Reduce PDF File Size — Free Online Compressor
Large PDF files take up storage space, slow down email, and are awkward to share. Our free PDF size reducer shrinks your PDF in seconds — and because it works entirely in your browser, your file is never uploaded to any server. Choose from three compression levels to match your quality and size needs.
Recommended setting: Balanced — Balanced compression is the sweet spot for most use cases — it reduces file size by 50–65% while keeping text and images sharp.
Drop your PDF here or click to browse
PDF files only · Any size
🔒 100% Private
Your PDF never leaves your device. All compression happens in your browser.
Frequently Asked Questions
What is the best way to reduce a PDF file size?
The most effective way is to re-compress the embedded images at a lower quality. Our tool does this automatically in your browser — no software to install, no upload required.
How much can I reduce a PDF's file size?
PDFs with many images typically reduce by 50–80%. Text-heavy PDFs reduce by 20–40%. The tool shows the exact before and after size after compression.
Does reducing PDF size affect the content?
The visual content is preserved. Compression converts pages to compressed images, so text may not be directly selectable, but the document looks the same on screen.
More PDF Compression Options
Sending a resume? Check it passes ATS first →
Free ATS Resume CheckerNeed a cover letter to go with your resume? →
Free AI Cover Letter Generator