Compress PDF
Reduce PDF file size while maintaining quality
Drop your file here
or click to browse from your computer
Supported: .pdf • Max 10MB
How to compress pdf
1
Upload your PDF
Drag and drop or browse to select the PDF you want to compress.
2
Click Compress PDF
PDFNinja automatically optimizes and reduces the file size.
3
Review the result
See the new file size compared to the original.
4
Download
Save the compressed PDF to your device.
About Compress PDF
Large PDF files are hard to email and slow to load. PDFNinja's Compress PDF tool reduces file size by optimizing internal structures, removing redundant data, and streamlining the document — all while preserving readable text and image quality.
Compression happens entirely on your device using WebAssembly, so your files are never uploaded. This makes it ideal for compressing confidential documents, contracts, and reports.
Features
- Significant file size reduction
- Maintains readable text and image quality
- One-click compression — no settings required
- 100% browser-based, no server upload
- Works with scanned and text PDFs