PDF Compressor
PDF Compressor is a free online tool that reduces PDF file size with three compression levels — low, medium, and high. It intelligently optimizes the images inside the PDF, shows real-time progress, and reports the original size, compressed size, and space saved. Files up to 100MB are supported.
All compression happens locally in your browser, so your file is never uploaded to a server. Free with no sign-up, it's perfect for shrinking contracts, resumes, and reports that need to fit email or upload size limits.
How to Use
- Click Select File or drag a PDF into the upload area (up to 100MB)
- Choose a compression level: low, medium, or high
- Click Start Compression and wait for the progress to finish
- Review the size comparison and download the compressed PDF
FAQ
Is this PDF compressor free?
Yes, completely free. The compressed PDF has no watermark, there is no page limit, and no registration is needed.
Is my PDF uploaded during compression?
No. Compression runs entirely in your browser and the file never leaves your device, so contracts, resumes, and other sensitive files stay private.
Will compression hurt the quality of my PDF?
Compression works mainly by optimizing the images in the PDF. The low level barely affects clarity, while the high level gives the smallest file but may reduce image quality. Text-only PDFs see limited size reduction.
Is there a file size limit?
Yes, files up to 100MB are supported. Password-protected PDFs may fail to compress, so remove the encryption first if possible.