Drop your file, choose a compression level, and download in seconds. Everything runs locally in your browser — files never leave your device.
or click to choose a local PDF file
Multiple files supported · Download individually or together after compression
Compressing PDF…
Drop or select PDF files. Add multiple files at once for batch processing.
Pick a compression level based on your quality needs and preview the expected result.
Check the before/after size comparison and download your compressed file.
All PDFs are processed locally in your browser. Files never leave your device, eliminating privacy leakage from the root.
Powered by your browser's native computing, compression finishes in seconds. No upload/download waiting.
Three levels — Light, Recommended, Extreme — to find the best balance between quality and size for your needs.
Pure web tool — just open your browser. No software or plugins to download, works cross-platform.
It depends on the level. Light compression has almost no visible difference. Recommended keeps readability while reducing size. Extreme noticeably lowers image sharpness — ideal for text-only or low-quality-tolerant files.
No. All PDF processing happens locally in your browser. File data never leaves your device. The page even works offline after loading.
Free plan: 1 compression per day and max 50MB per file. For larger files or more compressions, please contact the administrator.
The tool uses the pdf-lib library to parse the PDF structure locally and re-organize object streams to reduce size. For image-heavy pages, images are extracted to a Canvas and re-encoded as JPEG (with quality adjusted by the level), effectively shrinking the file.
Supports the latest versions of Chrome, Firefox, Edge, Safari and other major modern browsers. Chrome or Edge is recommended for the best performance.
Start free, no tricks. Pick a plan that fits — register to use it once free, or upgrade for more.
Real tips from PDF compression, ordered by workflow. Share your own below.