PDF Compressor
Compress PDF files to reduce file size while keeping quality. Free online PDF compressor.
Drag & drop a PDF file here, or click to browse
Select a PDF file to compress
How to Compress a PDF
Reduce your PDF file size quickly and securely. All processing happens entirely in your browser -- your files are never uploaded to any server.
- Drag and drop a PDF file into the upload area, or click to browse your files
- Choose a compression quality level: Low for maximum compression, Medium for balanced results, or High for minimal quality loss
- Click "Compress PDF" to process the file
- Review the before and after file sizes and the percentage reduction
- Click "Download Compressed PDF" to save the smaller file
FAQ
Is it safe to compress PDFs here?
Yes. All processing is done locally in your browser using JavaScript. Your PDF files are never uploaded to any server, ensuring complete privacy and security.
How much can the file size be reduced?
Results vary depending on the PDF content. Files with many images tend to see the largest reductions (up to 60-70% with low quality). Text-heavy PDFs with few images may see smaller reductions since the text is already compact.
Will compression affect the text quality?
No. Text, vector graphics, and page layout are fully preserved. Only embedded images are recompressed at the selected quality level to reduce file size.
What does each quality level do?
Low Quality applies aggressive image compression for the smallest file size. Medium Quality balances file size and visual fidelity. High Quality applies light compression, keeping images close to their original appearance.
Is there a file size limit?
There is no hard limit, but very large PDFs may take longer to process since everything runs in your browser. For best performance, keep files under 100 MB.