Compress PDF — Reduce File Size Free
Reduce PDF file size by up to 80% online for free. Compress PDFs for email, uploading or sharing without losing quality. No signup needed.
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About PDF Compressor
Large PDF files are slow to upload, hard to email, and frustrating to share. Our PDF compressor reduces file sizes by up to 80% by optimising embedded images, removing redundant data, and applying lossless compression. You can choose between different quality levels — from maximum compression for very small files to high quality for documents that need to stay sharp. The compressed PDF retains all text, links, and structure. Ideal for scanned documents, image-heavy reports, portfolios, and e-books before sharing via email or uploading to a website.
Frequently Asked Questions
How much can I reduce my PDF size?
Typically 40-80% depending on the content. Image-heavy PDFs compress the most.
Will compression reduce the quality?
You can choose your quality level. High quality compression is nearly imperceptible.
Is there a file size limit?
Files up to 100MB can be compressed.
Does compressing remove pages or content?
No. All pages, text, and links remain intact. Only image data and redundant metadata are optimised.
Can I compress a password-protected PDF?
You will need to unlock the PDF first, then compress it.