight reduction in image sharpness (acceptable for screen viewing). High: noticeable image quality reduction (acceptable for archiving). Text remains sharp at all compression levels.
What techniques does PDF compression use?
Image downsampling (reducing DPI). Image recompression (JPEG quality reduction). Font subsetting (embedding only used characters). Removing metadata and unused objects. Flattening transparency. Optimizing content streams. The tool applies all applicable techniques.
What is the maximum PDF file size I can compress?
The tool accepts PDFs up to 100 MB. For larger files, split them first using the PDF split tool, compress each part, then merge. Processing time depends on file size and content complexity. Most PDFs under 50 MB process in under 30 seconds.